JP2008103007A - Information processor, information recording medium, information processing method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor, information recording medium, information processing method, and computer program which can record and use a unique identifier similar to a 128-bit media ID by preventing unauthorized use such as data alteration. <P>SOLUTION: For the information recording medium on which the 128 bit media ID is not recorded, the 128 bit unique data is produced by combining either a device identifier corresponding to a recording device (device number) or a drive ID in a drive public key certificate (drive certificate) corresponding to a drive and a counter value or a pseudo random number and recorded in the information recording medium. Herewith, for the media without the 128 bit media ID such as DVD+R/+RE/-R/-RW/-RAM, the recording device can record different media IDs on respective media even when recording the media IDs on the media. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information processing apparatus, an information recording medium, an information processing method, and a computer program. More specifically, an information processing apparatus, an information recording medium, and an information processing method for realizing a recording process of a unique identifier (media ID) for an information recording medium and a content use control process using the media ID, and It relates to computer programs.

  Recently, DVD (Digital Versatile Disc), Blu-ray Disc (registered trademark), and the like are used as recording media for contents such as music and movies. These information recording media include media (ROM type) in which data is recorded in advance and new data writing is not allowed (R type, RW type, etc.). By using an information recording medium in which data can be written, the user can record various contents via, for example, a network or a device installed in a public place.

  However, many contents such as music data, image data, etc. have copyrights, distribution rights, etc. in their creators or distributors. When distributing these contents, there are certain usage restrictions, that is, to legitimate users. In general, it is common to adopt a configuration that permits use of content and prevents unauthorized copying or the like.

  One method of content usage restriction is a system in which content is encrypted and distributed, and only a user or device having a valid content usage right can decrypt the content. A configuration for performing content usage control by encrypting content is described in Patent Document 1, for example.

For example, there are the following standards as main standards for the physical format of a DVD in which data can be written.
DVD-R: write once (write once)
DVD + R: Write once (write once)
DVD-RW: rewritable type (can be erased and rewritten)
DVD + RW: rewritable type (erasable and rewritable)
DVD-RAM: rewritable (erasable and rewritable)

  Among these DVD standards, DVD-R, DVD-RW, and DVD-RAM are discs that support CPRM (Content Protection for Recordable Media), which is a copyright protection specification for content. Each of these DVD-R, DVD-RW, and DVD-RAM discs has a configuration in which a CPRM-compatible identifier (media ID) unique to each disc is recorded in order to realize content usage processing compatible with CPRM. Note that CPRM is described in Non-Patent Document 1, for example.

  In general, the media ID is set as data that can be recorded only by a specific licensed media manufacturer, and is recorded on the media as data that can be read only by a data recording / reproducing program according to the process defined by CPRM. Each of the DVD-R, DVD-RW, and DVD-RAM discs is a burst standard which is an area for recording information such as a media ID in an inner peripheral area of the information recording medium by a method different from normal data recording. NBCA (Narrow Burst Cutting Area) and BCA (Burst Cutting Area) are defined as the cutting area, and a 64-bit length CPRM-compatible media ID is recorded in BCA.

  When performing content use processing corresponding to CPRM, for example, content reproduction, content copy, recording processing, etc. from a disc, a 64-bit media ID is read from the media, and processing according to a sequence defined by CPRM, such as key generation processing, It is necessary to perform content encryption processing or the like.

  On the other hand, among the above DVD standards, DVD + R and DVD + RW are discs that do not define a media ID and do not support CPRM.

  Furthermore, AACS (Advanced Access Content System) is a copyright protection specification for new contents different from the above-described CPRM. AACS defines a copyright protection technology based on common key encryption (AES encryption) higher than CPRM. AACS is described in Non-Patent Document 2, for example. CPRM is a specification corresponding to video content with a resolution corresponding to SD (Standard Definition), but AACS is capable of handling high-definition video corresponding to higher definition HD (High Definition). Yes.

  Similar to CPRM, when performing AACS-compatible content use processing such as content playback, content copying, and recording processing from a disc, the media ID is read from the media, processing according to a sequence specified by AACS, for example, a title key message It is necessary to perform authentication processing. AACS defines a 128-bit media ID, and a disc on which a 128-bit media ID is recorded is an AACS compatible disc.

  For example, next-generation discs such as HD DVD-R, HD DVD-RW, HD DVD-RAM, Blu-ray Disc (registered trademark), and Blu-ray Disc (registered trademark) Rewritable are BCA is defined as a physical standard, and has a configuration capable of storing a 128-bit media ID in BCA, and is an AACS compatible disc.

  On the other hand, in the DVD standard, DVD + R and DVD + RW are discs that do not define media IDs and do not support AACS.

  In recent years, MPEG-4 AVC (Advanced Video Coding), which realizes a higher compression rate than MPEG-2, has become available with the advancement of video compression technology, and the application of MPEG-4 AVC will enable the next generation of digital broadcasting of HD images. It is also possible to record on a conventional DVD medium without shortening the recording time without using the optical disc standard (Blu-ray Disc (registered trademark) or HD-DVD).

  Thus, with the advancement of video compression technology, it is possible to record on conventional DVD media without using next-generation optical disc standards (Blu-ray Disc (registered trademark) and HD-DVD). For example, DVD + R and DVD + RW do not define media IDs, and when these media are used, the content according to the AACS specification cannot be used at present. Further, even in the above-described DVD-R, DVD-RW, and DVD-RAM, the media ID recorded in the BCA is 64 bits and does not correspond to the AACS that defines the 128-bit media ID, and these media are used. In such a case, it is currently impossible to use content according to the AACS specification.

In addition, VCPS (Video Content Protection System) has been proposed as a standard of copyright protection technology corresponding to DVD + R and DVD + RW. In this VCPS, a configuration for generating and recording a unique ID of 40 bits by generating a random number is proposed. However, the VCPS 40-bit unique ID length may not be sufficient. VCPS is described in Non-Patent Document 3, for example. Furthermore, since the random number is simply generated, the same random number value may be generated between different devices.
JP 2003-116100 A CPRM DVD Book, Revision 0.96 http://www.4centity.com/tech/cprm/ AACS Common Book, Revision 0.91 AACS Recordable Video Book, Revision 0.91 http://www.aacsla.com/specifications/ VCPS specifications version 1.34, April 2006 http://www.licensing.philips.com/vcps/documents1024.html

  The present invention has been made in view of such a situation. In a medium that does not have a BCA or the like as a recording area with a 128-bit media ID, the device identifier is used to identify the same uniqueness as the 128-bit media ID. Provided is an information processing apparatus, an information recording medium, an information processing method, and a computer program capable of realizing a configuration in which an identifier is recorded on a medium and used without causing unauthorized use such as falsification of data. For the purpose.

The first aspect of the present invention is:
A storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus;
A media ID configuration information generation unit that generates bit information that configures a media ID as a unique identifier corresponding to an information recording medium (media);
A media ID generation unit that generates a media ID configuration bit generated by the media ID configuration information generation unit and data including the device identifier as a media ID to be recorded on the information recording medium;
An information recording unit for recording the media ID generated by the media ID generation unit on an information recording medium;
There is an information processing apparatus characterized by having.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the media ID configuration information generation unit is configured by a counter that generates a different counter value for each media ID generation process, and the media ID generation unit includes the counter Is generated as a media ID to be recorded on the information recording medium (medium).

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID configuration information generation unit is configured by a random number generation unit that generates a random number, and the media ID generation unit includes a random number generated by the random number generation unit, The data including the device identifier is generated as a media ID to be recorded on the information recording medium (medium).

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD + R or a DVD + RW medium, and the media ID generation unit includes a media ID configuration bit generated by the media ID configuration information generation unit, An AACS (Advanced Access Content System) compatible media ID including the device identifier and including 128-bit data is generated.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID generation unit adds the media ID configuration bit generated by the media ID configuration information generation unit, the device identifier, and other data. The present invention is characterized in that it is configured to generate an AACS-compliant media ID consisting of 128-bit data.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit is configured to execute a process of recording the media ID generated by the media ID generation unit in a lead-in area of the information recording medium. It is characterized by.

  Furthermore, in an embodiment of the information processing apparatus according to the present invention, the information recording unit uses the media ID generated by the media ID generation unit as a second buffer zone [Lead-in Zone in a lead-in area of the information recording medium. / Buffer Zone2] sector header (RSV), and the recording process is executed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System), and the information recording unit is generated by the media ID generation unit. The present invention is characterized in that a process for recording a media ID compatible with AACS (Advanced Access Content System) and a unique ID compatible with VCPS generated by a random number in a lead-in area of an information recording medium is performed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD-R, DVD-RW, or DVD-RAM medium having a recorded media ID as recorded data, and the media ID generation unit Further, the media ID configuration information generated by the media ID configuration information generating unit and the device identifier, and the additional recording media ID composed of 64-bit data are generated as the additional recording media ID to be recorded on the information recording medium (medium). It is the structure.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID generation unit adds the media ID configuration bit generated by the media ID configuration information generation unit, the device identifier, and other data. The write-once media ID consisting of 64-bit data is generated.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit is configured to execute a process of recording the additional recording media ID generated by the media ID generation unit in a lead-in area of the information recording medium. It is characterized by that.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit adds the additional recording media ID generated by the media ID generation unit to a sector header (CPR_MAI) of a free area in the lead-in area of the information recording medium. The present invention is characterized in that the process of dividing and recording is executed.

Furthermore, the second aspect of the present invention provides
An information processing device as a drive device that executes access to an information recording medium and executes data input / output between hosts,
A storage unit that stores a drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data;
A media ID configuration information generation unit that generates bit information that configures a media ID as a unique identifier corresponding to an information recording medium (media);
A media ID generating unit that generates data including a media ID configuration bit generated by the media ID configuration information generating unit and a drive ID acquired from the drive certificate as a media ID to be recorded on the information recording medium;
An information recording unit for recording the media ID generated by the media ID generation unit on an information recording medium;
There is an information processing apparatus characterized by having.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the drive certificate is a drive public key certificate that stores a drive public key set corresponding to the drive apparatus, and the media ID generation unit The configuration is such that the processing for generating the media ID is executed using the drive ID recorded in the drive public key certificate.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the media ID configuration information generation unit is configured by a counter that generates a different counter value for each media ID generation process, and the media ID generation unit includes the counter Is generated as a media ID to be recorded on the information recording medium (medium).

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID configuration information generation unit is configured by a random number generation unit that generates a random number, and the media ID generation unit includes a random number generated by the random number generation unit, The data including the drive ID is generated as a media ID to be recorded on the information recording medium (medium).

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD + R or a DVD + RW medium, and the media ID generation unit includes a media ID configuration bit generated by the media ID configuration information generation unit, An AACS (Advanced Access Content System) compatible media ID including 128-bit data including the drive ID is generated.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID generation unit adds the media ID configuration bit generated by the media ID configuration information generation unit, the drive ID, and other data. The present invention is characterized in that an AACS-compliant media ID composed of 128-bit data is generated.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit is configured to execute a process of recording the media ID generated by the media ID generation unit in a lead-in area of the information recording medium. It is characterized by.

  Furthermore, in an embodiment of the information processing apparatus according to the present invention, the information recording unit uses the media ID generated by the media ID generation unit as a second buffer zone [Lead-in Zone in a lead-in area of the information recording medium. / Buffer Zone2] sector header (RSV), and the recording process is executed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System), and the information recording unit is generated by the media ID generation unit. The present invention is characterized in that a process for recording a media ID compatible with AACS (Advanced Access Content System) and a unique ID compatible with VCPS generated by a random number in a lead-in area of an information recording medium is performed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording medium is a DVD-R, DVD-RW, or DVD-RAM medium having a recorded media ID as recorded data, and the media ID generation unit Further, the media ID configuration information generated by the media ID configuration information generation unit and the drive ID are included, and an additional recording media ID consisting of 64-bit data is generated as an additional recording media ID to be recorded on the information recording medium (medium). It is the structure.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID generation unit adds the media ID configuration bit generated by the media ID configuration information generation unit, the drive ID, and other data. The write-once media ID consisting of 64-bit data is generated.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit is configured to execute a process of recording the additional recording media ID generated by the media ID generation unit in a lead-in area of the information recording medium. It is characterized by that.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information recording unit adds the additional recording media ID generated by the media ID generation unit to a sector header (CPR_MAI) of a free area in the lead-in area of the information recording medium. The present invention is characterized in that the process of dividing and recording is executed.

Furthermore, the third aspect of the present invention provides
An information processing apparatus for reading data from an information recording medium (media),
When recording or reproducing content using DVD + R or DVD + RW media having recorded media ID as recorded data, a recorded media ID corresponding to CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium and information recording The information processing apparatus includes a media ID generation unit that generates a 128-bit AACS (Advanced Access Content System) compatible media ID based on the additional recording media ID added to the medium.

  Furthermore, in one embodiment of the information processing apparatus of the present invention, the media ID generation unit reads a 64-bit CPRM-compatible media ID recorded in a burst cutting area (BCA) of the information recording medium and the information recording medium read. The present invention is characterized in that a process of generating a 128-bit AACS compatible media ID based on the 64-bit additional recording media ID recorded in the in area is performed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information processing apparatus includes a data processing unit that executes content recording on an information recording medium or content reproduction processing from the information recording medium, and the data processing The unit is configured to apply a 128-bit media ID generated by the media ID generation unit and execute a content recording or playback sequence defined by AACS.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the information processing apparatus is a drive apparatus that executes access to an information recording medium and executes data input / output with a host, and records content specified by AACS Alternatively, a data output unit that executes a process of outputting a 128-bit media ID generated by the media ID generation unit to a host that executes a playback sequence is provided.

Furthermore, the fourth aspect of the present invention provides
An information recording medium (media) compliant with the DVD + R or DVD + RW standard,
Content recording or playback in accordance with AACS regulations by processing a media ID, which is a unique identifier of a 128-bit medium, recorded in a lead-in area of an information recording medium and applying the media ID in an information processing apparatus The information recording medium is characterized by having a configuration that enables the

  Furthermore, in one embodiment of the information recording medium of the present invention, the information recording medium uses the media ID as a sector header of a second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the information recording medium. (RSV) is divided and recorded.

  Furthermore, in an embodiment of the information recording medium of the present invention, the information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System), and the AACS compatible media ID and the VCPS compatible unique ID are set. It is a structure recorded in the lead-in area.

Furthermore, the fifth aspect of the present invention provides
An information recording medium (media) compliant with the DVD-R, DVD-RW, or DVD-RAM standard,
A 64-bit recorded media ID corresponding to CPRM (Content Protection for Recordable Media) is recorded in the burst cutting area (BCA) as recording data, and an additional recording medium ID, which is a 64-bit media-specific identifier, is recorded in the lead-in area. As
An information recording medium having a configuration capable of recording or reproducing content in accordance with AACS regulations by a 128-bit media ID generation process using a prerecorded media ID and the additional recording media ID in an information processing apparatus It is in.

  Furthermore, in an embodiment of the information recording medium of the present invention, the information recording medium has a configuration in which the additional recording medium ID is divided and recorded in a sector header (CPR_MAI) of a lead-in area of the information recording medium. Features.

Furthermore, the sixth aspect of the present invention provides
In the information processing apparatus, an information processing method for executing processing for recording a media ID as a unique identifier corresponding to an information recording medium (media) on the information recording medium
A medium ID configuration information generation unit for generating configuration information of a medium ID as a unique identifier corresponding to an information recording medium (medium);
The media ID generation unit reads the device identifier from a storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus, and includes the media ID configuration information and data including the device identifier. A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step in which the information recording unit records the media ID generated by the media ID generation unit on an information recording medium;
There is an information processing method characterized by comprising:

Furthermore, the seventh aspect of the present invention provides
An information processing method executed in a drive device that executes access to an information recording medium and executes data input / output between hosts,
A medium ID configuration information generation unit that generates configuration information of a medium ID that is a unique identifier corresponding to an information recording medium (medium);
The media ID generator
A drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data is read from a storage unit, and the media ID configuration information and data including the drive ID are stored in the information A medium ID generating step for generating a medium ID to be recorded on the recording medium;
An information recording step in which the information recording unit records the media ID generated by the media ID generation unit on an information recording medium;
There is an information processing method characterized by comprising:

Furthermore, the eighth aspect of the present invention provides
An information processing method in an information processing apparatus for reading data from an information recording medium (media),
When the media ID generation unit records or reproduces the content using the DVD + R or DVD + RW media having the recorded media ID as the recording data, it has been recorded corresponding to CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium. An information processing method for executing a media ID generation step of generating a 128-bit AACS (Advanced Access Content System) compatible media ID based on the media ID and the additional recording media ID added to the information recording medium It is in.

Furthermore, the ninth aspect of the present invention provides
In the information processing apparatus, a computer program for executing a process of recording a media ID as a unique identifier corresponding to an information recording medium (medium) on the information recording medium,
A media ID configuration information generating step for causing the media ID configuration information generation unit to generate configuration information of the media ID as a unique identifier corresponding to the information recording medium (medium);
The media ID generation unit is caused to read the device identifier from a storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus, and the media ID configuration information and data including the device identifier are stored. A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step for causing the information recording unit to record the media ID generated by the media ID generation unit on the information recording medium;
In a computer program characterized by causing

Furthermore, the tenth aspect of the present invention provides
A computer that executes a process of recording a media ID as a unique identifier corresponding to an information recording medium (medium) on the information recording medium in a drive device that executes access to the information recording medium and executes data input / output between hosts A program,
A medium ID configuration information generating unit that generates media ID configuration information that is configuration information of a media ID as a unique identifier corresponding to an information recording medium (medium);
In the media ID generator,
A drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data is read from a storage unit, and the media ID configuration information and data including the drive ID are A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step of causing the information recording unit to record the media ID generated by the media ID generation unit on the information recording medium;
In a computer program characterized by causing

Furthermore, an eleventh aspect of the present invention is
A computer program that causes an information processing device that reads data from an information recording medium (medium) to execute media ID generation processing,
When recording or playing back content using a DVD + R or DVD + RW media having a recorded media ID as recording data in the media ID generation unit, the recording has been performed in accordance with CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium. A computer program for executing a media ID generation step for generating a 128-bit AACS (Advanced Access Content System) compatible media ID based on the media ID and the additional recording media ID added to the information recording medium It is in.

  The computer program of the present invention is, for example, a storage medium or a communication medium provided in a computer-readable format to a computer system that can execute various program codes, such as a DVD, a CD, and an MO. It is a computer program that can be provided by a recording medium or a communication medium such as a network. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the computer system.

  Other objects, features, and advantages of the present invention will become apparent from a more detailed description based on embodiments of the present invention described later and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.

  According to the configuration of one embodiment of the present invention, for example, for an information recording medium (medium) in which a 128-bit media ID defined by AACS is not recorded, a device identifier (Device Number) corresponding to the recording apparatus, or Apply any one of the drive IDs in the drive public key certificate (Drive Certificate) corresponding to the drive, and further generate 128-bit unique data by combining the counter value or random number, for example, lead-in of the information recording medium It was set as the structure recorded on an area | region. With this configuration, it is possible to record and use a 128-bit media ID even on media that does not have a 128-bit media ID defined by AACS, such as DVD + R / + RE / -R / -RW / -RAM media. This makes it possible to execute a content reproduction or recording sequence, and to eliminate the possibility of generating the same media ID between different devices.

The details of the information processing apparatus, information recording medium, information processing method, and computer program of the present invention will be described below with reference to the drawings. The description will be made according to the following items.
1. 1. Content recording / playback processing configuration using a recording / playback device integrated with a drive device 1.1. Content recording and playback processing in accordance with AACS regulations 1.2. DVD + R or DVD + RW usage process according to one embodiment of the present invention 1.3. 1. Processing for using DVD-R, DVD-RW, and DVD-RAM according to one embodiment of the present invention 2. Content recording / playback processing configuration using a recording / playback device such as a PC connected to a drive device 2.1. Content recording and playback processing according to AACS regulations 2.2. DVD + R or DVD + RW utilization process according to one embodiment of the present invention 2.3. 2. DVD-R, DVD-RW, DVD-RAM usage processing according to an embodiment of the present invention; Recording structure of media ID in information recording medium (media) 3.1. Recording structure of media ID in DVD + R or DVD + RW 3.2. 3. Media ID recording configuration in DVD-R, DVD-RW, DVD-RAM Functions and configuration of information processing equipment

[1. Content Recording / Reproducing Processing Configuration Using Recording / Reproducing Device with Integrated Drive Device]
First, a content recording / playback processing configuration using a recording / playback device integrated with a drive device will be described. In addition, as an aspect of performing content reproduction and content recording processing from media (information recording medium),
(1) Processing configuration using a recording / reproducing device with an integrated drive device (2) Processing configuration using a recording / reproducing device such as a PC connected to the drive device . In the present specification, the processing modes (1) and (2) will be described item by item.

First, (1) in the description of the processing configuration using the recording / reproducing apparatus in which the drive device is integrated, first, content recording and reproduction processing in accordance with AACS regulations will be described with reference to FIG. afterwards,
[DVD + R or DVD + RW utilization process according to an embodiment of the present invention], and
[Usage processing of DVD-R, DVD-RW, DVD-RAM according to one embodiment of the present invention]
These processes will be described sequentially.

(1.1. Content recording and playback processing in accordance with AACS regulations)
First, a sequence in the case of performing content recording and reproduction processing in accordance with ACSS (Advanced Access Content System) specifications using a recording / reproducing apparatus with an integrated drive device will be described with reference to FIG.

  In FIG. 1, a central medium (information recording medium) 110 is a data recordable medium 110 corresponding to the AACS standard. Specifically, as described above, the medium 110 has a 128-bit media ID recorded in the burst cutting area (BCA). The left side is an AACS compatible recording device 120 that executes content recording processing on the medium 110 according to the recording sequence according to the AACS standard, and the right side is that content recorded on the medium 110 is executed based on the playback sequence according to the AACS standard. This is an AACS-compatible playback device 130.

  First, the recording information of the AACS compatible medium 110 will be described. As shown in the figure, the media 110 includes an MKB (Media Key Block) 111, a media ID (Media Identifier) 112, a MAC verification value 113, a binding nonce 114, a unit key file 115, usage control information (Usage Rule) 116, Encrypted content 117 is recorded. Each of these data will be described sequentially.

(1) MKB (Media Key Block)
An MKB (Media Key Block) 111 is an encryption information (encryption key) block generated based on a tree-structured key distribution method known as one aspect of the broadcast encryption method. The MKB 111 can acquire the media key [Km], which is a key necessary for decrypting the content, only by processing (decryption) based on the device key [Kd] stored in the information processing apparatus of the user having a valid license. It is a cryptographic information block. That is, a media key is stored as secret information.

  The media key [Km] can be acquired only when the user device (information processing apparatus) has a valid license, and the media key [Km] cannot be acquired in a disabled (revoked) user device. It becomes possible. In other words, the MKB can acquire the secret information only when the device key distributed to a specific selected device is applied, and the secret information can be acquired when the device key distributed to the revoke device that is an exclusion device is applied. It is an encryption information block having a configuration that cannot be obtained.

  The management center as a license entity cannot be decrypted with a device key stored in a specific user device by changing a key set used for encrypting the media key [Km] stored in the MKB, that is, a media key necessary for content decryption. It is possible to generate an MKB having a configuration in which it cannot be acquired. Accordingly, it is possible to provide an encrypted content that can be decrypted only to a device having a valid license by removing (revoking) an unauthorized device at an arbitrary timing.

(2) Media ID
The media ID 112 is identification information (ID) unique to the medium (information recording medium). AACS-compliant media such as Blu-ray Disc (registered trademark) Recordable, Blu-ray Disc (registered trademark) Rewritable, etc. define a burst cutting area (BCA) as a physical standard. A 128-bit media ID is recorded. The media ID is set as data that can be recorded only by a specific licensed media manufacturer. When data recording / reproducing is performed in accordance with the AACS regulations, the media ID is read from the media 110 to perform predetermined processing such as confirmation processing. It is essential to do.

(3) MAC verification value The MAC verification value 113 is data generated by a MAC generation process for a media ID using a title key (also referred to as a CPS unit key or unit key) used as a content encryption key. This is a MAC (Message Authentication Code) generated as verification data for associating a media ID, which is a value unique to each medium, with a title key corresponding to the content. When content is recorded, it is generated in a recording device and recorded on a medium. At the time of reproduction, the content reproduction condition is that MAC verification is performed and the verification is established.

(4) Binding nonce Binding nonce (Binding Nonce) 114 is information applied to encryption of a title key (also referred to as CPS unit key or unit key) used as a content encryption key, and records content on media. In the process, it is used for encrypting the title key, and in the process of reproducing content from the media, it is applied to the acquisition of the title key by decrypting the encrypted title key. The title key is acquired by the decryption, and the encrypted content is decrypted by applying the obtained title key.

(5) Unit Key File The unit key file 115 is a file that stores key data obtained by encrypting the above-described title key. Also called a CPS unit key file. The encrypted content recorded on the medium 110 is divided into units, each of which is associated with a title key (CPS unit key), and is encrypted and recorded with a title key corresponding to the unit. The unit key file 115 is a file in which the title key corresponding to the unit included in the encrypted content recorded on the media is encrypted and recorded. When reproducing the content recorded on the media, it is necessary to generate a different title key for each divided unit and perform a decryption process.

(6) Usage Control Information Usage control information (Usage Rule) 116 is data that records content usage control information, and includes, for example, copy / playback control information (CCI). That is, copy restriction information for use control corresponding to the encrypted content 117 stored in the medium 110 and reproduction restriction information. This copy / playback control information (CCI) can be set in various ways, for example, when it is set as individual information for a CPS unit set as a content management unit, or when set for a plurality of CPS units. is there.

(7) Encrypted Content The encrypted content 117 is content recorded in accordance with AACS regulations, and includes an AV (Audio Visual) stream of moving image content such as HD (High Definition) movie content that is high-definition moving image data, for example. Content. This content is stored according to a specific AV data format. In order to realize different usage control for each divided content, a different key for each divided content, that is, the above-described title key (also referred to as a CPS unit key or unit key) is assigned and encrypted. A unit to which one title key is assigned is called a content management unit (CPS unit).

[Content recording process]
Next, content recording processing for the medium 110 executed by the recording device 120 will be described. The recording device 110 is an AACS-compliant recording device, and holds a device key (Kd) 121 and a device identifier (Device Number) 122 in a memory. The recording device 120 as an AACS compatible recorder possesses a device key (Kd) 121 and a device identifier (Device Number) 122 specific to the device for MKB processing. The device identifier (Device Number) 122 is defined as a 31-bit value unique to each device. The device key 121 and the device identifier (Device Number) 122 are information applied to the process (decryption) of the MKB 111 recorded on the medium 110.

  First, in step S11, the recording device 120 executes an MKB update process. The recording device 120 can store the MKB in its own memory. The MKB is updated according to the revocation status of the device, and version information is given to each MKB. In step S11, the recording device 120 performs a version comparison between the MKB stored in its own memory and the MKB 111 recorded on the medium 110. When the MKB 111 recorded on the medium 110 is a new version, Then, the MKB update process for replacing the MKB recorded in the memory of the own device is executed.

  Next, the recording device 120 applies the device key 121 and the device identifier (Device Number) 122 stored in the memory of the device itself, executes the MKB process (decryption), and acquires the media key [Km]. . If the recording device 120 is revoked, the media key cannot be obtained from the MKB, and the media key can be obtained only if the recording device 120 is not revoked.

  Next, in step S <b> 13, the recording device 120 reads the media ID 112, which is a unique identifier recorded on the media 110, and uses, for example, a random number generated as an encryption key for content to be recorded on the media 110. The key [Kt] 123 is applied to generate a MAC value of the media ID, and this is recorded on the medium 110 as the MAC verification value 113. As described above, the media ID 112 recorded on the media 110 is 128-bit data recorded in accordance with AACS regulations, and the title key is also 128-bit data.

  Next, in step S14, the recording apparatus 120 executes an encryption key generation process (AES-G) using the media key [Km] acquired from the MKB and the binding nonce 114 read from the medium 110 to execute an encryption key ( Kpa) is generated. AES-G indicates a key generation algorithm using a one-way function according to the AES algorithm.

  Further, in steps S15 to S16, the recording device 120 encrypts the title key 123, generates a unit key file 115 storing the encrypted title key, and records it on the medium 110. First, in step S15, hash value calculation (AES-H) of the usage control information 124 corresponding to the content to be recorded on the medium 110 is executed, exclusive OR (XOR) with the title key 123 is performed, and step S16. , Encryption using the encryption key (Kpa) is executed to generate an encrypted title key [Kte], which is encrypted data of the title key, and a unit key file 115 storing this is recorded on the medium 110.

That is, the encrypted title key [Kte] is calculated by the following formula.
Kte = AES-E [Kpa, Kt (XOR) (AES-H (Usage Rule))]
In the above equation, AES-E (a, b) indicates an encryption process by the AES algorithm for data b to which the key a is applied,
AES-H (Usage Rule) is a hash value calculation process according to the AES algorithm for usage control information (Usage Rule).
a (XOR) b represents an exclusive OR operation of a and b.

  The usage control information 124 is usage control information corresponding to the recorded content, and is provided from, for example, a content management server. The recording device 120 also records this usage control information 124 on the medium 110.

  Further, in step S17, the recording device 120 applies the title key 123 to execute the encryption process of the content 125, and records it on the medium 110 as the encrypted content 117.

[Content playback processing]
Next, playback processing of the encrypted content 117 recorded on the medium 110 executed by the playback device 130 will be described. Similar to the recording device 110, the playback device 130 is also an AACS compatible device, and stores a device key (Kd) 131 and a device identifier (Device Number) 132 in a memory.

  First, in step S21, the playback device 130 executes the MKB process (decryption) by applying the device key 131 and the device identifier (Device Number) 132 stored in its own memory, and performs the media key [Km]. To get. If the playback device 130 is revoked, the media key cannot be obtained from the MKB, and the media key is successfully obtained only when the playback device 130 is not revoked.

  Next, in step S22, the playback device 130 executes encryption key generation processing (AES-G) using the media key [Km] acquired from the MKB and the binding nonce 114 read from the medium 110 to execute the encryption key ( Kpa) is generated. AES-G indicates a key generation algorithm using a one-way function according to the AES algorithm.

  Furthermore, the playback device 130 performs title key generation processing in steps S23 to S24. First, in step S23, the unit key file 115 storing the encrypted title key [Kte] is read from the medium, and decryption processing using the encryption key (Kpa) is executed. Next, in step S24, the hash value calculation (AES-H) of the usage control information 116 read from the medium 110 is executed, and the exclusive OR of the hash value calculation (AES-H) result and the decryption result in step S23 is executed. The title key [Kt] is acquired by executing the calculation.

That is,
Kt = [AES-D (Kpa, Kte)] (XOR) [AES-H (Usage Rule)]
The title key [Kt] is obtained according to the above formula.
In the above equation, AES-D (a, b) indicates the decryption process by the AES algorithm of data b to which the key a is applied,
AES-H (Usage Rule) is a hash value calculation process according to the AES algorithm for usage control information (Usage Rule).
a (XOR) b represents an exclusive OR operation of a and b.

  Next, in step S25, the playback device 130 reads the media ID 112, which is a unique identifier recorded on the media 110, and applies the generated title key [Kt] to generate the MAC value of the media ID. In step S16, a MAC verification process for comparing the generated MAC value with the MAC verification value 113 read from the medium 110 is executed. If both MAC values are equal, it is confirmed that the media ID is the correct media ID and the generated title key is also the correct title key. On the condition that the MAC verification is established, in step S27, decryption processing of the encrypted content 117 to which the title key is applied is started.

  The content 133 is acquired by the decryption process of the encrypted content 117 to which the title key is applied in step S27, and the reproduction process is performed.

(1.2. Use of DVD + R or DVD + RW in accordance with an embodiment of the present invention)
Next, a plurality of embodiments of the DVD + R or DVD + RW usage process according to an embodiment of the present invention will be described. As described above, according to the AACS rules, a media ID corresponding to a 128-bit medium must be recorded on an AACS-compatible medium.
(A) Content recording processing for media by a recording device;
(B) Content playback processing from media by playback device In any of the above processing, it is indispensable in the AACS-defined content recording and playback sequence to perform processing using a media ID. This is as described with reference to FIG.

However, although a 128-bit media ID is recorded on the AACS compatible media, as described above, the media ID is not defined for DVD + R and DVD + RW, and the disc is not compatible with AACS. . The embodiment described below is a configuration example that enables recording and playback of content in accordance with AACS regulations as a configuration for recording a 128-bit media ID similar to that of AACS-compatible media for DVD + R and DVD + RW. . Hereinafter, as an example,
(A) Processing example for generating, recording, and using a media ID using a counter (B) Processing example for generating, recording, and using a media ID using a random number These embodiments will be described.

(A) Example of processing for generating, recording and using a media ID using a counter First, in a DVD + R or DVD + RW media usage configuration, a 128-bit media ID is generated using a counter, recorded on the media, and used. A processing example will be described with reference to FIG.

  In FIG. 2, a central medium (information recording medium) 210 is a DVD + R or DVD + RW medium, and is originally a medium on which a 128-bit media ID corresponding to the AACS standard is not recorded. The left side is an AACS compatible recording device 220 that executes content recording processing on the medium 210 according to the recording sequence according to the AACS standard, and the right side is content playback processing based on the playback sequence according to the AACS standard. This is an AACS-compatible playback device 230.

  2, the same reference numerals as those in FIG. 1 are set for the same data and processing steps as those in FIG. 1, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. 1. Description is omitted. In the present embodiment, the recording device 220 generates 128-bit unique data and records the generated unique data on the medium (+ RW / + R) 210 as the media ID 211.

  A recording apparatus 220 shown in FIG. 2 is an AACS-compliant recording apparatus, and as described above with reference to FIG. 1, a device key (Kd) 121 unique to the apparatus and a device identifier (Device) are used for MKB processing. (Number) 122. The device identifier (Device Number) 122 is defined as a 31-bit value unique to each device.

  In this embodiment, the recording apparatus 220 has a counter 221. The counter 221 is a counter that increases by one each time the recording device 220 records the media ID on the medium 210. The counter value is recorded in a non-volatile memory such as a flash memory, for example, regardless of whether the power is on or off. The counter value is held in the memory. When recording a new media ID, the latest counter value is read from the memory, and a counter value increment process is performed to set the latest counter value to (+1).

  In step S <b> 101, the recording apparatus 220 generates 128-bit unique data using the counter value generated by the counter 221 and the device identifier (Device Number) 122.

  As described above, the device identifier (Device Number) 122 is defined as a 31-bit device-specific value. Therefore, for example, the counter 221 generates a counter value corresponding to the insufficient bit data necessary for constructing the 128-bit media ID for each recording of the media ID, and concatenates these bits in step S101. Then, a media ID composed of 128-bit unique data defined in AACS is generated.

  In step S <b> 101, the recording apparatus 220 generates 128-bit unique data using the counter value generated by the counter 221 and the device identifier (Device Number) 122.

As described above, the device identifier (Device Number) 122 is defined as a 31-bit value unique to each device. Therefore, for example, the counter 221 generates 97-bit different counter values for each recording of the media ID, and concatenates these bits in step S101, thereby generating 128-bit unique data. The recording device 220 of this embodiment records the 128-bit unique data generated in this way on the medium 210 as the medium ID 211. That is,
[Media ID (128 bits)] = [Device identifier (31 bits)] ‖ [Counter value (97 bits)]
A 128-bit media ID 211 is generated by the above formula and recorded on the media 210.

In the above processing example, all 97 bits, which are the difference between the 128-bit media ID and the 31-bit device identifier, are set as the counter value, but other data may be combined. For example, 128 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the counter 121 is (97−n) bits. That is,
[Media ID (128 bits)] = [Device identifier (31 bits)] ‖ [Counter value (97-nbit)] ‖ [Other ID (nbit)]
A 128-bit media ID 211 may be generated by the above formula and recorded on the media 210.

The recording timing and recording area of the media ID in the recording device 220 are as follows.
(A) For DVD + RW media,
At the time of formatting, the data is recorded in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(B) For DVD + R media,
At the time of the first recording on the blank disc, recording is performed in the sector header (RSV) of the second buffer zone (for example, lead-in zone / buffer zone 2) of the data recording area of the medium.

  A specific recording configuration of the medium 210 with the medium ID 211 will be described later. The other processing of the recording device 220 and the processing of the playback device 230 are the same as the processing using the AACS compatible disc described above with reference to FIG. As described above, in this processing example, since the 31-bit device identifier and the counter value or other ID are added to generate 128-bit unique data and recorded on the DVD + R or DVD + RW medium, the DVD + R or DVD + R or Using DVD + RW media, it is possible to perform content recording / playback processing in accordance with a sequence defined by AACS similar to an AACS compatible disc.

(B) Processing example of generating, recording, and using a media ID using a random number Next, in a configuration for using DVD + R or DVD + RW media, a 128-bit media ID is generated using a random number, recorded on the medium, and used. An example of processing to be performed will be described with reference to FIG.

  In FIG. 3, a central medium (information recording medium) 250 is a DVD + R or DVD + RW medium, and is originally a medium on which a 128-bit media ID corresponding to the AACS standard is not recorded. The left side is an AACS compatible recording device 260 that performs content recording processing on the medium 250 according to the recording sequence according to the AACS standard, and the right side is content playback processing based on the playback sequence according to the AACS standard. This is an AACS compatible playback device 270.

  3, the same reference numerals as those in FIG. 1 are set for the same data and processing steps as those in FIG. 1, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. Description is omitted. Also in the present embodiment, the recording device 260 generates 128-bit unique data, and records the generated unique data on the medium (+ RW / + R) 250 as the media ID 251.

  A recording apparatus 260 shown in FIG. 3 is an AACS-compliant recording apparatus, and as described above with reference to FIG. 1, an apparatus-specific device key (Kd) 121, device identifier (Device) for MKB processing are provided. (Number) 122. The device identifier (Device Number) 122 is defined as a 31-bit value unique to each device.

  In the present embodiment, the recording device 260 includes a random number generation unit (RNG) 261. The random number generation unit 261 is a random number generation unit that generates a new random number every time the recording device 260 records a media ID on the medium 250, and is a random number generation unit that executes a pseudo random number generation process or a true random number generation process. .

  In step S <b> 121, the recording apparatus 220 generates 128-bit unique data using the random number generated by the random number generation unit 261 and the device identifier (Device Number) 122.

As described above, the device identifier (Device Number) 122 is defined as a 31-bit value unique to each device. Therefore, for example, the random number generation unit 261 generates 97-bit different random numbers for each recording of the media ID, and concatenates these bits in step S121 to generate 128-bit unique data. The recording device 260 of this embodiment records the 128-bit unique data generated in this way on the medium 250 as the medium ID 251. That is,
[Media ID (128 bits)] = [Device identifier (31 bits)] ‖ [Random number (97 bits)]
A 128-bit media ID 251 is generated by the above formula and recorded on the media 250.

In the above processing example, all the 97 bits, which are the differences between the 128-bit media ID and the 31-bit device identifier, are set as random values. However, as in the above example, other data is combined. Also good. For example, 128 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the random number generation unit 261 is (97−n) bits. That is,
[Media ID (128 bits)] = [Device identifier (31 bits)] ‖ [Random number (97-nbit)] ‖ [Other ID (nbit)]
A 128-bit media ID 251 may be generated by the above formula and recorded on the media 250.

The recording timing and recording area of the media ID in the recording device 260 are the same as in the above example, and are as follows.
(A) For DVD + RW media,
At the time of formatting, the data is recorded in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(B) For DVD + R media,
At the time of the first recording on the blank disc, recording is performed in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).

  A specific recording configuration in the medium 250 with the medium ID 251 will be described later. The processing of the other recording device 260 and the processing of the playback device 270 are the same as the processing using the AACS compatible disc described above with reference to FIG. As described above, in the present processing example, since the 128-bit unique data is generated by adding the 31-bit device identifier and the random number or other ID and is recorded on the DVD + R or DVD + RW medium, the DVD + R or DVD + RW is recorded. Using the medium, it is possible to perform content recording and reproduction processing according to a sequence defined by AACS similar to an AACS compatible disc.

(1.3. Utilization Processing of DVD-R, DVD-RW, DVD-RAM According to One Embodiment of the Present Invention)
Next, a plurality of embodiments will be described regarding the use processing of the DVD-R, DVD-RW, or DVD-RAM according to one embodiment of the present invention. As described above, according to the AACS rules, a media ID corresponding to a 128-bit medium must be recorded on an AACS-compatible medium.
(A) Content recording processing for media by a recording device;
(B) Content playback processing from media by playback device In any of the above processing, it is indispensable in the AACS-defined content recording and playback sequence to perform processing using a media ID. This is as described with reference to FIG.

However, although a 128-bit media ID is recorded on an AACS-compatible medium, DVD-R, DVD-RW, and DVD-RAM, as described above, use NBCA (Narrow Burst) as a burst cutting area. Cutting Area) and BCA (Burst Cutting Area) are defined, and a 64-bit media ID is recorded in BCA. Therefore, the disk does not have a 128-bit ID defined in AACS and does not support AACS. In the embodiment described below, the recording and playback of content in accordance with the AACS standard is performed on DVD-R, DVD-RW, and DVD-RAM as a configuration in which a 128-bit media ID similar to that of AACS-compatible media is recorded. This is a configuration example that can be executed. Hereinafter, as an example,
(A) Processing example for generating, recording, and using a media ID using a counter (B) Processing example for generating, recording, and using a media ID using a random number These embodiments will be described.

(A) Example of processing for generating, recording, and using a media ID using a counter First, in a configuration for using DVD-R, DVD-RW, or DVD-RAM media, a write-once media ID is generated using a counter, An example of processing recorded and used on a medium will be described with reference to FIG.

  In FIG. 4, a central medium (information recording medium) 310 is a DVD-R, DVD-RW, or DVD-RAM medium, and a 64-bit recorded medium ID 312 is recorded in the BCA, which corresponds to the AACS standard. This is a medium in which a 128-bit media ID is not recorded. The left side is an AACS-compatible recording device 320 that performs content recording processing on the medium 310 according to a recording sequence that complies with the AACS standard, and the right side is that content recorded on the medium 310 is subjected to content reproduction processing by a reproduction sequence that conforms to the AACS standard. This is an AACS-compatible playback device 330.

  4, the same reference numerals as those in FIG. 1 are set for the same data and processing steps as those in FIG. 1, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. Description is omitted. In the present embodiment, the recording device 320 generates 64-bit unique data, records it as the additional recording medium ID 311 on the medium 310, and combines the 64-bit recorded medium ID 312 recorded on the medium 310 with the AACS standard. This configuration is used as a 128-bit media ID.

  A recording device 320 shown in FIG. 4 is an AACS-compliant recording device, and as described above with reference to FIG. 1, a device key (Kd) 121, a device identifier (Device) unique to the device for MKB processing. (Number) 122. The device identifier (Device Number) 122 is defined as a 31-bit value unique to each device.

  In this embodiment, the recording device 320 includes a counter 321. The counter 321 is a counter that increases by one each time the recording device 320 records the additional recording medium ID on the medium 310. The counter value is recorded in a non-volatile memory such as a flash memory, and the power is turned on / off. Regardless, the counter value is held in the memory. When recording a new media ID, the latest counter value is read from the memory, and a counter value increment process is performed to set the latest counter value to (+1).

  In step S 151, the recording device 320 generates 64-bit unique data using the counter value generated by the counter 321 and the device identifier (Device Number) 122.

As described above, the device identifier (Device Number) 122 is defined as a 31-bit value unique to each device. Therefore, for example, the counter 221 generates a different 33-bit counter value for each recording of the additional recording medium ID, and concatenates these bits in step S151, thereby generating 64-bit unique data. The recording device 320 of this embodiment records the 64-bit unique data generated in this way on the medium 310 as the additional recording medium ID 311. That is,
[Additional media ID (64 bits)] = [Device identifier (31 bits)] ‖ [Counter value (33 bits)]
A 64-bit additional recording medium ID 311 is generated by the above formula and recorded on the medium 310.

When recording and playback processing of content media in accordance with AACS regulations is performed, the 64-bit additional recording media ID 311 and the 64-bit recorded media ID 312 recorded from the beginning of the media 310 are concatenated to 128 bits. This 128-bit data is used as an AACS compatible media ID. That is,
AACS specified media ID (128 bits) = [appendable media ID (64 bits)] || [recorded media ID (64 bits)]
According to the above formula, two 64-bit IDs are concatenated to generate 128-bit data, which is used as a 128-bit AACS compatible media ID.

  In step S152 shown in FIG. 4, the recording device 320 concatenates the 64-bit additional recording medium ID 311 and the 64-bit recorded medium ID 312 to generate 128-bit data. The process of using the 128-bit media ID in the subsequent content recording process is the same as the process described above with reference to FIG.

  On the other hand, in step S161 shown in FIG. 4, the playback device 330 concatenates the 64-bit additional recording medium ID 311 and the 64-bit recorded media ID 312 to generate 128-bit data. The processing for using the 128-bit media ID in the subsequent content reproduction processing is the same as the processing described above with reference to FIG.

In the above processing example, all 33 bits, which are the differences between the 64-bit recordable media ID and the 31-bit device identifier, are set as counter values, but other data may be combined. For example, 64 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the counter 321 is (33-n) bits. That is,
[Additional Media ID (64 bits)] = [Device Identifier (31 bits)] ‖ [Counter Value (33-nbit)] ‖ [Other ID (nbit)]
A 64-bit additional recording medium ID 311 may be generated by the above formula and recorded on the medium 310.

The recording timing and recording area of the media ID in the recording device 320 are as follows.
(A) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(B) For DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

  A specific recording configuration of the additional recording medium ID 311 on the medium 310 will be described later. The other processing of the recording device 320 and the processing of the playback device 330 are the same as the processing using the AACS compatible disc described above with reference to FIG. As described above, in this processing example, a 31-bit device identifier and a counter value or other ID is added to generate 64-bit unique data, which is recorded on the medium as a write-once media ID, and complies with the AACS regulations. In the recording / reproducing process, a 64-bit recorded media ID recorded on the media and a 64-bit additional recording media ID are connected to generate and use a 128-bit media ID corresponding to the AACS standard. Therefore, it is possible to perform content recording and reproduction processing in accordance with the sequence defined by AACS similar to the AACS compatible disc using DVD-R, DVD-RW, or DVD-RAM media.

(B) Processing example of generating, recording, and using a media ID using a random number Next, in a configuration of using a DVD-R, DVD-RW, or DVD-RAM medium, a write-once media ID is generated using a random number. An example of processing recorded on a medium and used will be described with reference to FIG.

  In FIG. 5, a central medium (information recording medium) 350 is a DVD-R, DVD-RW, or DVD-RAM medium, and a 64-bit recorded medium ID 312 is recorded in the BCA, which corresponds to the AACS standard. This is a medium in which a 128-bit media ID is not recorded. The left side is an AACS-compliant recording device 350 that executes content recording processing on the medium 350 according to a recording sequence that complies with the AACS rules, and the right side is that content recorded on the media 350 is played back according to a playback sequence that complies with the AACS rules. This is an AACS compatible playback device 370.

  5, the same reference numerals as those in FIG. 1 are set for the same data and processing steps as those in FIG. 1, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. Description is omitted. Also in the present embodiment, the recording device 360 generates 64-bit unique data, records it as the additional recording medium ID 351 on the medium 350, and combines with the 64-bit recorded medium ID 352 recorded on the medium 350. This configuration is used as a 128-bit media ID.

  A recording apparatus 360 shown in FIG. 5 is an AACS-compliant recording apparatus, and as described above with reference to FIG. 1, an apparatus-specific device key (Kd) 121, device identifier (Device) for MKB processing are provided. (Number) 122. The device identifier (Device Number) 122 is defined as a 31-bit value unique to each device.

  In this embodiment, the recording device 360 includes a random number generation unit (RNG) 361. The random number generation unit 361 is a random number generation unit that generates a new random number every time the recording device 360 records a write-once medium ID on the medium 350, and is a random number generation unit that executes a pseudo random number generation process or a true random number generation process. is there.

  In step S171, the recording device 320 uses the random number generated by the random number generation unit 361 and the device identifier (Device Number) 322 to generate 64-bit unique data.

As described above, the device identifier (Device Number) 122 is defined as a 31-bit value unique to each device. Therefore, for example, the random number generation unit 361 can generate different random numbers of 33 bits for each recording of the write-once media ID and concatenate these bits in step S171 to generate 64-bit unique data. The recording device 360 of this embodiment records the 64-bit unique data generated in this way on the medium 350 as the additional recording medium ID 351. That is,
[Additional media ID (64 bits)] = [Device identifier (31 bits)] ‖ [Random number (33 bits)]
A 64-bit additional recording medium ID 351 is generated by the above formula and recorded on the medium 350.

When recording and playback processing of content media in accordance with AACS regulations is performed, the 64-bit additional recording media ID 351 and the 64-bit recorded media ID 352 recorded from the beginning of the media 350 are concatenated to 128 bits. This 128-bit data is used as an AACS compatible media ID. That is,
AACS specified media ID (128 bits) = [appendable media ID (64 bits)] || [recorded media ID (64 bits)]
According to the above formula, two 64-bit IDs are concatenated to generate 128-bit data, which is used as a 128-bit AACS compatible media ID.

  In step S172 shown in FIG. 5, the recording device 360 concatenates the 64-bit recordable media ID 351 and the 64-bit recorded media ID 352 to generate 128-bit data. The process of using the 128-bit media ID in the subsequent content recording process is the same as the process described above with reference to FIG.

  On the other hand, in step S181 shown in FIG. 5, the playback device 370 concatenates the 64-bit recordable media ID 351 and the 64-bit recorded media ID 352 to generate 128-bit data. The processing for using the 128-bit media ID in the subsequent content reproduction processing is the same as the processing described above with reference to FIG.

In the above processing example, all 33 bits, which are the difference between the 64-bit recordable media ID and the 31-bit device identifier, are set as random numbers. However, as in the above example, other data is combined. It is good. For example, 64 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the random number generation unit 361 is (33-n) bits. That is,
[Additional Media ID (64 bits)] = [Device Identifier (31 bits)] ‖ [Random Number (33-nbit)] ‖ [Other ID (nbit)]
A 64-bit additional recording medium ID 351 may be generated by the above formula and recorded on the medium 350.

The recording timing and recording area of the media ID in the recording device 360 are the same as in the above example, and are as follows.
(A) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(B) For DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

  A specific recording configuration of the additional recording medium ID 351 with respect to the medium 350 will be described later. The other processing of the recording device 360 and the processing of the playback device 370 are the same as the processing using the AACS compatible disc described above with reference to FIG. In this way, in this processing example, a 31-bit device identifier and a random number or other ID are added to generate 64-bit unique data, which is recorded on the medium as a write-once media ID, and complies with the AACS regulations. In the recording / playback processing, a configuration is used in which a 64-bit recorded media ID recorded on a medium and a 64-bit additional recording media ID are linked to generate and use a 128-bit media ID corresponding to the AACS standard. Therefore, it becomes possible to perform content recording and reproduction processing in accordance with the sequence defined by AACS similar to the AACS compatible disc, using DVD-R, DVD-RW, or DVD-RAM media.

[2. Content Recording / Playback Processing Configuration Using Recording / Playback Device such as PC Connected with Drive Device]
Next, a content recording / playback processing configuration using a recording / playback device such as a PC to which a drive device is connected will be described. First, content recording and playback processing according to the AACS rules will be described with reference to FIG.
[DVD + R or DVD + RW utilization process according to an embodiment of the present invention], and
[Usage processing of DVD-R, DVD-RW, DVD-RAM according to one embodiment of the present invention]
These processes will be described sequentially.

(2.1. Content recording and playback processing in accordance with AACS regulations)
A sequence in the case of performing a content recording and reproduction process in accordance with ACSS (Advanced Access Content System) specifications using a recording / reproduction device such as a PC connected to a drive device will be described with reference to FIG.

  In FIG. 6, the leftmost medium (information recording medium) 410 is a data recordable medium 410 corresponding to the AACS standard. Specifically, as described above, the medium 410 has a 128-bit media ID recorded in the burst cutting area (BCA). The drive 420 on the right side of the medium 410 is a drive 420 that executes access to the medium 410 to record data on the medium 410 and read data from the medium, and is a drive device that complies with AACS regulations. The host 430 at the left end is a host 430 that complies with AACS rules for performing data recording to the medium 410 and data reading from the medium via the drive 420 by communication with the drive 420. The host 430 is configured by a device such as a PC, for example, and executes a content recording / playback application program in accordance with AACS regulations.

  First, the recording information of the AACS compatible medium 410 will be described. As shown in the figure, the media 410 includes an MKB (Media Key Block) 411, a drive revocation list (DRL) 412, a host revocation list (HRL) 413, a media ID (media identifier) 414, and encrypted content 415. To be recorded. Although not shown in the figure, the MAC verification value, binding nonce, unit key file, usage control information (Usage Rule), etc., which are the media recording data described above with reference to FIG. 1, are also recorded. However, the use process of these data is the same as the process in the recording / reproducing apparatus in which the drive apparatus described with reference to FIGS. .

(1) MKB (Media Key Block)
The MKB (Media Key Block) 411 is an encryption information (encryption key) block generated based on a tree-structured key distribution method known as one aspect of the broadcast encryption method, as described above. The MKB 111 can acquire the media key [Km], which is a key necessary for decrypting the content, only by processing (decryption) based on the device key [Kd] stored in the information processing apparatus of the user having a valid license. It is a cryptographic information block.

(2) Drive revocation list (DRL)
The drive revocation list (DRL) 412 is a list in which identification information about a drive determined by the AACS management center as an unauthorized drive device is recorded, that is, a black list. For example, the identification number of the drive public key certificate corresponding to the drive is recorded as drive identification information. A signature by the secret key of the AACS management center is given so as not to be tampered with.

(3) Host revocation list (HRL)
The host revocation list (HRL) 413 is a list in which identification information about hosts determined by the AACS management center as unauthorized hosts is recorded, that is, a black list. For example, the identification number of the host public key certificate corresponding to the host is recorded as the host identification information. A signature by the secret key of the AACS management center is given so as not to be tampered with.

(4) Media ID
The media ID 414 is identification information (ID) unique to the medium (information recording medium) as described above. AACS-compliant media such as Blu-ray Disc (registered trademark) Recordable, Blu-ray Disc (registered trademark) Rewritable, etc. define a burst cutting area (BCA) as a physical standard. A 128-bit media ID is recorded. The media ID is set as data that can be recorded only by a specific licensed media manufacturer. When data recording / reproduction according to the AACS regulations is performed, the media ID is read from the media 410 and a predetermined process such as a confirmation process is performed. It is essential to do.

(5) Encrypted Content The encrypted content 415 is content recorded in accordance with the AACS standard, as described above, and is an AV of moving image content such as HD (High Definition) movie content that is high-definition moving image data. (Audio Visual) Content that includes a stream. This content is stored according to a specific AV data format. In order to realize different usage control for each divided content, a different key for each divided content, that is, the above-described title key (also referred to as a CPS unit key or unit key) is assigned and encrypted. A unit to which one title key is assigned is called a content management unit (CPS unit).

[Content recording / playback processing]
Next, a sequence in the case where the host 430 reads data from the medium 410 via the drive 420 and records or reproduces content will be described. The host 430 shown in FIG. 6 has an encryption processing unit 437. In the encryption processing unit 437, the recording device 120 described above with reference to FIG. A similar process is executed. Further, in the reproduction process of the content from the medium 410, the same process as the reproduction apparatus 130 described above with reference to FIG. 1 is executed.

  The host 430 and the drive 420 execute authentication and key sharing processing (steps S51 and S61) between the host and the drive shown in FIG. 6 as processing start conditions in the encryption processing unit 437. In these processing, the host 430 and the drive The MAC generation and the MAC verification for the media ID recorded on the medium 410 by applying the bus key (Kb) shared in 420 are executed in the drive 420 and the host 430, respectively, on condition that the MAC verification is established. In the encryption processing unit 437, content recording or reproduction processing is performed.

  The authentication and key sharing process (steps S51 and S61) between the host and the drive shown in FIG. 6 will be described. This authentication and key sharing process executes an authentication and key sharing process sequence defined by AACS. The main processes executed by each device in this process are as follows.

  The drive 420 reads the host revocation list (HRL) 412 from the medium 410, applies the AACS management center public key 421, verifies the signature of the host revocation list (HRL) 412, and confirms that there is no falsification. It is confirmed that the host 430 identification information is not described in the host revocation list (HRL) 412, that is, the host 430 is not revoked.

  The host 430 acquires the drive revocation list (DRL) 413 from the medium 410 via the drive 420, applies the AACS management center public key 433, verifies the signature of the drive revocation list (DRL) 413, and performs falsification. It is confirmed that the identification information of the drive 420 is not described in the drive revocation list (DRL) 413, that is, the drive 420 is not revoked.

  When it is confirmed that neither the drive 420 nor the host 430 has been revoked, the encrypted data is communicated between the drive 420 and the host 430 in accordance with the AACS standard, and the bus key is used as shared secret data between the both. Share (Kb). In this process, the drive secret key 422, the drive public key certificate 423, the host secret key 434, and the host public key certificate 435 are used.

  When the authentication and key sharing process (steps S51 and S61) between the host and the drive is completed, the drive 420 reads the medium ID 411 from the medium 410, executes the MAC generation process to which the bus key (Kb) is applied, and generates the generated MAC. The value and the media ID are transmitted to the host 430. In step S62, the host 430 executes a MAC verification process using the bus key (Kb). That is, a MAC generation process using the bus key (Kb) is performed on the media ID received from the drive 420, and the generated MAC value and the MAC value received from the drive 420 are collated. If the two MAC values match, it is determined that the verification is successful, and the encryption processing unit 437 executes content recording or reproduction processing according to the AACS rules. The content recording or playback processing sequence in accordance with the AACS rules executed in the encryption processing unit 437 is substantially the same as the processing described above with reference to FIG. The host 430 holds a device key (Kd) 431 and a device identifier 432 in a memory, and executes content recording or reproduction processing according to a sequence defined by AACS by applying these pieces of information.

  As described above, when the host reads data from the medium via the drive and records or reproduces the content, authentication and key sharing between the host and the drive are performed, and the authentication is established and the key is established. Successful sharing is an execution condition for recording and reproducing content. In addition, a condition for starting recording / reproduction of content is that the MAC generation and verification processing is performed for the media ID using the shared key (bus key (Kb)) and the verification is established. In the AACS standard, it is an essential requirement to use a medium in which a 128-bit media ID is recorded.

  In the present invention, it is possible to execute the same processing as that of an AACS compatible disc even on a medium in which a 128-bit media ID is not recorded. Examples of the present invention will be described below.

(2.2. Use of DVD + R or DVD + RW in accordance with an embodiment of the present invention)
Next, an embodiment in which the use of DVD + R or DVD + RW in the host drive configuration can be executed in accordance with a sequence defined by AACS will be described. A 128-bit media ID is recorded on an AACS-compatible medium, but DVD + R and DVD + RW are discs that do not define a media ID and do not support AACS as described above. The embodiment described below is a configuration example that enables recording and playback of content in accordance with AACS regulations as a configuration for recording a 128-bit media ID similar to that of AACS-compatible media for DVD + R and DVD + RW. . Hereinafter, as an example,
(A) Processing example for generating, recording, and using a media ID using a counter (B) Processing example for generating, recording, and using a media ID using a random number These embodiments will be described.

(A) Example of processing for generating, recording, and using a media ID using a counter First, in a DVD + R or DVD + RW media usage configuration, a 128-bit media ID is generated using a counter, recorded on the media, and used. A processing example will be described with reference to FIG.

  In FIG. 7, the leftmost medium (information recording medium) 510 is a DVD + R or DVD + RW medium, and is originally a medium on which a 128-bit media ID corresponding to the AACS standard is not recorded. A drive 520 as an access device of the medium 510 is shown at the center, and a host 530 that executes content recording / playback processing via the drive 520 is shown at the right end. Both the drive 520 and the host 530 are AACS compatible devices.

  7, the same reference numerals as those in FIG. 6 are set for the same data and processing steps as those in FIG. 6, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. 6. Description is omitted. In this embodiment, the drive 520 generates unique data of 128 bits and records the generated unique data on the medium (+ RW / + R) 510 as the media ID 511.

  In this embodiment, the drive 520 has a counter 521. The counter 521 is a counter that is incremented by one every time the drive 520 records the media ID on the medium 510. The counter value is recorded in a non-volatile memory such as a flash memory, for example, regardless of whether the power is on or off. The value is held in memory. When recording a new media ID, the latest counter value is read from the memory, and a counter value increment process is performed to set the latest counter value to (+1).

  Further, the drive 520 shown in FIG. 7 stores and holds the drive public key certificate 423 in the memory. The data structure of the drive public key certificate 423 is shown in FIG. As shown in FIG. 8, each data of a certificate type, a data length, a drive ID, a drive public key, and a signature is recorded in the drive public key certificate. The signature is a signature made with the private key of the AACS management center. After the validity of the drive public key certificate 423 is determined by signature verification using the AACS public key, the stored data is used.

  As shown in FIG. 7, the drive 520 extracts the drive ID from the drive public key certificate 423. This drive ID is 6 bytes, that is, 48-bit data, and is identification information unique to the drive.

In step S201, the drive 520 concatenates the drive ID of the 48-bit data and the 80-bit data generated by the counter 521 to generate 128-bit unique data. Recorded in the medium 510 as the medium ID 511. That is,
[Media ID (128 bits)] = [Drive ID (48 bits)] ‖ [Counter value (80 bits)]
Note that (a || b) means connection of a and b.
A 128-bit media ID 511 is generated by the above formula and recorded on the media 510.

In the above processing example, all 80 bits, which are the differences between the 128-bit media ID and the 48-bit drive ID, are set as counter values. However, other data may be combined. For example, 128 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the counter 521 is (80−n) bits. That is,
[Media ID (128 bits)] = [Drive ID (48 bits)] ‖ [Counter Value (80-nbit)] ‖ [Other ID (nbit)]
A 128-bit media ID 511 may be generated by the above formula and recorded on the media 510.

The recording timing and recording area of the media ID in the drive 520 are as follows.
(A) For DVD + RW media,
At the time of formatting, the data is recorded in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(B) For DVD + R media,
At the time of the first recording on the blank disc, recording is performed in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).

  A specific recording configuration of the medium 510 with the medium ID 511 will be described later. The other processing of the drive 520 and the processing of the host 530 are the same as the processing using the AACS compatible disk described above with reference to FIG. As described above, in this processing example, the 48-bit drive ID acquired from the drive public key certificate and the counter value, or other IDs are added to generate 128-bit unique data and recorded on the DVD + R or DVD + RW medium. Therefore, it is possible to perform content recording and reproduction processing according to the sequence defined by AACS, similar to an AACS compatible disc, using DVD + R or DVD + RW media.

(B) Example of processing for generating, recording, and using a media ID using random numbers Next, in a usage configuration of DVD + R or DVD + RW media, a 128-bit media ID is generated using random numbers, recorded on the media, and used. An example of the processing will be described with reference to FIG.

  In FIG. 9, the leftmost medium (information recording medium) 550 is a DVD + R or DVD + RW medium, and is originally a medium on which a 128-bit media ID corresponding to the AACS standard is not recorded. A drive 560 as an access device for the medium 550 is shown at the center, and a host 570 that executes content recording / playback processing via the drive 560 at the right end. Both the drive 560 and the host 570 are AACS compatible devices.

  9, the same reference numerals as those in FIG. 6 are set for the same data and processing steps as those in FIG. 6, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. Description is omitted. In this embodiment, the drive 560 generates 128-bit unique data, and records the generated unique data on the medium (+ RW / + R) 550 as the media ID 551.

  In the present embodiment, the drive 560 includes a random number generation unit (RNG) 561. The random number generation unit 561 is a random number generation unit that generates a new random number every time the drive 560 records a media ID on the medium 550, and is a random number generation unit that executes a pseudo random number generation process or a true random number generation process.

  The drive 560 shown in FIG. 9 stores and holds the drive public key certificate 423 in the memory. The drive public key certificate 423 stores a 48-bit drive ID as described above with reference to FIG. That is, identification information unique to the drive of 48-bit data.

The drive 560 determines the validity by verifying the signature of the drive public key certificate 423 and then acquires the stored drive ID. In step S211, the random number (80 bits) generated by the random number generation unit 561 and 48 bits 128-bit unique data is generated by concatenating these drive IDs, and the generated data is recorded on the medium 550 as a 128-bit media ID 551 in accordance with the AACS standard. That is,
[Media ID (128 bits)] = [Drive ID (48 bits)] ‖ [Random number (80 bits)]
A 128-bit media ID 511 is generated by the above formula and recorded on the media 510.

In the above processing example, all 80 bits, which are the differences between the 128-bit media ID and the 48-bit drive ID, are set as random values. However, as in the above example, other data is combined. Also good. For example, 128 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the random number generation unit 561 is (80−n) bits. That is,
[Media ID (128 bits)] = [Drive ID (48 bits)] ‖ [Random number (80-nbit)] ‖ [Other ID (nbit)]
A 128-bit media ID 551 may be generated by the above formula and recorded on the media 550.

The recording timing and recording area of the media ID in the drive 560 are the same as in the above example, and are as follows.
(A) For DVD + RW media,
At the time of formatting, the data is recorded in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(B) For DVD + R media,
At the time of the first recording on the blank disc, recording is performed in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).

  A specific recording configuration in the medium 550 having the medium ID 551 will be described later. The other processing of the drive 560 and the processing of the host 570 are the same as the processing using the AACS compatible disk described above with reference to FIG. As described above, in this processing example, a 48-bit drive ID and a random number obtained from the drive public key certificate and a random ID or other ID are added to generate 128-bit unique data and recorded on the DVD + R or DVD + RW medium. Since the configuration is adopted, it is possible to perform content recording and reproduction processing in accordance with a sequence defined by AACS similar to an AACS compatible disc using DVD + R or DVD + RW media.

(2.3. DVD-R, DVD-RW, and DVD-RAM usage processing according to an embodiment of the present invention)
Next, a plurality of embodiments will be described regarding the use processing of the DVD-R, DVD-RW, or DVD-RAM according to one embodiment of the present invention. As described above, according to the AACS regulations, media IDs that are unique identifiers of 128-bit media are recorded on AACS-compliant media, but DVD-R, DVD-RW, DVD-RAM As described above, NBCA (Narrow Burst Cutting Area) and BCA (Burst Cutting Area) are defined as burst cutting areas, and a 64-bit media ID is recorded in BCA. ing. Therefore, the disk does not have a 128-bit ID defined in AACS and does not support AACS. In the embodiment described below, the recording and playback of content in accordance with the AACS standard is performed on DVD-R, DVD-RW, and DVD-RAM as a configuration in which a 128-bit media ID similar to that of AACS-compatible media is recorded. This is a configuration example that can be executed. Hereinafter, as an example,
(A) Processing example for generating, recording, and using a media ID using a counter (B) Processing example for generating, recording, and using a media ID using a random number These embodiments will be described.

(A) Example of processing for generating, recording, and using a media ID using a counter First, in a media usage configuration of DVD-R, DVD-RW, and DVD-RAM, a 128-bit media ID is obtained using a counter. An example of processing that is generated, recorded on a medium, and used will be described with reference to FIG.

  In FIG. 10, the leftmost medium (information recording medium) 610 is a DVD-R, DVD-RW, or DVD-RAM medium, and a 64-bit recorded medium ID 612 is recorded in the BCA, which corresponds to the AACS standard. This is a medium in which a 128-bit media ID is not recorded. A drive 620 as an access device for the medium 610 is shown at the center, and a host 630 that executes content recording / playback processing via the drive 620 is shown at the right end. Both the drive 620 and the host 630 are AACS compatible devices.

  10, the same reference numerals as those in FIG. 6 are set for the same data and processing steps as those in FIG. 6, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. Description is omitted. In the present embodiment, the drive 620 generates 64-bit unique data, records it as a write-once medium ID 611 on the medium 610, and combines it with the 64-bit recorded media ID 612 recorded on the medium 610 in accordance with AACS standard 128. This configuration is used as a bit media ID.

  In this embodiment, the drive 620 has a counter 621. The counter 621 is a counter that is incremented by 1 every time the drive 620 records the additional recording medium ID on the medium 610. The counter value is recorded in a non-volatile memory such as a flash memory, and is turned on / off. Regardless, the counter value is held in the memory. When recording a new media ID, the latest counter value is read from the memory, and a counter value increment process is performed to set the latest counter value to (+1).

  A drive 620 shown in FIG. 10 stores and holds a drive public key certificate 423 in a memory. The drive public key certificate 423 stores a 48-bit drive ID as described above with reference to FIG. That is, identification information unique to the drive of 48-bit data.

The drive 620 determines the validity by verifying the signature of the drive public key certificate 423, and then obtains the stored 48-bit drive ID. In step S231, the drive 620 generates the drive ID of the 48-bit data and the counter 621. The 64-bit unique data is generated by concatenating the 16-bit data, and the generated 64-bit unique data is recorded on the medium 610 as the additional recording medium ID 611. That is,
[Additional media ID (64 bits)] = [Drive ID (48 bits)] ‖ [Counter value (16 bits)]
A 64-bit recordable media ID 611 is generated by the above formula and recorded on the media 610.

When recording and playback processing of content media in accordance with the AACS standard is performed, the 64-bit additional recording media ID 611 and the 64-bit recorded media ID 612 recorded from the beginning of the media 610 are concatenated to 128 bits. This 128-bit data is used as an AACS compatible media ID. That is,
AACS specified media ID (128 bits) = [appendable media ID (64 bits)] || [recorded media ID (64 bits)]
According to the above formula, two 64-bit IDs are concatenated to generate 128-bit data, which is used as a 128-bit AACS compatible media ID.

  That is, when recording or playing back content, the drive 620 generates 128-bit data by concatenating the 64-bit recordable media ID 611 and the 64-bit recorded media ID 612 in step S232 shown in FIG. . In step S52, the generated media ID is used as MAC value generation target data, and the generated MAC value and the 128-bit media ID generated by the concatenation process are output to the host 630. In step S62, the host 630 executes a MAC verification process based on the received 128-bit media ID and MAC value. The subsequent processing is the same as the processing described above with reference to FIG.

In the above processing example, all 16 bits, which are the difference between the 64-bit write-once media ID and the 48-bit drive ID, are set as the counter value, but other data may be combined. For example, 64 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the counter value generated by the counter 621 is (16−n) bits. That is,
[Additional Media ID (64 bits)] = [Drive ID (48 bits)] ‖ [Counter Value (16-nbit)] ‖ [Other ID (nbit)]
A 64-bit additional recording medium ID 611 may be generated by the above formula and recorded on the medium 610.

The recording timing and recording area of the media ID in the drive 620 are as follows.
(A) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(B) For DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

  A specific recording configuration of the additional recording medium ID 611 on the medium 610 will be described later. The other processing of the drive 620 and the processing of the host 630 are the same as the processing using the AACS compatible disk described above with reference to FIG. As described above, in this processing example, a 48-bit drive ID and a counter value or other IDs are added to generate 64-bit unique data, which is recorded on the medium as an additional recording medium ID, and complies with the AACS regulations. In the recording / reproducing process, a 64-bit recorded media ID recorded on the media and a 64-bit additional recording media ID are connected to generate and use a 128-bit media ID corresponding to the AACS standard. Therefore, it is possible to perform content recording and reproduction processing in accordance with the sequence defined by AACS similar to the AACS compatible disc using DVD-R, DVD-RW, or DVD-RAM media.

(B) Processing example of generating, recording, and using a media ID using a random number Next, in a configuration for using DVD-R, DVD-RW, or DVD-RAM media, a write-once media ID is generated using a random number. An example of processing recorded on a medium and used will be described with reference to FIG.

  In FIG. 11, the leftmost medium (information recording medium) 650 is a DVD-R, DVD-RW, or DVD-RAM medium, and a 64-bit recorded medium ID 652 is recorded in the BCA, which corresponds to the AACS standard. This is a medium in which a 128-bit media ID is not recorded. A drive 660 as an access device for the medium 610 is shown at the center, and a host 670 that executes content recording / playback processing via the drive 660 at the right end. Both the drive 660 and the host 670 are AACS compatible devices.

  11, the same reference numerals as those in FIG. 6 are set for the same data and processing steps as those in FIG. 6, and the data and the processing steps to which these same reference numerals are assigned are the same as those in FIG. 6. Description is omitted. In the present embodiment, the drive 660 generates 64-bit unique data and records it as a write-once medium ID 651 on the medium 650, and together with the 64-bit recorded medium ID 652 recorded on the medium 650, the AACS standard 128 This configuration is used as a bit media ID.

  In the present embodiment, the drive 660 includes a random number generation unit (RNG) 661. The random number generation unit 661 is a random number generation unit that generates a new random number every time the drive 660 records a write-once medium ID on the medium 650, and is a random number generation unit that executes a pseudo random number generation process or a true random number generation process. .

  The drive 660 shown in FIG. 11 stores and holds the drive public key certificate 423 in the memory. The drive public key certificate 423 stores a 48-bit drive ID as described above with reference to FIG. That is, identification information unique to the drive of 48-bit data.

The drive 660 obtains the stored 48-bit drive ID after determining the validity by verifying the signature of the drive public key certificate 423, and in step S241, the drive ID of the 48-bit data and the random number generation unit 661. The 64-bit unique data is generated by concatenating the 16-bit data generated in the above, and the generated 64-bit unique data is recorded on the medium 650 as the additional recording medium ID 651. That is,
[Additional media ID (64 bits)] = [Drive ID (48 bits)] ‖ [Random number (16 bits)]
A 64-bit additional recording medium ID 651 is generated by the above formula and recorded on the medium 650.

When recording and playback processing of content media according to the AACS standard is performed, the 64-bit additional recording media ID 651 and the 64-bit recorded media ID 652 recorded from the beginning of the media 650 are concatenated to 128 bits. This 128-bit data is used as an AACS compatible media ID. That is,
AACS specified media ID (128 bits) = [appendable media ID (64 bits)] || [recorded media ID (64 bits)]
According to the above formula, two 64-bit IDs are concatenated to generate 128-bit data, which is used as a 128-bit AACS compatible media ID.

  That is, when recording or playing back content, the drive 660 generates 128-bit data by concatenating the 64-bit recordable media ID 651 and the 64-bit recorded media ID 652 in step S242 shown in FIG. . In step S52, the generated media ID is used as the MAC value generation target data, and the generated MAC value and the 128-bit media ID generated by the concatenation process are output to the host 670. In step S62, the host 670 executes a MAC verification process based on the received 128-bit media ID and MAC value. The subsequent processing is the same as the processing described above with reference to FIG.

In the above processing example, all 16 bits, which are the differences between the 64-bit write-once media ID and the 48-bit drive ID, are set as random numbers, but other data may be combined. For example, 64 bits by combining [other ID] information such as a contractor ID (AACS contractor ID) provided from the AACS management center to the content user and other device IDs set in the recording device. The unique data may be generated. If the number of bits of [other ID] is n bits, the random number generated by the random number generation unit 661 is (16-n) bits. That is,
[Additional Media ID (64 bits)] = [Drive ID (48 bits)] ‖ [Random Number (16-nbit)] ‖ [Other ID (nbit)]
A 64-bit additional recording medium ID 651 may be generated by the above formula and recorded on the medium 650.

The recording timing and recording area of the media ID in the drive 660 are as follows.
(A) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(B) For DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

  A specific recording configuration for the medium 650 having the additional recording medium ID 651 will be described later. The other processes of the drive 660 and the process of the host 670 are the same as the processes using the AACS compatible disk described above with reference to FIG. As described above, in this processing example, a 64-bit unique data is generated by adding a 48-bit drive ID and a random number or other IDs, and this is recorded on the medium as a write-once medium ID, in accordance with the AACS regulations. In the recording / playback processing, a configuration is used in which a 64-bit recorded media ID recorded on a medium and a 64-bit additional recording media ID are linked to generate and use a 128-bit media ID corresponding to the AACS standard. Therefore, it becomes possible to perform content recording and reproduction processing in accordance with the sequence defined by AACS similar to the AACS compatible disc, using DVD-R, DVD-RW, or DVD-RAM media.

[3. Recording Configuration of Media ID on Information Recording Medium (Media)]
As explained in the embodiments of the present invention described above,
* For each media of DVD + RW and DVD + R, a 128-bit unique data is generated and recorded on the media, and used as an AACS compatible media ID.
* For each DVD-RW, DVD-R, and DVD-RAM media, 64-bit unique data is generated and recorded on the media as a recordable media ID, and the recordable media ID and recorded media ID are linked. It is configured to be used as an AACS compatible media ID.

  In the original AACS compatible media, a 128-bit media ID is recorded in, for example, a burst cutting area (BCA) at a disc manufacturing factory. However, as described above, in the configuration of the present invention, a general user device executes a process of recording a 128-bit or 64-bit ID, and cannot be recorded in a burst cutting area (BCA).

That is, it is necessary to set the recording area of these IDs in a recordable area by a general recording apparatus as a user device or a combination configuration of a PC and a drive as a host. In the embodiment of the present invention, as described above,
(A) For DVD + RW media,
At the time of formatting, the data is recorded in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(B) For DVD + R media,
At the time of the first recording on the blank disc, recording is performed in the sector header (RSV) of the data recording area of the medium (for example, the second buffer zone of the lead-in area: Lead-in Zone / Buffer Zone 2).
(C) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(D) In the case of DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

The recording area is set to perform ID recording. Hereinafter, a specific recording configuration of the media ID will be described. The following items will be described sequentially.
(3.1. Media ID recording structure in DVD + R or DVD + RW)
(3.2. Recording Configuration of Media ID in DVD-R, DVD-RW, DVD-RAM)

(3.1. Media ID recording structure in DVD + R or DVD + RW)
First, an example of a media ID recording area in DVD + RW and DVD + R will be described with reference to FIG. In DVD + RW and DVD + R, a 128-bit media ID is recorded in the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the media.

  FIG. 12 is a diagram showing the configuration of the lead-in area in DVD + RW and DVD + R. The lead-in area is provided in the inner periphery of the medium (disc) 700, and a data zone as a general content recording area is formed in the outer periphery of the lead-in area.

  In the embodiment of the present invention, in the case of DVD + RW and DVD + R media, a 128-bit media ID is recorded in the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the media. This is the media ID recording area 701 shown in FIG.

512 sectors can be recorded in the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area, which is the media ID recording area 701 shown in FIG. The data structure of the sector is shown in FIG. As shown in FIG. 13, one sector consists of 172 bytes × 12 = 2064 bytes. In one sector, data areas [ID], “IED”, [RSV or CPR MAI], “Main Data area”, and [EDC] are set.
In ID (Identified Data), sector information and a physical sector number are recorded.
In IED (ID Error Detection Code), an error detection code of ID 4 bytes is recorded.
RSV or CPR_MAI (Copyright Management Information) is a sector header.
In EDC (Error Detection Code), an error detection code of data (2060 bytes) other than the EDC portion is recorded.

  Sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the media at the time of formatting in the case of DVD + RW media and at the time of the first recording on a blank disc in the case of DVD + R media The media ID is recorded on the. The media ID to be recorded is 128 bits, but as shown in FIG. 13, the RSV area of one sector is 6 bytes (= 48 bits). Therefore, a 128-bit media ID is divided and recorded using a plurality of 512 sectors included in the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area.

  An example of divided recording of media IDs will be described with reference to FIG. The example shown in FIG. 14 is an example in which a 128-bit media ID is recorded in 16 sectors divided into 8 bits.

  The sector header (RSV) 6 of one sector included in the medium ID recording area 701 of the medium (disc) 700 shown in FIG. 14, that is, the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area of the medium. FIG. 14A shows the byte configuration. As shown in FIG. 14A, 1 byte (= 8 bits) in 6 bytes of the sector header (RSV) is used as a recording area for 8-bit data obtained by dividing a 128-bit media ID. The other 5 bytes are reserved.

  14 using the sector header (RSV) of 16 consecutive sectors included in the media ID recording area 701 of the medium 700, that is, the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. An 8-bit divided media ID is recorded in the format shown in (a), and a 128-bit media ID is recorded using a sector header (RSV) of 16 sectors as shown in FIG. 14 (b).

  In this way, data obtained by dividing the 128-bit media ID into 16 sectors (1 byte) in the sector header (RSV) of consecutive sectors included in the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. (8 bits)), and one 128-bit media ID is recorded using 16 consecutive sector headers (1 ECC block). Note that the media ID is preferably recorded repeatedly in units of 1 ECC block (16 sectors) in order to avoid reading errors and the like.

  Note that there is VCPS (Video Content Protection System) as a standard of copyright protection technology corresponding to DVD + R and DVD + RW. In this VCPS, a unique ID (Unique ID) generated by generating a random number is generated and recorded. For VCPS, [VCPS specifications version 1.34, April 2006 http://www.licensing.philips.com /vcps/documents1024.html].

  In the VCPS standard, the unique ID (Unique ID) is set to be recorded in the sector header (RSV) of the sector included in the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. A corresponding unique ID and a 128-bit media ID corresponding to AACS according to an embodiment of the present invention may be set to be written together in the sector header (RSV). FIG. 15 shows a configuration example of the media ID recording set as this setting.

  FIG. 15 shows a 6-byte sector header (RSV) structure of one sector included in the media ID recording area 701 of the medium 700, that is, the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. (A). As shown in FIG. 15A, 1 byte (= 8 bits) in 6 bytes of the sector header (RSV) is used as a recording area for 8-bit data obtained by dividing a 128-bit media ID. The other 5 bytes are used as a recording area for a unique ID (Unique ID) corresponding to VCPS. As shown in FIG. 15B, a 128-bit media ID is recorded using a sector header (RSV) of 16 sectors.

  In this way, data obtained by dividing the 128-bit media ID into 16 sectors (1 byte) in the sector header (RSV) of consecutive sectors included in the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. (8 bits)), a single 128-bit media ID is recorded using 16 consecutive sector headers (one ECC block), and a VCPS-compatible unique ID is also written. The media can be media compatible with both AACS and VCPS standards.

First, as described in the embodiment of the present invention with reference to FIG. 2, FIG. 3, and FIG. 7 to FIG. 9, in the case of DVD + RW and DVD + R media, a 128-bit media ID is generated and recorded on the media.
In a drive-integrated recording apparatus, a counter value or a random number value is added to a device identifier (Device Number) of the recording apparatus to generate 128-bit data, or other data is further added to generate 128-bit data. It was set as the structure which produces | generates.
In a system to which a drive and a host are applied, 128-bit data is generated by adding a counter value or a random number value to a drive ID acquired from a drive public key certificate (Drive Certificate) of the drive, or other This is added to generate 128-bit data.

  A specific data configuration example of a 128-bit media ID will be described with reference to FIGS. FIG. 16 is a data configuration example of a 128-bit media ID generated and recorded on a medium in a drive-integrated recording apparatus, and FIG. 17 is a 128-bit media ID data generated by the drive and recorded on the medium in a drive host configuration. It is a structural example.

  A 128-bit media ID generated in a drive-integrated recording apparatus and recorded on a medium has, for example, the configuration shown in FIG. FIG. 16A1 shows a media ID generated by the recording apparatus described with reference to FIG. 2, that is, a media ID using a serial number as a counter value to which a counter is applied. (A2) is a media ID generated by the recording apparatus described with reference to FIG. 3, that is, a media ID using a random number (Random Number) to which a random number generation unit is applied.

  As shown in FIG. 16, the media ID is obtained from a licensee ID (Licensee ID), a version (Version), a disk type (Disk Type), a device identifier (Device Number), and a serial number (Serial Number) or a random number (Random Number). Composed.

In the data configuration shown in FIG. 16, the vertical direction is the number of bytes (0 to 15), the horizontal direction is the number of bits (0 to 7), and is 16 bytes, that is, 128-bit data. The contents of each data are as follows.
0th to 1st bytes = Licensee ID (Licensee ID): A unique ID assigned to a license contractor from AACS (recorded in a program or memory executed by a recording device which is an AACS compatible device)
Second byte = Version: Version of the data format of the media ID (a version set in advance corresponding to the media ID recorded according to the present embodiment and recorded in a program or memory executed by the recording device Yes)
3rd byte = Disk type: information indicating whether the medium (disc) is rewritable and writable only once, or indicates the media type of 1 layer / 2 layers (recording device) Will determine the media type and acquire the media type)
4th to 7th bytes = Device identifier: Device identifier 122 of the recording apparatus 220 shown in FIG.

Further, the media ID shown in FIG. 16A1 includes the following data.
8th to 15th bytes = Serial Number: Counter value generated by the counter 221 of the recording apparatus 220 shown in FIG. 2 The media ID shown in FIG. 16 (a2) includes the following data.
8th to 15th bytes = Random Number: A random value generated by the random number generation unit 261 of the recording device 260 shown in FIG.

The recording devices 220 and 260 of the embodiment shown in FIG. 2 or 3 acquire the fourth to seventh byte data shown in FIGS. 16A1 and 16A2 from the device identifier 122, and the eighth to eighth data. Data for the number of bits corresponding to 15 bytes is generated by the counter 221 (FIG. 2) or the random number generator 261 (FIG. 3). The 128-bit unique data generated in this way is recorded on the medium as a media ID. That is, assuming that the information of the 0th to 3rd bytes shown in FIGS. 16A1 and 16A2 is acquired in advance [acquired information],
[Media ID (128 bits)] = [Acquired information] ‖ [Device identifier] ‖ ([Counter value] or [Random number])
A 128-bit media ID is generated by the above formula and recorded on the media. As a result, the media IDs shown in FIGS. 16A1 and 16A2 are recorded. Note that the media ID is divided and recorded in the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area of the media as described above.

  Next, the data configuration of the 128-bit media ID generated by the drive and recorded on the media in the drive host configuration will be described with reference to FIG. In the drive host configuration, the 128-bit media ID generated by the drive and recorded on the media has, for example, the configuration shown in FIG. FIG. 17B1 shows a media ID generated by the drive described with reference to FIG. 7, that is, a media ID using a serial number as a counter value to which a counter is applied. b2) is a media ID generated by the drive described with reference to FIG. 9, that is, a media ID using a random number (Random Number) to which a random number generator is applied.

  As shown in FIG. 17, the media ID is obtained from a licensee ID (Licensee ID), a version (Version), a disk type (Disk Type), a drive ID (Drive ID), and a serial number (Serial Number) or a random number (Random Number). Composed.

  The difference from the media ID shown in FIG. 16 is that the fourth to seventh byte data is changed from a device identifier (Device Number) to a drive ID (Drive ID). The drive ID (Drive ID) is data acquired by the drive from the drive public key certificate <Drive Certificate> (see FIG. 8) held by the drive as described above with reference to FIGS. .

The drives 520 and 560 of the embodiment shown in FIG. 7 or FIG. 9 have the drive public key certificate that holds the drive ID (Drive ID) corresponding to the 4th to 7th byte data shown in FIGS. The data for the number of bits corresponding to the eighth to fifteenth bytes is generated by the counter 521 (FIG. 7) or the random number generator 561 (FIG. 9). The 128-bit unique data generated in this way is recorded on the medium as a media ID. That is, assuming that the information of the 0th to 3rd bytes shown in FIGS. 17B1 and 17B2 is acquired in advance [acquired information],
[Media ID (128 bits)] = [Acquired information] ‖ [Device identifier] ‖ ([Counter value] or [Random number])
A 128-bit media ID is generated by the above formula and recorded on the media. As a result, the media ID shown in FIGS. 17B1 and 17B2 is recorded. Note that the media ID is divided and recorded in the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area of the media as described above.

  A processing sequence for generating a 128-bit media ID for DVD + RW and DVD + R media and recording the media ID on the media will be described with reference to flowcharts shown in FIGS. The flowcharts shown in FIGS. 18 and 19 are executed under the control of the recording apparatus described with reference to FIG. 2 or 3 or the control unit of the drive described with reference to FIG. 7 or FIG.

  First, in step S301, the type of media (disk) loaded in the recording device or drive is determined. That is, it is a determination process of whether the disc type is DVD + R or DVD + RW. If it is DVD + RW, the process proceeds from step S302 to step S303, where it is determined whether or not there is a format request. If there is no format request, the process ends without recording the media ID.

  If a format request is detected, the process proceeds to step S304, and a device identifier or drive ID is acquired. That is, in the case of a drive-integrated recording apparatus (recording apparatus shown in FIGS. 2 and 3), a device identifier (Device Number) held in the memory of the recording apparatus is acquired, and the drive (see FIG. 7 and the drive shown in FIG. 9, the drive public key certificate is verified, and the drive ID stored in the drive public key certificate is acquired on the condition that the validity is confirmed.

  In step S305, a value to be applied as media ID configuration data is generated by a counter or a random number. In step S306, the device identifier or drive ID acquired in step S304 and the counter value or random number acquired in step S305 are combined to generate a 128-bit media ID. At this time, as described with reference to FIGS. 16 and 17, for example, a media ID of 128-bit data may be generated by combining data such as a license ID, version, and disk type.

  In step S307, the generated 128-bit media ID is recorded in the lead-in area of the media. As described with reference to FIGS. 12 to 17, the data is divided and recorded in the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the medium. After the recording of the media ID is completed, the formatting process is executed in step S308 and the process is terminated.

  On the other hand, if it is determined in the disc type determination that the disc type is DVD + R, the process proceeds from step S302 to step S311. In step S311, it is determined whether the set medium is a blank medium in which data is not recorded. If the set medium is not a blank medium in which no data is recorded, the process ends without executing the recording of the medium ID. If the set medium is a blank medium in which no data is recorded, the process proceeds to step S312, where it is determined whether or not there is a data recording request, and if there is no data recording request, the process waits. The process proceeds to S313.

  The processing of steps S313 to S316 is the same media ID generation and recording processing as the processing of steps S304 to S307, and a description thereof will be omitted. After the recording of the media ID is completed in step S316, data recording is executed in step S317, and the process ends.

  As described above with reference to FIG. 15, there is VCPS (Video Content Protection System) as a standard of copyright protection technology corresponding to DVD + R and DVD + RW. In the VCPS standard, a unique ID (Unique ID) is used. It is set to record in the sector header (RSV) of the sector included in the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area. When the medium is a VCPS compatible disc, a VCPS compatible unique ID is recorded together with the recording of the AACS compatible media ID according to the flow of FIG.

  The determination as to whether or not to record the unique ID corresponding to the VCPS and the recording process are executed in steps S307 and S316 in the flow shown in FIG. 18, for example. The processing sequence in this case will be described with reference to the flowchart shown in FIG.

  The flow shown in FIG. 19 is executed in steps S307 and S316 in the flow of FIG. First, in step S351, it is determined whether or not the disk is a VCPS compatible disk. If the disc is not a VCPS disc, the process advances to step S361 to record only the AACS-compatible 128-bit media ID in the lead-in area.

  On the other hand, if it is determined in step S351 that the disk is a VCPS compatible disk, the process proceeds to step S352, a unique ID (Unique ID) corresponding to VCPS is generated (random number generation), and in step S353, the AACS compatible disk is generated. A 128-bit media ID and a VCPS-compatible unique ID (Unique ID) are recorded. This recording mode is, for example, the mode described with reference to FIG.

(3.2. Recording Configuration of Media ID in DVD-R, DVD-RW, DVD-RAM)
Next, the recording configuration of the media ID in DVD-R, DVD-RW, and DVD-RAM will be described. In the DVD-R, DVD-RW, and DVD-RAM, as described in the previous embodiment, the media ID recording timing and recording area are as follows.
(A) In the case of DVD-RW / -RAM media,
At the time of formatting, it is recorded in the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.
(B) For DVD-R media,
At the time of the first recording on the blank disc, recording is performed on the sector header (CPR-MAI) of the data recording area (for example, lead-in area) of the medium.

  In DVD-RW, DVD-R, and DVD-RAM, a 64-bit additional recording medium ID is recorded in an empty area of the lead-in area of the medium. Note that a 64-bit recorded media ID has already been recorded in the burst cutting area on DVD-RW, DVD-R, and DVD-RAM, and a 64-bit additional record is made to construct an AACS-compatible 128-bit media ID. The media ID is recorded in an empty area of the media lead-in area.

  FIG. 20 is a diagram showing the configuration of the lead-in area in DVD-RW and DVD-R. A DVD-RAM lead-in area (not shown) is also composed of a control data zone (Control Data Zone) of a recorded area and other recordable areas, like DVD-RW and DVD-R. The lead-in area is provided on the inner periphery of the disc 800, and a data zone as a general content recording area is formed on the outer periphery of the lead-in area.

  In the embodiment of the present invention, in the case of DVD-RW, DVD-R, and DVD-RAM media, a 64-bit write-once media ID is recorded in the sector header (CPR-MAI) of the empty area in the lead-in area of the media. In the configuration of the lead-in area shown in FIG. 20, existing data is recorded in the control data zone (Control Data Zone), and a free area in the other areas is set as a media ID recording area 801.

  The media ID recording area 801 is composed of a number of sectors. The sector data has the configuration described above with reference to FIG. That is, one sector consists of 172 bytes × 12 = 2064 bytes as shown in FIG. In one sector, [ID], “IED”, [RSV or CPR MAI], “Main Data area”, and [EDC] data areas are set.

  In the case of formatting in the case of DVD-RW / -RAM media, in the case of DVD-R media, in the case of the first recording on a blank disc, the additional recording media ID is added to the sector header (CPR-MAI) of the sector in the lead-in area Record. Note that the additional recording medium ID is 64 bits as described above. The sector header (CPR-MAI) of one sector is 6 bytes (= 48 bits) as shown in FIG. Therefore, the 64-bit write-once media ID is divided and recorded using a plurality of sectors included in the lead-in area.

  An example of media ID division recording will be described with reference to FIG. The example shown in FIG. 21 is an example in which a 64-bit write-once media ID is divided and recorded in two sectors by 4 bytes (32 bits).

  FIG. 21A shows a 6-byte sector header (CPR_MAI) configuration of one sector included in the media ID recording area 801 of the medium (disk) 800 shown in FIG. 21, that is, the lead-in area of the medium. is there. As shown in FIG. 21A, 4 bytes (= 32 bits) of the 2nd to 5th bytes in 6 bytes of the sector header (CPR_MAI) are used as a recording area for 32-bit data obtained by dividing a 64-bit media ID. .

  Using the media ID recording area 801 of the medium 800, that is, the sector header (CPR_MAI) of two consecutive sectors included in the lead-in area, a 32-bit divided media ID in the format shown in FIG. As shown in FIG. 21B, a 64-bit additional recording media ID is recorded using the sector header (CPR_MAI) of two sectors.

  As described above, data obtained by dividing the 64-bit additional recording medium ID is recorded in the sector header (CPR_MAI) of the consecutive sectors included in the lead-in area, and one 64 by using two consecutive sector headers. A bit additional recording media ID is recorded. Note that it is preferable that the additional recording medium ID is repeatedly recorded in order to avoid reading errors and the like.

As described above with reference to FIGS. 4, 5, 10, and 11, in the case of DVD-RW, DVD-R, DVD = RAM media, 64-bit additional recording media An ID is generated and recorded on the medium.
In a drive-integrated recording apparatus, 64-bit data is generated by adding a counter value or a random number value to a device identifier (Device Number) of the recording apparatus, or by adding other data to 64-bit data. It was set as the structure which produces | generates.
In a system to which a drive and a host are applied, 64-bit data is generated by adding a counter value or a random value to a drive ID acquired from a drive public key certificate (Drive Certificate) of the drive, or other This data is added to generate 64-bit data.

  In the content recording / playback sequence, it is necessary to use a 128-bit media ID corresponding to AACS. In this case, as described in the previous embodiment, the 64-bit additional recording media ID and the medium are recorded on the media. The 64-bit recorded media ID (CPRM media ID) is concatenated and used as a 128-bit media ID corresponding to AACS.

  A specific data configuration example of a 128-bit media ID will be described with reference to FIGS. FIG. 22 is a data configuration example of an AACS compatible 128-bit media ID composed of a 64-bit additional recording media ID generated and recorded on a medium in a drive-integrated recording apparatus, and a recorded media ID (CPRM media ID). 23 is a data configuration example of an AACS compatible 128-bit media ID including a 64-bit additional recording media ID generated by the drive and recorded on the media in the drive host configuration, and a recorded media ID (CPRM media ID).

  A 128-bit AACS compatible media ID generated by using a 64-bit write-once media ID that is generated in a drive-integrated recording apparatus and recorded on a medium has, for example, the configuration shown in FIG. FIG. 22A1 shows the additional recording medium ID generated by the recording apparatus described with reference to FIG. 4, that is, the additional recording medium ID using a serial number as a counter value to which the counter is applied. FIG. 22 (a2) uses a write-once media ID generated by the recording apparatus described with reference to FIG. 5, that is, a random number (Random Number) to which a random number generator is applied. This is a 128-bit media ID having the additional recording media ID as a constituent element.

The media ID is as shown in FIG.
0th to 7th bytes (64 bits): Recorded media ID (CPRM media ID)
8th to 11th bytes (32 bits) = Device identifier (Device Number): Device identifier (Device Number) 122 of the recording apparatus 320 shown in FIG.
In addition to these data, the media ID shown in FIG. 22A1 includes the following data.
12th to 15th bytes = Serial Number: Counter value generated by the counter 321 of the recording device 320 shown in FIG. 4 The media ID shown in FIG. 22 (a2) includes the following data.
12th to 15th bytes = Random Number: A random value generated by the random number generation unit 361 of the recording apparatus 360 shown in FIG.

The additional recording media ID generated by the recording devices 320 and 360 of the embodiment shown in FIG. 4 or 5 is 8 bytes (64 bits) data corresponding to the 8th to 15th bytes of the media ID shown in FIG. . These data are generated by a device identifier and a counter value or a random number. That is, the eighth to fifteenth byte information shown in FIGS. 22 (a1) and 22 (a2) is generated by the following formula using the write-once media ID.
[Additional media ID (64 bits)] = [Device identifier] ‖ ([Counter value] or [Random number])
A 64-bit write-once media ID is generated by the above formula and recorded on the media. Note that the additional recording medium ID is divided and recorded in the sector header (CPR_MAI) of the lead-in area of the medium as described above.

  Next, with reference to FIG. 23, the data structure of a 64-bit additional recording medium ID generated by the drive and recorded on the medium in the drive host configuration and an AACS-compatible 128-bit media ID composed of the recorded media ID (CPRM media ID) will be described. I will explain. FIG. 23 (b1) shows a write-once media ID generated by the drive described with reference to FIG. 10, that is, a write-once media ID using a serial number (Serial Number) as a counter value to which a counter is applied. FIG. 23 (b2) is an additional recording medium ID generated by the drive described with reference to FIG. 11, that is, an additional recording using a random number (Random Number) to which a random number generator is applied. It is a 128-bit media ID having a media ID as a component.

As shown in FIG.
0th to 7th bytes (64 bits): Recorded media ID (CPRM media ID)
8th to 11th bytes (32 bits) = Drive ID: Drive ID obtained from the drive public key certificate of the drive 620 shown in FIG.
In addition to these data, the media ID shown in FIG. 23 (b1) includes the following data.
12th to 15th bytes = Serial Number: Counter value generated by the counter 621 of the drive 620 shown in FIG. 10 The media ID shown in FIG. 23 (b2) includes the following data.
12th to 15th bytes = Random Number: A random value generated by the random number generation unit 661 of the drive 660 shown in FIG.

The write-once media ID generated by the drives 620 and 660 of the embodiment shown in FIG. 10 or FIG. 11 is 8 bytes (64 bits) of data corresponding to the 8th to 15th bytes of the media ID shown in FIG. These data are generated by a drive ID and a counter value or a random number. That is, the eighth to fifteenth byte information shown in FIGS. 23 (b1) and 23 (b2) is generated by the following formula using the additional recording media ID.
[Additional media ID (64 bits)] = [Drive ID] ‖ ([Counter value] or [Random number])
A 64-bit write-once media ID is generated by the above formula and recorded on the media. Note that the additional recording medium ID is divided and recorded in the sector header (CPR_MAI) of the lead-in area of the medium as described above.

  A processing sequence for generating a 64-bit write-once medium ID for a DVD-RW, DVD-R, or DVD-RAM medium and recording it on the medium will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 24 is executed under the control of the recording apparatus described with reference to FIG. 4 or 5 or the control unit of the drive described with reference to FIG. 10 or FIG.

  First, in step S501, the type of media (disk) loaded in the recording apparatus or drive is determined. That is, it is a determination process of whether the disc type is DVD-R, DVD-RW, or DVD-RAM. If it is a DVD-RW or DVD-RAM, the process proceeds from step S502 to step S503, where it is determined whether or not there is a format request. If there is no format request, the process ends without recording the media ID.

  If a format request is detected, the process proceeds to step S504, and a device identifier or drive ID is acquired. That is, in the case of a drive-integrated recording device (the recording device shown in FIGS. 4 and 5), a device identifier (Device Number) held in the memory of the recording device is acquired, and the drive (see FIG. 10 and the drive shown in FIG. 11, the drive public key certificate is verified, and the drive ID stored in the drive public key certificate is acquired on the condition that the validity is confirmed.

  In step S505, a value to be applied as media ID configuration data is generated by a counter or a random number. In step S506, a 64-bit write-once media ID is generated by combining the device identifier or drive ID acquired in step S504 with the counter value or random number acquired in step S505. At this time, additional data ID of 64-bit data may be generated by combining other data.

  In step S507, the generated 64-bit additional recording medium ID is recorded in the lead-in area of the medium. As described with reference to FIG. 20 to FIG. 21, the data is divided and recorded in the sector header (CPR_MAI) of the lead-in area of the medium. After the recording of the additional recording medium ID is completed, the formatting process is executed in step S508 and the process is terminated.

  On the other hand, in the disc type determination, if it is determined that the disc type is DVD-R, the process proceeds from step S502 to step S511. In step S511, it is determined whether or not the set medium is a blank medium in which no data is recorded. If the set medium is not a blank medium in which no data is recorded, the process ends without recording the additional recording medium ID. When the set medium is a blank medium in which no data is recorded, the process proceeds to step S512, where it is determined whether or not there is a data recording request, and when there is no data recording request, the process waits, and when a data recording request is detected, step The process proceeds to S513.

  The processes in steps S513 to S516 are generation and recording processes for a write-once medium ID similar to the processes in steps S504 to S507, and a description thereof will be omitted. After the recording of the additional recording medium ID is completed in step S516, data recording is executed in step S517, and the process is terminated.

[4. Function and configuration of information processing device]
Next, the function and configuration of the information processing apparatus that executes processing corresponding to the above-described embodiment will be described together with reference to FIG.

  FIG. 25 is a block diagram illustrating a functional configuration of an information processing apparatus that performs media ID recording processing. The storage unit 911 stores a program for executing a series of processes related to the recording process of the media ID, and is executed under the control of the CPU of the information processing apparatus. FIG. 25 is a functional block diagram showing the processing functions as individual blocks in order to explain the processing executed in the program.

  The storage unit 911 includes a storage unit 911 that stores a device identifier, which is a unique identifier set corresponding to the information processing apparatus, or a drive public key certificate having a drive ID as recording information, and an information recording medium (media) A media ID configuration information generation unit 912 that generates bit information constituting a media ID as a unique identifier corresponding to 920, a media ID configuration bit generated by the media ID configuration information generation unit 912, and a device acquired from the storage unit 911 A media ID generation unit 913 that generates data including an identifier as a media ID to be recorded on the information recording medium 920, and an information recording unit 914 that records the media ID generated by the media ID generation unit 913 on the information recording medium 920.

The media ID configuration information generation unit 912 includes a counter that generates a different counter value for each media ID generation process, or a random number generation unit. The media ID generation unit 913 includes:
Combination of counter value or random number and device identifier, or
Combination of counter value or random number and drive ID,
A media ID is generated by any of the above.

  When the information recording medium 920 is a DVD + R or DVD + RW medium, the media ID generation unit 913 includes 128-bit data including a media ID configuration bit generated by the media ID configuration information generation unit 912 and a device identifier. A media ID corresponding to AACS (Advanced Access Content System) is generated, and the information recording unit 914 uses the sector ID of the second buffer zone [Lead-in Zone / Buffer Zone 2] of the lead-in area of the information recording medium 920 as the media ID. A process of dividing and recording (RSV) is executed.

  When the information recording medium 920 is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System), the information recording unit 914 is an AACS (Advanced Access Content System) compatible medium generated by the media ID generation unit 913. A process of recording the ID and the unique ID corresponding to the VCPS generated by the random number in the lead-in area of the information recording medium 920 is executed.

  Further, when the information recording medium 920 is a DVD-R, DVD-RW, or DVD-RAM medium having a recorded media ID as recording data, the media ID generation unit 913 generates the media ID configuration information generation unit 912. Information recording unit 914 includes a media ID component bit and a device identifier or drive ID, and generates a write-once media ID consisting of 64-bit data. An information recording unit 914 generates an additional recording media ID generated by the media ID generation unit 913 as an information recording medium. A process of dividing and recording into a sector header (CPR_MAI) of an empty area of the lead-in area of 920 is executed.

  FIG. 26 shows an information processing apparatus that generates an AACS-compatible 128-bit media ID from a recorded media ID and a write-once media ID during content recording or playback processing on an information recording medium 950 consisting of either DVD + R or DVD + RW. It is a block diagram which shows a function structure. The storage unit 973 stores a program for executing a series of processes related to the media ID generation process, and is executed under the control of the CPU of the information processing apparatus. FIG. 26 is a functional block diagram showing the processing functions as individual blocks in order to explain the processing executed in the program.

  The information recording medium 950 is a DVD + R or DVD + RW medium having a recorded media ID as recording data. The media ID generation unit 972 generates a recorded media ID corresponding to CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium 950 via the recording medium IF 971 and an additional recording medium ID added to the information recording medium. Based on this, a 128-bit AACS (Advanced Access Content System) compatible media ID is generated. Specifically, the media ID generation unit 972 has a 64-bit CPRM-compatible media ID recorded in the burst cutting area (BCA) of the information recording medium 950 and 64 recorded in the lead-in area of the information recording medium 950. A process of generating a 128-bit AACS compatible media ID based on the bit additional recording media ID is executed.

  Further, when the information processing apparatus is an apparatus that records and reproduces content, the information processing apparatus includes a data processing unit 974 that performs content recording on the information recording medium or content reproduction processing from the information recording medium. Applies a 128-bit media ID generated by the media ID generation unit 972 and executes a content recording or playback sequence defined by AACS.

  Further, when the information processing apparatus is a drive apparatus that executes access to the information recording medium 950 and performs data input / output with the host, the content recording or reproduction specified by AACS via the data input / output unit 975 is performed. A process of outputting the 128-bit media ID generated by the media ID generation unit 972 to the host executing the sequence is executed.

  The present invention has been described in detail above with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the gist of the present invention. In other words, the present invention has been disclosed in the form of exemplification, and should not be interpreted in a limited manner. In order to determine the gist of the present invention, the claims should be taken into consideration.

  The series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing processing by software, the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run.

  For example, the program can be recorded in advance on a hard disk or ROM (Read Only Memory) as a recording medium. Alternatively, the program is temporarily or permanently stored on a removable recording medium such as a flexible disk, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disk, a DVD (Digital Versatile Disc), a magnetic disk, or a semiconductor memory. It can be stored (recorded). Such a removable recording medium can be provided as so-called package software.

  The program is installed on the computer from the removable recording medium as described above, or is wirelessly transferred from the download site to the computer, or is wired to the computer via a network such as a LAN (Local Area Network) or the Internet. The computer can receive the program transferred in this manner and install it on a recording medium such as a built-in hard disk.

  Note that the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary. Further, in this specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.

  As described above, according to the configuration of the embodiment of the present invention, for example, a device corresponding to a recording apparatus for an information recording medium (media) in which a 128-bit media ID defined by AACS is not recorded. Apply either the identifier (Device Number) or the drive ID in the drive public key certificate (Drive Certificate) corresponding to the drive, and generate 128-bit unique data by combining the counter value or random number. For example, the information is recorded in the lead-in area of the information recording medium. With this configuration, it is possible to record and use a 128-bit media ID even on media that does not have a 128-bit media ID defined by AACS, such as DVD + R / + RE / -R / -RW / -RAM media. It becomes possible to execute the content reproduction or recording sequence in accordance with the AACS standard.

It is a figure explaining the recording and reproduction | regeneration processing of the content according to AACS prescription | regulation in a drive integrated type apparatus. It is a figure explaining the example of a process which produces | generates 128-bit media ID using a counter, is recorded on a medium, and is utilized in the utilization structure of DVD + R or DVD + RW media. It is a figure explaining the example of a process which produces | generates 128-bit media ID using a random number, records on a medium, and uses it in the utilization structure of DVD + R or DVD + RW media. It is a figure explaining the example of a process which produces | generates write-once media ID using a counter, records on a medium, and uses it in the utilization structure of DVD-R, DVD-RW, or DVD-RAM media. It is a figure explaining the example of a process which produces | generates write-once media ID using a random number, records on a medium, and uses it in the utilization structure of DVD-R, DVD-RW, or DVD-RAM media. It is a figure explaining the recording and reproduction | regeneration processing of the content according to AACS prescription | regulation in the content recording / reproduction processing structure using recording / reproducing apparatuses, such as PC which connected the drive apparatus. It is a figure explaining the example of a process which produces | generates 128-bit media ID using a counter, is recorded on a medium, and is utilized in the utilization structure of DVD + R or DVD + RW media. It is a figure explaining the data structural example of a drive public key certificate. It is a figure explaining the example of a process which produces | generates 128-bit media ID using a random number, records on a medium, and uses it in the utilization structure of DVD + R or DVD + RW media. It is a figure explaining the example of a process which produces | generates 128-bit media ID using a counter, records on a medium, and uses it in the utilization structure of the medium of DVD-R, DVD-RW, and DVD-RAM. It is a figure explaining the example of a process which produces | generates write-once media ID using a random number, records on a medium, and uses it in the utilization structure of DVD-R, DVD-RW, or DVD-RAM media. It is a figure explaining the example of the media ID recording area in DVD + RW and DVD + R. It is a figure explaining the data structure of sector data. It is a figure explaining an example of the division | segmentation recording of media ID. It is a figure explaining the example of a setting which writes together unique ID corresponding to VCPS, and 128-bit media ID corresponding to AACS in a sector header (RSV). It is a figure explaining the data structural example of concrete 128-bit media ID. It is a figure explaining the data structural example of 128 bit media ID which a drive produces | generates and records on a medium in a drive host structure. It is a figure which shows the flowchart explaining the processing sequence which produces | generates 128-bit media ID with respect to DVD + RW and DVD + R media, and records on a medium. It is a figure which shows the determination of recording of the unique ID corresponding to VCPS, and a flowchart explaining a recording processing sequence. It is a figure which shows the structure of the lead-in area | region in DVD-RW and DVD-R. It is a figure explaining an example of the division | segmentation recording of media ID. It is a figure explaining the data structural example of concrete 128-bit media ID. It is a figure explaining the data structural example of concrete 128-bit media ID. It is a figure which shows the flowchart explaining the processing sequence which produces | generates 64-bit additional recording media ID with respect to DVD-RW, DVD-R, and DVD-RAM media, and records on media. It is a block diagram explaining the structure of the information processing apparatus which performs the process according to this invention. It is a block diagram explaining the structure of the information processing apparatus which performs the process according to this invention.

Explanation of symbols

110 Media (information recording medium)
111 MKB
112 Media ID
113 MAC verification value 114 Binding nonce 115 Unit key file 116 Usage control information 117 Encrypted content 120 Recording device 121 Device key 122 Device identifier 123 Title key 124 Usage control information 130 Playback device 131 Device key 132 Device identifier 133 Content 210 Media (information) recoding media)
211 Media ID
220 recording device 221 counter 230 playback device 250 medium (information recording medium)
251 Media ID
260 Recording Device 261 Random Number Generation Unit 270 Playback Device 310 Media (Information Recording Medium)
311 Additional media ID
312 Recorded media ID
320 Recording Device 321 Counter 330 Playback Device 350 Media (Information Recording Medium)
351 Media ID
352 Recorded media ID
360 Recording Device 361 Random Number Generation Unit 370 Playback Device 410 Media (Information Recording Medium)
411 MKB
412 Drive revocation list 413 Host revocation list 414 Media ID
415 Encrypted content 420 Drive 421 AACS management center public key 422 Drive private key 423 Drive public key certificate 430 Host 431 Device key 432 Device identifier 433 AACS management center public key 434 Host private key 435 Host public key certificate 437 Encryption processing unit 510 Media (information recording medium)
520 drive 521 counter 530 host 550 medium (information recording medium)
560 Drive 561 Random number generator 570 Host 610 Media (information recording medium)
611 Additional media ID
612 Recorded media ID
620 drive 621 counter 630 host 650 medium (information recording medium)
651 Additional media ID
652 Recorded media ID
660 drive 661 random number generator 670 host 700 medium (information recording medium)
701 Media ID recording area 800 Media (information recording medium)
801 Media ID recording area 911 Storage unit 912 Media ID configuration information generation unit 913 Media ID generation unit 914 Information storage unit 920 Media (information recording medium)
950 media (information recording media)
971 Recording medium I / F
972 Media ID generation unit 973 Storage unit 974 Data processing unit 975 Data input / output unit

Claims (65)

A storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus;
A media ID configuration information generation unit that generates bit information that configures a media ID as a unique identifier corresponding to an information recording medium (media);
A media ID generation unit that generates a media ID configuration bit generated by the media ID configuration information generation unit and data including the device identifier as a media ID to be recorded on the information recording medium;
An information recording unit for recording the media ID generated by the media ID generation unit on an information recording medium;
An information processing apparatus comprising: The media ID configuration information generation unit is configured by a counter that generates a different counter value for each generation process of the media ID,
The media ID generation unit
The information processing apparatus according to claim 1, wherein the information including the counter value generated by the counter and the data including the device identifier is generated as a media ID to be recorded on the information recording medium. The media ID configuration information generation unit is configured by a random number generation unit that generates a random number,
The media ID generation unit
The information processing apparatus according to claim 1, wherein the random number generated by the random number generation unit and data including the device identifier are generated as a media ID recorded on the information recording medium (media). . The information recording medium is DVD + R or DVD + RW media,
The media ID generation unit
The media ID configuration information generation unit generates a media ID corresponding to an AACS (Advanced Access Content System) including 128 bits of data including the media ID configuration bit and the device identifier. The information processing apparatus according to claim 1. The media ID generation unit
A media ID compatible bit generated by the media ID configuration information generating unit, the device identifier, and other data are added to generate an AACS compatible media ID consisting of 128 bits of data. The information processing apparatus according to claim 4. The information recording unit
The information processing apparatus according to claim 4, wherein the information processing apparatus is configured to execute a process of recording a media ID generated by the media ID generation unit in a lead-in area of an information recording medium. The information recording unit
Processing for dividing and recording the media ID generated by the media ID generation unit into the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the information recording medium is executed. The information processing apparatus according to claim 6, wherein the information processing apparatus is configured. The information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System),
The information recording unit
It is configured to execute a process of recording an AACS (Advanced Access Content System) compatible media ID generated by the media ID generation unit and a VCPS compatible unique ID generated by a random number in the lead-in area of the information recording medium. The information processing apparatus according to claim 4, wherein The information recording medium is a DVD-R or DVD-RW or DVD-RAM medium having a recorded media ID as recording data.
The media ID generation unit
A configuration in which a media ID configuration bit generated by the media ID configuration information generation unit and a device ID, which includes a media ID configuration bit and 64-bit data, is generated as a media ID to be recorded on the information recording medium (medium). The information processing apparatus according to claim 1, wherein: The media ID generation unit
The media ID configuration information generation unit generated by the media ID configuration information generation unit, the device identifier, and other data are added to generate a write-once media ID consisting of 64-bit data. Item 10. The information processing device according to Item 9. The information recording unit
The information processing apparatus according to claim 9, wherein the information recording apparatus is configured to execute a process of recording a write-once media ID generated by the media ID generation unit in a lead-in area of an information recording medium. The information recording unit
The recording medium ID generated by the media ID generation unit is divided into a sector header (CPR_MAI) in an empty area of a lead-in area of an information recording medium, and is recorded. The information processing apparatus described in 1. An information processing device as a drive device that executes access to an information recording medium and executes data input / output between hosts,
A storage unit that stores a drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data;
A media ID configuration information generation unit that generates bit information that configures a media ID as a unique identifier corresponding to an information recording medium (media);
A media ID generating unit that generates data including a media ID configuration bit generated by the media ID configuration information generating unit and a drive ID acquired from the drive certificate as a media ID to be recorded on the information recording medium;
An information recording unit for recording the media ID generated by the media ID generation unit on an information recording medium;
An information processing apparatus comprising: The drive certificate is
A drive public key certificate storing a drive public key set corresponding to the drive device, wherein the media ID generation unit uses the drive ID recorded in the drive public key certificate The information processing apparatus according to claim 13, wherein the information processing apparatus is configured to execute a process of generating a message. The media ID configuration information generation unit is configured by a counter that generates a different counter value for each generation process of the media ID,
The media ID generation unit
14. The information processing apparatus according to claim 13, wherein the information including the counter value generated by the counter and the data including the drive ID is generated as a media ID to be recorded on the information recording medium. The media ID configuration information generation unit is configured by a random number generation unit that generates a random number,
The media ID generation unit
The information processing apparatus according to claim 13, wherein the random number generated by the random number generation unit and data including the drive ID are generated as a media ID recorded on the information recording medium (media). . The information recording medium is DVD + R or DVD + RW media,
The media ID generation unit
The media ID configuration information generation unit generates a media ID corresponding to AACS (Advanced Access Content System) including 128-bit data including the media ID configuration bit and the drive ID. The information processing apparatus according to claim 13. The media ID generation unit
A media ID configuration bit generated by the media ID configuration information generation unit, the drive ID, and other data are added to generate an AACS compatible media ID composed of 128-bit data. The information processing apparatus according to claim 17. The information recording unit
The information processing apparatus according to claim 17, wherein the information processing apparatus is configured to execute a process of recording a media ID generated by the media ID generation unit in a lead-in area of an information recording medium. The information recording unit
A process of dividing and recording the media ID generated by the media ID generation unit into the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the information recording medium is executed. The information processing apparatus according to claim 19, wherein the information processing apparatus is configured. The information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System),
The information recording unit
It is configured to execute processing for recording an AACS (Advanced Access Content System) compatible media ID generated by the media ID generation unit and a VCPS compatible unique ID generated by a random number in a lead-in area of the information recording medium. The information processing apparatus according to claim 17, characterized in that: The information recording medium is a DVD-R or DVD-RW or DVD-RAM medium having a recorded media ID as recording data.
The media ID generation unit
A configuration in which a media ID configuration bit generated by the media ID configuration information generation unit and a write-once media ID including 64-bit data including the drive ID are generated as a write-once media ID recorded on the information recording medium (medium). The information processing apparatus according to claim 13, wherein the information processing apparatus is an information processing apparatus. The media ID generation unit
The media ID configuration information generation unit generates the media ID configuration bit, the drive ID, and other data to generate a write-once media ID composed of 64-bit data. Item 22. The information processing device according to Item 22. The information recording unit
23. The information processing apparatus according to claim 22, wherein the information processing apparatus is configured to execute a process of recording a write-once media ID generated by the media ID generation unit in a lead-in area of an information recording medium. The information recording unit
25. The recording medium ID generated by the media ID generation unit is divided into a sector header (CPR_MAI) in an empty area of a lead-in area of an information recording medium, and is recorded. The information processing apparatus described in 1. An information processing apparatus for reading data from an information recording medium (media),
When recording or reproducing content using DVD + R or DVD + RW media having recorded media ID as recorded data, a recorded media ID corresponding to CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium and information recording An information processing apparatus comprising a media ID generation unit that generates a 128-bit AACS (Advanced Access Content System) compatible media ID based on an additional recording media ID recorded on a medium. The media ID generation unit
128-bit AACS compatible based on 64-bit CPRM-compatible media ID recorded in the burst cutting area (BCA) of the information recording medium and 64-bit additional recording media ID recorded in the lead-in area of the information recording medium 27. The information processing apparatus according to claim 26, wherein the information processing apparatus is configured to execute a process of generating a media ID. The information processing apparatus includes:
A data processing unit that executes recording of content on the information recording medium or content reproduction processing from the information recording medium;
The data processing unit
27. The information processing apparatus according to claim 26, wherein the information recording apparatus is configured to execute a content recording or reproduction sequence defined by AACS by applying a 128-bit media ID generated by the media ID generation unit. The information processing apparatus includes:
A drive device that executes access to an information recording medium and performs data input / output with a host.
27. A data output unit that executes a process of outputting a 128-bit media ID generated by the media ID generation unit to a host that executes a content recording or playback sequence defined by AACS. The information processing apparatus described in 1. An information recording medium (media) compliant with the DVD + R or DVD + RW standard,
Content recording or playback in accordance with AACS regulations by processing a media ID, which is a unique identifier of a 128-bit medium, recorded in a lead-in area of an information recording medium and applying the media ID in an information processing apparatus An information recording medium having a configuration that enables the The information recording medium is
31. The medium ID is divided and recorded in a sector header (RSV) of a second buffer zone [Lead-in Zone / Buffer Zone 2] in a lead-in area of an information recording medium. The information recording medium described in 1. The information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System),
31. The information recording medium according to claim 30, wherein the AACS-compatible media ID and a VCPS-compatible unique ID are recorded in the lead-in area. An information recording medium (media) compliant with the DVD-R, DVD-RW, or DVD-RAM standard,
A 64-bit recorded media ID corresponding to CPRM (Content Protection for Recordable Media) is recorded in the burst cutting area (BCA) as recording data, and an additional recording medium ID, which is a 64-bit media-specific identifier, is recorded in the lead-in area. As
An information recording medium having a configuration capable of recording or reproducing content in accordance with AACS regulations by a 128-bit media ID generation process using a pre-recorded media ID and the additional recording media ID in an information processing apparatus . The information recording medium is
34. The information recording medium according to claim 33, wherein the additional recording medium ID is divided and recorded in a sector header (CPR_MAI) of a lead-in area of the information recording medium. In the information processing apparatus, an information processing method for executing processing for recording a media ID as a unique identifier corresponding to an information recording medium (media) on the information recording medium
A medium ID configuration information generation unit for generating configuration information of a medium ID as a unique identifier corresponding to an information recording medium (medium);
The media ID generation unit reads the device identifier from a storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus, and includes the media ID configuration information and data including the device identifier. A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step in which the information recording unit records the media ID generated by the media ID generation unit on an information recording medium;
An information processing method characterized by comprising: The media ID configuration information generation step includes:
36. The information processing method according to claim 35, wherein the media ID configuration information is generated by a counter that generates a different counter value for each media ID generation process. The media ID configuration information generation step includes:
36. The information processing method according to claim 35, comprising a step of using a random number generated by a random number generation unit as the media ID configuration information. The information recording medium is DVD + R or DVD + RW media,
The media ID generation step includes:
36. The information processing method according to claim 35, wherein the media ID configuration information and the device identifier are included, and an AACS (Advanced Access Content System) compatible media ID consisting of 128-bit data is generated. . The media ID generation step includes:
A step of generating a media ID corresponding to AACS composed of 128-bit data by adding the media ID configuration bit generated by the media ID configuration information generation unit, the device identifier, and other data. The information processing method according to claim 38. The information recording step includes
39. The information processing method according to claim 38, wherein the information processing method is a step of executing a process of recording the media ID generated in the media ID generation step in a lead-in area of the information recording medium. The information recording step includes
A process of dividing and recording the media ID generated in the media ID generation step into the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the information recording medium is executed. The information processing method according to claim 40, wherein the information processing method is a step of The information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System),
The information recording step includes
A step of executing a process of recording an AACS (Advanced Access Content System) compatible media ID generated in the media ID generation step and a VCPS compatible unique ID generated by a random number in a lead-in area of the information recording medium. 39. The information processing method according to claim 38. The information recording medium is a DVD-R or DVD-RW or DVD-RAM medium having a recorded media ID as recording data.
The media ID generation step includes:
A media ID configuration bit generated in the media ID configuration information generation step and an additional recording media ID including 64-bit data including the device identifier are generated as an additional recording media ID recorded on the information recording medium (medium). 36. The information processing method according to claim 35, wherein the information processing method is a step. The media ID generation step includes:
A media ID configuration bit generated in the media ID configuration information generation step, the device identifier, and other data are added to generate a write-once media ID consisting of 64-bit data. The information processing method according to claim 43. The information recording step includes
44. The information processing method according to claim 43, which is a step of executing a process of recording the additional recording media ID generated in the media ID generation step in a lead-in area of an information recording medium. The information recording step includes
The recordable media ID generated in the media ID generating step is a step of executing a process of dividing and recording into a sector header (CPR_MAI) of an empty area of a lead-in area of an information recording medium. 45. The information processing method according to 45. An information processing method executed in a drive device that executes access to an information recording medium and executes data input / output between hosts,
A medium ID configuration information generation unit that generates configuration information of a medium ID that is a unique identifier corresponding to an information recording medium (medium);
The media ID generator
A drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data is read from a storage unit, and the media ID configuration information and data including the drive ID are stored in the information A medium ID generating step for generating a medium ID to be recorded on the recording medium;
An information recording step in which the information recording unit records the media ID generated by the media ID generation unit on an information recording medium;
An information processing method characterized by comprising: The drive certificate is
A drive public key certificate storing a drive public key set corresponding to the drive device, wherein the media ID generation step uses the drive ID recorded in the drive public key certificate 48. The information processing method according to claim 47, wherein the information processing method is a step of generating. The media ID configuration information generation step includes:
48. The information processing method according to claim 47, wherein the media ID configuration information is generated by a counter that generates a different counter value for each media ID generation process. The media ID configuration information generation step includes:
48. The information processing method according to claim 47, wherein the random number generated by the random number generation unit is used as the media ID configuration information. The information recording medium is DVD + R or DVD + RW media,
The media ID generation step includes:
A step of generating an AACS (Advanced Access Content System) compatible media ID including 128-bit data including the media ID configuration information generated by the media ID configuration information generation unit and the drive ID. The information processing method according to claim 47. The media ID generation step includes:
A step of generating an AACS-compliant media ID composed of 128-bit data by adding the media ID configuration bit generated by the media ID configuration information generation unit, the drive ID, and other data. The information processing method according to claim 51. The information recording step includes
52. The information processing method according to claim 51, wherein the information processing method is a step of executing a process of recording the media ID generated in the media ID generation step in a lead-in area of an information recording medium. The information recording step includes
A process of dividing and recording the media ID generated in the media ID generation step into the sector header (RSV) of the second buffer zone [Lead-in Zone / Buffer Zone 2] in the lead-in area of the information recording medium is executed. 54. The information processing method according to claim 53, wherein the information processing method comprises: The information recording medium is a DVD + R or DVD + RW medium compatible with VCPS (Video Content Protection System),
The information recording step includes
A step of executing a process of recording an AACS (Advanced Access Content System) compatible media ID generated in the media ID generation step and a VCPS compatible unique ID generated by a random number in a lead-in area of the information recording medium. 52. The information processing method according to claim 51, wherein: The information recording medium is a DVD-R or DVD-RW or DVD-RAM medium having a recorded media ID as recording data.
The media ID generation step includes:
A media ID configuration bit generated in the media ID configuration information generation step and a media ID configuration bit including the drive ID and including a 64-bit data as a media ID to be recorded on the information recording medium (media) are generated. The information processing method according to claim 47, wherein the information processing method is a step. The media ID generation step includes:
The media ID configuration information generating step includes a media ID configuration bit, the drive ID, and a step of generating additional recording media ID composed of 64-bit data by adding other data. The information processing method according to claim 56. The information recording step includes
57. The information processing method according to claim 56, which is a step of executing a process of recording the additional recording media ID generated by the media ID generation unit in a lead-in area of an information recording medium. The information recording step includes
The recordable media ID generated in the media ID generating step is a step of executing a process of dividing and recording into a sector header (CPR_MAI) of an empty area of a lead-in area of an information recording medium. 58. The information processing method according to 58. An information processing method in an information processing apparatus for reading data from an information recording medium (media),
When the media ID generation unit records or reproduces content using a DVD + R or DVD + RW media having a recorded media ID as recording data, the recording is performed in accordance with CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium. An information processing method comprising: executing a media ID generation step of generating a 128-bit AACS (Advanced Access Content System) compatible media ID based on the media ID and the additional recording media ID added to the information recording medium . The media ID generation step includes:
128-bit AACS support based on 64-bit CPRM-compatible media ID recorded in the burst cutting area (BCA) of the information recording medium and 64-bit additional recording media ID recorded in the lead-in area of the information recording medium The information processing method according to claim 60, wherein the information processing method is a step of executing a process of generating a media ID. The information processing method further includes:
The data processing unit has a data processing step of executing content recording on the information recording medium or content reproduction processing from the information recording medium,
The data processing step includes
61. The information processing method according to claim 60, which is a step of executing a content recording or reproduction sequence defined by AACS by applying the 128-bit media ID generated in the media ID generation step. In the information processing apparatus, a computer program for executing a process of recording a media ID as a unique identifier corresponding to an information recording medium (medium) on the information recording medium,
A media ID configuration information generating step for causing the media ID configuration information generation unit to generate configuration information of the media ID as a unique identifier corresponding to the information recording medium (medium);
The media ID generation unit is caused to read the device identifier from a storage unit that stores a device identifier that is a unique identifier set corresponding to the information processing apparatus, and the media ID configuration information and data including the device identifier are stored. A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step for causing the information recording unit to record the media ID generated by the media ID generation unit on the information recording medium;
A computer program for executing A computer that executes a process of recording a media ID as a unique identifier corresponding to an information recording medium (medium) on the information recording medium in a drive device that executes access to the information recording medium and executes data input / output between hosts A program,
A medium ID configuration information generating unit that generates media ID configuration information that is configuration information of a media ID as a unique identifier corresponding to an information recording medium (medium);
In the media ID generator,
A drive certificate (Drive Certificate) including a drive ID, which is a unique identifier set corresponding to the drive device, as recording data is read from a storage unit, and the media ID configuration information and data including the drive ID are A medium ID generating step for generating a medium ID to be recorded on the information recording medium;
An information recording step of causing the information recording unit to record the media ID generated by the media ID generation unit on the information recording medium;
A computer program for executing A computer program that causes an information processing device that reads data from an information recording medium (medium) to execute media ID generation processing,
When recording or playing back content using a DVD + R or DVD + RW media having a recorded media ID as recording data in the media ID generation unit, the recording is performed in accordance with CPRM (Content Protection for Recordable Media) recorded in advance on the information recording medium. A computer program for executing a media ID generation step for generating a 128-bit AACS (Advanced Access Content System) compatible media ID based on the media ID and the additional recording media ID added to the information recording medium .

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