JP2004296006A - Optical disk, optical disk device, copy management device, program, recording medium - Google Patents

Abstract

An optical disk device prevents unauthorized copying and enables private copying within a legal range.
A content is encrypted and recorded on an optical disc, and copy management information including an encryption key and a permitted number of copies is recorded on an RF tag IC embedded in the optical disc. In copying an optical disk, if the permitted number of copies is 1 or more, the player reads the content and the copy management information from the optical disk, and outputs the content after reducing the permitted number of copies by one. The recorder writes the encrypted content as it is on the optical disc, and writes the copy management information on the RF tag IC. Further, a unique ID for specifying the user is obtained from the ID device, and is written to the RF tag IC on the optical disc as a permission ID. At the time of reproduction, the player performs authentication using the permission ID and the unique ID recorded on the RF tag IC.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for performing duplication management (prevention of unauthorized copying) and charging management when distributing, selling, or renting copyrighted works such as music contents, video contents, and software programs to the general public, using an optical disk or the like as a medium.
[0002]
[Prior art]
In recent years, digitally recorded content recorded on recording media such as CDs has been digitally read using a CD-ROM drive, copied using a CD-R drive, etc., and illegally copied or sold to others. Has become a problem. Digital recording media, such as CDs, are particularly problematic because quality does not deteriorate when copied, and unauthorized copying can be performed at low cost without special equipment or knowledge due to the spread of personal computers and CD-Rs. .
On the other hand, conventionally, to prevent illegal copying of contents digitally recorded on a recording medium such as an optical disk, an ID chip is provided at a specific location on the optical disk, and the number of times that the ID chip can be copied is reduced every time it is copied. There is known a method of overwriting and updating the data, and prohibiting the copying if the allowable number of times of copying is 0 (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-175663 (page 5, FIG. 1)
[0004]
FIG. 14 shows the structure of a conventional optical disk. The optical disk 1401 is composed of a content recording area 1402 and an ID chip 1403.
The content recording area 1402 is a recording area of the content distributed from the copyright holder on the recorded optical disk, and is similar to a conventional CD-ROM or the like. A recordable optical disc is an area for a user to record contents, and is similar to a conventional CD-RW or the like.
The ID chip 1403 is a semiconductor chip that records the number of copies of the content recorded in the content recording area 1402, an ID code, and the like. The ID chip 1403 generates power by receiving a laser beam emitted by a laser big-up of the optical disk drive, and drives the light emitting element in the ID chip 1403 by using the laser power as a power source to transmit recorded data to the laser of the optical disk drive. This is to make the pickup read.
[0005]
FIG. 15 shows a procedure for legally copying content according to the related art.
Reference numeral 1501 denotes a record sales company that produces and sells an optical disk on which music content and the like are recorded; 1502, a recorded optical disk sold by the record sales company 1501; 1503, a player for reproducing the content recorded on the recorded optical disk 1502; Reference numeral 1504 denotes a recorder that records contents on a recordable optical disk 1505, and reference numeral 1505 denotes a recordable optical disk that records copied contents. To duplicate the recorded optical disk 1502, the player 1503 and the recorder 1504 are connected. The player 1503 and the recorder 1504 are both optical disk drives, but are described separately from “player” and “recorder” due to their different roles in duplicating an optical disk such as reproduction and recording.
[0006]
Copying of content protected by copyright, such as a CD, according to this conventional technique is performed as follows.
First, the record sales company 1501 records the content in the content recording area 1402 (1511), records the predetermined number of permitted copies and the ID code on the ID chip 1403 (1512), and produces and sells the recorded optical disk 1502. I do.
The user purchases the recorded optical disk 1502 and inserts it into the player 1503. Also, the recordable optical disk 1505 is inserted into the recorder 1504 connected to the player 1503, and the copy start is instructed to the player 1503 and the recorder 1504.
When the player 1503 is instructed to start copying, the player 1503 reads an ID code from the ID chip of the recorded optical disk 1502.
The ID chip 1403 of the recorded optical disk 1502 determines that copying is permitted when the permitted number of copies is 1 or more, and outputs the ID code recorded therein. Further, the number of times of copying is reduced by one and recorded in the self. If the permitted number of copies has already been 0, it is determined that copying is no longer permitted and no ID code is output (1513).
[0007]
When a valid ID code is obtained, the player 1503 digitally reads out the content recorded in the content recording area 1402 of the recorded optical disk 1502 and outputs it to the recorder 1504 (1514). If a valid ID code cannot be obtained, it is determined that copying of the recorded optical disk 1502 is not permitted, and copying is interrupted.
The recorder 1504 records the content input from the player 1503 in the content recording area 1402 of the recordable optical disk 1505 (1515).
In this way, the copy management of the content protected by the copyright is performed.
[0008]
[Problems to be solved by the invention]
In such a conventional copy management method, since the ID chip 1403 of the recorded optical disk 1502 uses a laser pickup to read and write copy management information such as the number of copies that can be performed, as in the case of the content recording area 1402, This makes it easy to access the file, and illegal copying can be easily performed by copying the entire copy management information. Further, since the content is recorded in the content recording area 1402 as it is, illegal copying can be easily performed by reading only the content recording area 1402 without accessing the ID chip 1403 of the recorded optical disk 1502 at all.
Private duplication limited to personal use, such as making a backup or duplicating from a CD to an SD memory card to a different medium, is a legal act. The creation of a copy also reduces the number of copies that can be made, that is, is subject to billing, and therefore has the disadvantage of being inconvenient for the user.
[0009]
[Means for Solving the Problems]
In order to solve this problem, a first invention related to an optical disc is an optical disc storing content and copy management information for performing copy management of the content, wherein the copy management information is different from the content. An access method is used.
According to a second invention, in the first invention, the content is recorded in an encrypted form.
In a third aspect based on the first aspect, the copy management information is accessed by wireless communication.
[0010]
Further, a fourth invention relating to an optical disc device, comprises: content access means for accessing the content in order to access an optical disc storing content and copy management information for performing copy management of the content; And a copy management information access means for accessing the content management means, wherein the copy management information access means uses an access method different from the content access means.
According to a fifth aspect, in the fourth aspect, the content is encrypted and recorded, and further includes a decryption unit for decrypting the content read by the content access unit. And
In a sixth aspect based on the fourth aspect, the copy management information access means accesses the copy management information by wireless communication.
In a seventh aspect based on the fourth aspect, the copy management information includes the number of times the content can be copied, and the copy management information access means reads out and updates the number of times the content can be copied. It is characterized by recording.
In an eighth aspect based on the fourth aspect, the copy management information includes a permission ID for identifying an owner of the content, and a unique ID for identifying the owner of the content. A unique ID acquisition unit for acquiring an ID, and a permission ID recording unit for generating a permission ID from the unique ID and recording the permission ID in the copy management information.
In a ninth aspect based on the fourth aspect, the copy management information includes a permission ID for identifying an owner of the content, and a unique ID for identifying a user of the content. A unique ID acquisition unit for acquiring an ID, and a permission ID from the copy management information access unit, and perform authentication with the permission ID and the unique ID obtained from the unique ID acquisition unit. Authorization ID authentication means for controlling access to the content by the access means.
[0011]
Further, a tenth invention relating to a copy management device is a copy management device for accessing an optical disk storing content and copy management information including the number of copies that can be performed for content copy management. Input means for inputting the number of possible copies as the number of purchase copies, purchase copy number counting means for counting the number of purchase copies, output means for outputting the total number of purchase copies, and the number of times the purchase copy number can be copied And a copy management information access means for recording the copy management information in the copy management information.
In an eleventh aspect based on the tenth aspect, the copy management information access means accesses the copy management information by wireless communication.
[0012]
A twelfth aspect of the present invention relates to a program for accessing a content to access an optical disk storing content and copy management information for performing copy management of the content. A program for functioning as copy management information access means for accessing management information, wherein the copy management information access means uses an access method different from the content access means.
According to a thirteenth invention, in order to access an optical disk storing content and copy management information including a copy permitted number for performing copy management of the content, the computer is operated by setting the desired copy permitted count of the user to the purchase copy count. Input means for inputting the number of purchase copies, a purchase copy number totalizing means for counting the number of purchased copies, an output means for outputting the total number of purchased copies, and recording the number of purchased copies in the copy management information as a possible copy number. It is characterized by functioning as copy management information access means.
[0013]
A fourteenth invention related to a recording medium is a computer-readable recording medium recording a program relating to a method for accessing an optical disk storing content and copy management information for performing copy management of the content, A program for causing a computer to execute a content access step of accessing the content and a copy management information access step of accessing the copy management information using an access method different from the content access step is recorded. And
A fifteenth invention is a computer-readable recording medium recording a program related to a method of accessing an optical disc storing content and copy management information including a copy permitted number for performing content copy management, An input step for inputting a user-desirable copy count as a purchase copy count, a purchase copy count counting step for counting the purchase copy count, an output step for outputting the count of purchase copy counts, and the purchase copy count And a copy management information accessing step of recording in the copy management information as a copy permitted number.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1 is a diagram showing a configuration of an optical disk used in the present embodiment. The optical disc 101 shown in (a) supplies power to a content recording area 102 in which encrypted content is recorded, an RF tag IC 103 for recording copy management information, and an RF tag IC 103 for performing communication. Antenna 104.
FIG. 1B shows the structure of an optical disk in another form, and the same components as those in FIG. 1A are given the same numbers. The optical disk 111 shown in (b) comprises a content recording area 102 and a magnetic tape 112 for recording copy management information. The optical disc 101 shown in FIGS. 1A and 1B differs only in the physical form of the medium on which the copy management information is recorded.
Like the existing CDs and DVDs, the content recording areas 102 of the optical discs 101 and 111 include not only read-only contents in which contents such as music titles and movie titles are recorded by press at the time of production, but also CD-Rs and DVD-Rs. For example, a rewritable device such as a CD-RW and a DVD-RAM can be freely erased and written.
[0015]
In FIG. 1A, the antenna 104 is mounted in a circular shape along the inside of the content recording area 102. However, the antenna 104 is mounted in a circular shape along the outside of the content recording area 102. Any other shape may be used as long as it is shaped.
FIG. 2 is a diagram showing a configuration of an optical disk drive used in the present embodiment. The optical disk drive 201 has a configuration in which a duplication control unit 203 is added to an existing CD-RW configuration unit 202 having the same configuration as a conventional CD-R drive or CD-RW drive.
The existing CD-RW configuration unit 202 includes a controller 204 that controls the entire operation, a spindle motor that rotates the optical disk at a predetermined rotation speed, a laser pickup that reads and writes contents on the optical disk using a laser, and the like. A content access unit 205, an analog I / F 206 for converting the content digitally recorded on the optical disc into an analog signal and outputting the analog signal, and a digital I / F 206 for receiving a command from an external device connected to the optical disc drive 201 and inputting / outputting digital data. / F207.
The copy control unit 203 includes a copy management information access unit 208 for reading and writing the copy management information recorded on the optical disc, and a decryption unit 209 for decrypting the encrypted content.
[0016]
In an optical disk drive corresponding to the optical disk 101 shown in FIG. 1A, the copy management information access unit 208 communicates with the RF tag IC 103 on the optical disk 101. The corresponding optical disk drive is a magnetic tape reader / writer for reading and writing the magnetic tape 112 on the optical disk 111.
[0017]
FIG. 3 is a diagram showing the configuration of the copy management device used in the present embodiment. A copy management device 301 controls a controller 302 that controls the operation of the entire copy management device 301, a user I / F 303 for an operator to operate, a network I / F 304 for connecting to a network, and read and write copy management information for an optical disk. And a purchased copy number totaling unit 306 for counting and recording the number of purchased copies, which is the number of times the user desires to copy.
The copy management information access unit 305 is, like the copy management information access unit 208 of the optical disk drive shown in FIG. 2, in the optical disk drive corresponding to the optical disk 101 shown in FIG. In the optical disk drive corresponding to the optical disk 111 shown in FIG. 1B, it is a magnetic tape reader / writer for reading and writing the magnetic tape 112 on the optical disk 111.
[0018]
FIG. 4 shows the data structure of the copy management information written on the RF tag IC 103 or the magnetic tape 112. The copy management information 401 includes a content ID 402 for identifying the content written in the content recording area 102, a copy permitted number 403 which is the number of times the content written in the content recording area 102 is permitted to be copied, and It is composed of an encryption key 404 used for encryption, charging information 405 such as a fee for copying, and a permission ID 406 described later.
[0019]
Next, a procedure of copying a recorded optical disk by a user will be described.
FIG. 5 is a diagram showing a procedure for copying a recorded optical disc according to the present embodiment. The description of the same components as those in FIG. 15 is omitted, and the same reference numerals are given.
Reference numeral 501 denotes a record sales company that produces and sells an optical disk on which music content or the like is recorded, 502 denotes a read-only optical disk sold by the record sales company 501, 503 denotes a player for reproducing the content recorded on the optical disk 502, and 504. Is a recorder for recording contents on the recordable optical disk 505, and 505 is a recordable optical disk for recording copied contents. In order to copy the recorded optical disk 502, the digital I / F 207 of the player 503 and the digital I / F 207 of the recorder 504 are connected. Both the player 503 and the recorder 504 are the optical disk drives shown in FIG. 2, but they are described separately from “player” and “recorder” due to the difference in their roles in duplicating the optical disk such as reproduction and recording.
[0020]
First, the record sales company 501 records the encrypted content in the content recording area 102 of the optical disk (1511), and writes the copy management information 401 in the RF tag IC 103 or the magnetic tape 112 using the copy management device 301 ( 511), sold as a recorded optical disk 502.
In writing the copy management information 401, the controller 302 of the copy management device 301 transmits the content ID, the permitted number of copies, the encryption key, the billing information, and the permission ID input from the user I / F 303 via the copy management information access unit 305. To write on the recorded optical disk 502.
The user obtains the recorded optical disk 502 by a method such as purchase / rental and inserts it into the player 503. Further, the recordable optical disk 505 is inserted into the recorder 504, and the player 503 and the recorder 504 are instructed to start copying.
When the player 503 is instructed to start duplication, the controller 204 instructs the duplication management information access unit 208 to read out the permitted number of duplications from the recorded optical disk 502. The controller 204 determines that copying is permitted when the read possible number of times is 1 or more, and subtracts 1 from the read possible number of times of copying. Recording is performed on the recorded optical disk 502 (512). Further, the controller 204 controls the content access unit 205 to read the encrypted content recorded in the content recording area of the recorded optical disk 502 and output the encrypted content from the digital I / F 207 to the recorder 504 while being encrypted (1514). ).
[0021]
In the player 503, the controller 204 further reads out the copy management information from the recorded optical disk 502 via the copy management information access unit 208, changes the number of possible copies to 0, and outputs it from the digital I / F 207 to the recorder 504 ( 513).
If the permitted number of copies read from the recorded optical disc 1502 is already 0, the controller 204 determines that the copy is not permitted and suspends the copy.
In the recorder 504, the controller 204 controls the content access unit 205 to record the encrypted content input from the player 503 in the content recording area of the recordable optical disk 505 as it is encrypted (1515). Further, the controller 204 records the copy management information input from the player 503 via the copy management information access unit 208 on the recordable optical disk 505 (514).
Next, a description will be given of a procedure in which a record sales company collects a copyright fee for a rental operation of an optical disk performed by a rental business store.
[0022]
FIG. 6 is a diagram showing a procedure in which the record sales company collects a copyright fee from a rental shop in the present embodiment. The same components and procedures as those in FIG. 15 or FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 601 denotes a record sales company that produces an optical disk on which music content and the like are recorded. Reference numeral 502 denotes a read-only optical disk produced by the record sales company 601. Reference numeral 602 denotes a rental store that rents the optical disk 502 to a general consumer. .
First, the record sales company 601 records the encrypted content in the content recording area 102 of the optical disc (1511), and writes the copy management information 401 on the RF tag IC 103 or the magnetic tape 112 by using the copy management device 301 ( 511), sell it as a recorded optical disk 502 to the rental business store 602.
Using the copy management device 301, the rental office 602 writes the number of purchase copies, which is the number of times the user wants to make a copy, to the recorded optical disc 502 as the number of possible copies (611).
[0023]
When the number of purchased copies requested by the user is input to the user I / F 303 of the copy management device 301 by the operator of the rental office 602, the controller 302 of the copy management device 301 records the number via the copy management information access unit 305. In the copy management information 401 of the optical disk 502, the number of times of copy 403 is written. The number of purchased copies written on the recorded optical disc 502 is counted by the number-of-purchases-counting unit 306 for each content ID (612). The number of purchased copies thus aggregated is periodically read from the number-of-purchased copies aggregation unit 306 by the controller 302 of the copy management apparatus 301, and is reported to the record sales company 601 via the network I / F 304. .
The record sales company 601 charges the rental business office 602 based on the number of purchased copies reported from the rental business office 602 (613).
The user can make a copy from the recorded optical disc 502 by the procedure shown in FIG.
[0024]
Next, a procedure in which a user reproduces a recorded optical disk will be described.
FIG. 7 is a diagram showing a procedure for reproducing a recorded optical disc according to the present embodiment. The same components and procedures as those in FIG. 15 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 701 denotes a recorded optical disk on which content and copy management information are recorded, and 702 denotes a player for reproducing the content recorded on the recorded optical disk 701.
First, the user inserts the recorded optical disk 701 into the player 702 and instructs the player 702 to reproduce.
When the player 702 is instructed to reproduce, the controller 204 reads out the encryption key 404 in the copy management information 401 of the recorded optical disk 701 via the copy management information access unit 208 (711). Next, the controller 204 of the player 702 controls the content access unit 205 to read the content from the content recording area 102 (1514), and the decryption unit 209 decrypts the content using the encryption key 404 (712). The signal is output from the analog I / F 206 as a signal.
The user can reproduce the recorded optical disk 701 without distinction whether it is a read-only optical disk sold by a record sales company or an optical disk duplicated by the procedure shown in FIG.
[0025]
Next, a description will be given of a procedure in which the user purchases a new copy permitted number of times online from a record sales company.
FIG. 8 is a diagram showing a procedure of the present embodiment in which a user purchases a new copy permitted number of times online.
Reference numeral 801 denotes a record sales company that produces an optical disk on which music content or the like is recorded, 802 denotes a read-only optical disk produced by the record sales company 801, and 803 denotes the optical disk drive shown in FIG.
First, the user operates a user I / F (not shown) of the optical disk drive 803 to instruct purchase of a new number of possible copies, and the number of purchase copies, which is the number of times the user desires to newly purchase, is displayed. When input, the controller 204 of the optical disc drive 803 controls the copy management information access unit 208 to read out the content ID 402 in the copy management information 401 of the optical disc 802 (811). Subsequently, the controller 204 of the optical disk drive 803 performs a purchase / authentication procedure with the record sales company 801 via a network such as the Internet via a network I / F (not shown) (812, 813). First, the controller 204 of the optical disk drive 803 notifies the record sales company 801 of a request to purchase a new number of copies that can be made, together with the read content ID 401 and the number of copies purchased by the user (814).
[0026]
When the record sales company 801 receives the request to purchase a new number of copies, the accounting information is generated from the content ID and the number of copies to be purchased, and transmitted to the optical disk drive 803 via the network (815).
Upon receiving the billing information 815, the optical disk drive 803 asks the user to confirm the purchase via the user I / F (not shown), and when the intention of the user is confirmed, the controller 204 notifies the record sales company 801 of the fact. Notification is made (816).
Upon receiving the purchase confirmation 816 from the optical disk drive 803, the record sales company 801 performs accounting processing based on the accounting information 815, and transmits the accounting confirmation to the optical disk drive 803 (817).
When the accounting / authentication process is completed between the record sales company 801 and the optical disk drive 803 in this way, and the optical disk drive 803 receives the accounting confirmation 817, the controller 204 of the optical disk drive 803 controls the duplication management of the optical disk 802 until then. The number of purchased copies is added to the permitted number of copies 403 recorded in the information 401, and the copy management information access unit 208 is controlled to write and update the copy management information 401 in the optical disk 802 (818).
[0027]
By the above-described apparatus configuration and procedure, the copy management information 401 such as the encryption key 404 is recorded in a recording area having a physical access method different from that of the content recording area 102, thereby making it difficult to access the copy management information 401. It is possible to prevent illegal copying of the content recorded in the content recording area 102. Further, by encrypting the content recorded in the content recording area 102 of the optical disc, the effect of preventing illegal copying of the content can be further improved.
Also, the number of permitted duplications is recorded on the optical disc as the number of permitted duplications 403, and duplication is permitted within the range indicated by the permitted number of duplications 403. Enables creation of In particular, in a rental shop or the like, when the optical disk is rented, the copy management device 301 installed in the shop rewrites the number of times that the copy can be made, thereby controlling the number of times a legal copy is made and preventing illegal copying. Further, the copy management device 301 counts the number of times the number of times the copy can be performed 403 is rewritten, so that the record sales company can collect an accurate copyright fee for a copy production act even in a rental business. Become. Also, since the totaling result of the rewriting status of the number of possible copies 403 indicates the user's content usage status as it is, the record sales company can quickly and accurately know the user's preference based on this totaling result. Is also obtained.
[0028]
In particular, as shown in FIG. 1A, when the copy management information is recorded on the RF tag IC and accessed by short-range wireless communication, the copy management is performed even when the optical disc is placed in a protective medium such as a plastic case that allows radio waves to pass. Since information can be accessed, rental shops can perform operations such as identifying content and updating duplication management information while keeping the case in place, improving the convenience of rental shops and improving the users of rental shops. The effect of shortening the waiting time can also be obtained.
Further, by charging and authenticating online and rewriting the number of permitted copies 403, the user can purchase a new right to make a legal copy from a record sales company simply by preparing an Internet connection environment, etc. User convenience is improved.
In the present embodiment, it has been described that the number of possible copies 403 is calculated by the controller 204 of the optical disk drive after updating and is written into the copy management information 401 (512, 818), but is not shown in the RF tag IC 103. The updated value may be calculated by the controller and the copy management information 401 may be updated.
Since illegal copying is prevented by encrypting and recording the content, the method of accessing the content recording area 102 uses a conventional optical disk such as a CD or DVD, thereby reducing the use of the optical disk drive according to the present embodiment. The development / manufacturing cost can be reduced and the price increase can be suppressed, and the optical disk drive according to the present embodiment can access a conventional optical disk such as a CD or a DVD, so that the convenience of the user is not impaired. .
[0029]
In the present embodiment, an example is shown in which two optical disk drives, a player and a recorder, are used for copying. However, one optical disk drive and a personal computer are used, and the content read out by the optical disk drive is temporarily used by the personal computer. After storing the data on a hard disk or the like, the data may be recorded on the recordable optical disk inserted from the hard disk into the optical disk drive. Even in this case, since the content is encrypted, it cannot be reproduced as it is, and illegal copying can be prevented.
If the content of the recorded optical disk 502 has no restriction on digital duplication, the recorder 504 records the content input from the player 503 and the duplication management information 401 as they are on the recordable optical disk 505. The recordable optical disk 505 duplicated in this manner is an optical disk that can be re-digitally duplicated, like the recorded optical disk 502.
Note that the recordable optical disc 505 includes a writable disc, a freely erasable / writable disc, and the like. The recorded optical disk 502 may be not only a read-only one in which contents such as a music title and a movie title are recorded by a press at the time of production but also a readable and writable one.
As the encryption technique used in the decryption unit 209, an existing encryption technique such as AES (Advanced Encryption Standard) can be used.
[0030]
(Embodiment 2)
Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 9 to 13.
FIG. 9 is a diagram showing a configuration of an ID device used in the present embodiment. An ID device is a device that records a unique ID for performing user authentication. The ID device 901 includes a wireless unit 902 for communicating with the optical disk drive, and a unique ID recording unit 903 that records an ID unique to each ID device.
[0031]
FIG. 10 is a diagram showing a configuration of an optical disk drive used in the present embodiment. The description of the same components as those in FIG. 2 is omitted, and the same reference numerals as in FIG. 2 are assigned. The optical disk drive 1001 shown in FIG. 10 includes a private copy authentication unit 1002.
The private copy authentication unit 1002 includes a unique ID acquisition unit 1003 that acquires a unique ID from the ID device 901, a permission ID recording unit 1004 that controls the permission ID to be recorded on the optical disc, and a permission ID that reads the authorization ID from the optical disc and performs authentication. An authentication unit 1005 is provided.
The procedure for copying a recorded optical disk by the user is the same as in the first embodiment, and a description thereof will be omitted.
Next, a procedure for a user to make a private copy of an optical disk will be described.
Since a user who owns a recorded optical disc protected by copyright has the right to copy the recorded optical disc within the range of personal use, first identify the user who is the owner of the recorded optical disc. Record information for Here, since the user is identified by the unique ID of the ID device 901, by recording this unique ID on the recorded optical disc, it becomes possible to associate the recorded optical disc with its owner.
[0032]
FIG. 11 is a diagram showing a procedure for recording the owner's unique ID on a recorded optical disc according to the present embodiment. The same components and procedures as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 1101 denotes the optical disk drive of the present embodiment shown in FIG. 10, and 1102 denotes the ID device shown in FIG.
First, the user inserts the recorded optical disk 502 into the optical disk drive 1101, and operates a user I / F (not shown) of the optical disk drive 1101 to instruct recording of the unique ID.
When instructed to record the unique ID, the optical disk drive 1101 communicates with the ID device 1102 of the user via the unique ID acquisition unit 1003, and acquires the unique ID recorded in the unique ID recording unit 903. Is the permission ID (1111). Further, the controller 204 controls the permission ID recording unit 1004 to write the obtained permission ID as the permission ID 406 in the copy management information 401 of the recorded optical disk 502 via the copy management information access unit 208 (1112).
In this way, the owner can be identified from the recorded optical disk on which the permission ID 406 has been written in the procedure shown in FIG. 11, so that a private copy can be created. That is, creation of a copy is permitted without reducing the number of times 403 that can be copied.
[0033]
FIG. 12 is a diagram showing a procedure for creating a private copy according to the present embodiment. The same components and procedures as those in FIG. 5, FIG. 11, or FIG. 15 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 1201 denotes an optical disk on which a content ID is recorded in accordance with the procedure shown in FIG. 11, 1202 denotes a player for reproducing the content recorded on the optical disk 1201, and 1203 denotes a recordable optical disk for recording the copied content. It is. The digital I / F 207 of the player 1202 and the digital I / F 207 of the recorder 504 are connected to copy the recorded optical disk 1201 on which the permission ID is recorded. Although both the player 1202 and the recorder 504 are the optical disk drives shown in FIG. 10, they are distinguished from "player" and "recorder" due to their different roles in duplicating the optical disk such as reproduction and recording.
[0034]
First, the user inserts the recorded optical disk 1201 on which the permission ID 406 has been written into the player 1202. Also, the recordable optical disk 1203 is inserted into the recorder 504, and the start of copying is instructed to the player 1202 and the recorder 504.
When the player 1202 is instructed to start copying, the permission ID authentication unit 1005 controls the copy management information access unit 208 to read the permission ID 406 from the recorded optical disc 1201 (1211). If the permission ID 406 can be read out, the device communicates with the ID device 1102 via the unique ID acquisition unit 1003 to acquire a unique ID, and performs ID authentication by comparing the permission ID 406 with the unique ID (1212). If the ID authentication (1212) succeeds, the controller 204 controls the content access unit 205 to read the encrypted content recorded in the content recording area 102 of the recorded optical disc 1201 and to read the encrypted digital I / F 207 as it is. Is output to the recorder 504 (1514).
In the player 1202, the controller 204 further reads the copy management information 401 from the recorded optical disc 1201 via the copy management information access unit 208, changes the number of possible copies to 0, and outputs it from the digital I / F 207 to the recorder 504. (513).
[0035]
If a valid permission ID 406 cannot be read from the recorded optical disc 1201 or if an ID device 1102 having a unique ID that matches the read permission ID 406 cannot be detected, the controller 204 cannot permit private duplication. Judgment is made, and copying is performed according to the procedure shown in FIG.
In the recorder 504, the controller 204 controls the content access unit 205 to record the encrypted content input from the player 1202 in the content recording area 102 of the recordable optical disk 1203 in an encrypted state (1515). Further, the controller 204 records the copy management information input from the player 1202 via the copy management information access unit 208 on the recordable optical disk 1203 (514).
[0036]
Next, a procedure in which a user reproduces a recorded optical disk will be described.
FIG. 13 is a diagram showing a procedure for reproducing a recorded optical disc according to the present embodiment. The same components and procedures as those in FIG. 7, FIG. 11, FIG. 12, or FIG. 15 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 1301 denotes a recorded optical disk on which content and copy management information are recorded, and 1302 denotes a player for reproducing the content recorded on the optical disk 1301.
[0037]
First, the user inserts the recorded optical disc 1301 into the player 1302 and instructs the player 1302 to reproduce.
When the player 1301 is instructed to reproduce, the controller 204 reads out the encryption key 404 in the copy management information 401 of the recorded optical disk 1301 via the copy management information access unit 208 (711). Next, the permission ID authentication unit 1005 controls the copy management information access unit 208 to read the permission ID 406 from the recorded optical disk 1301 (1211). If the permission ID 406 can be read out, the device communicates with the ID device 1102 via the unique ID acquisition unit 1003 to acquire a unique ID, and performs ID authentication by comparing the permission ID 406 with the unique ID (1212). If the ID authentication is successful, the controller 204 of the player 1302 controls the content access unit 205 to read the content from the content recording area 102 (1514), and the decryption unit 209 decrypts the content using the encryption key 404 (1311). It is output from the analog I / F 206 as an analog audio signal.
If the permission ID 406 is not set in the recorded optical disc 1301, it is determined that anyone can reproduce the recorded optical disc 1301, and reproduction is performed without performing authentication (1212) using the permission ID. In this case, the procedure is the same as that shown in FIG. 7 of the first embodiment. If the ID device 1102 having the unique ID that matches the read permission ID 406 cannot be detected, the controller 204 determines that a person other than the owner of the recorded optical disk 1301 is trying to perform reproduction, and performs reproduction. Abort.
The user can reproduce the recorded optical disk 1301 without distinction whether it is a read-only optical disk sold by a record sales company or an optical disk duplicated by the procedure shown in FIG. 5 or FIG.
[0038]
By the above-described apparatus configuration and procedure, the copy management information 401 such as the encryption key 404 is recorded in a recording area having a physical access method different from that of the content recording area 102, thereby making it difficult to access the copy management information 401. It is possible to prevent illegal copying of the content recorded in the content recording area 102. Further, by encrypting the content recorded in the content recording area 102 of the optical disc, the effect of preventing illegal copying of the content can be further improved.
Also, the number of permitted duplications is recorded on the optical disc as the number of permitted duplications 403, and duplication is permitted within the range indicated by the permitted number of duplications 403. Enables creation of
Further, the unique ID is written as the permission ID 406 on the recorded optical discs 502, 1201, and 1301. At the time of reproduction, the players 1202 and 1302 authenticate the permission ID 406 recorded on the recorded optical disc and the unique ID held by the ID device 1102. As a result, reproduction by anyone other than the authorized user is restricted, so that a copy limited to private use can be created, and reproduction from that copy can be performed.
[0039]
Since illegal copying is prevented by encrypting and recording the content, the method of accessing the content recording area 102 uses a conventional optical disk such as a CD or DVD, thereby reducing the use of the optical disk drive according to the present embodiment. The development / manufacturing cost can be reduced and the price increase can be suppressed, and the optical disk drive according to the present embodiment can access a conventional optical disk such as a CD or a DVD, so that the convenience of the user is not impaired. .
In the present embodiment, an example is shown in which two optical disk drives, a player and a recorder, are used for copying. However, one optical disk drive and a personal computer are used, and the content read out by the optical disk drive is temporarily used by the personal computer. After storing the data on a hard disk or the like, the data may be recorded on the recordable optical disk inserted from the hard disk into the optical disk drive. Even in this case, since the content is encrypted, it cannot be reproduced as it is, and illegal copying can be prevented.
If the content of the recorded optical disc 1201 has no restriction on digital duplication, the recorder 504 records the content input from the player 1202 and the duplication management information 401 as they are on the recordable optical disc 1203. The recordable optical disk 1203 duplicated in this manner is an optical disk that can be re-digitally duplicated, like the recorded optical disk 1201.
Note that the recordable optical disc 1203 includes a writable disc, a freely erasable / writable disc, and the like. Further, the recorded optical disk may be not only a read-only optical disk in which contents such as a music title and a movie title are recorded by a press at the time of production but also a readable and writable optical disk.
As the encryption technique used in the decryption unit 209, an existing encryption technique such as AES (Advanced Encryption Standard) can be used.
[0040]
Note that the ID device 901 has been described as a single-function device that only holds a unique ID, but the purpose is to perform user authentication. Are preferred. Specifically, it is a mobile phone, a watch, a wallet, a key ring, and the like. The communication between the ID device and the optical disk drive may be not only wired communication having physical contacts but also wireless communication. If the form of the ID device is a mobile phone or a wristwatch, wireless communication is preferable. Further, since the user is assumed to be near the optical disk drive, it is preferable to use short-range wireless communication such as Bluetooth or IrDA in order to eliminate the ID device of another user who is far away.
When a plurality of ID devices are detected in wireless communication between the optical disk drive 1101 and the ID device 1102 at the time of recording the permission ID, a procedure for selecting a correct ID device by the user I / F of the optical disk drive 1101 is provided. Is preferred. When a plurality of ID devices are detected in the wireless communication between the optical disk drives as the players 1202 and 1302 and the ID device 1102, if any of the ID devices matches the permission ID, the authentication may be determined to be successful.
Note that, in this embodiment, the record sales company also provides the rental business to the rental business based on the number of purchase copies reported from the rental business by the same procedure as that described in the first embodiment. Can be charged. It is also possible for the user to purchase a new copy permitted number of times online from a record sales company.
[0041]
【The invention's effect】
As described above, according to the first aspect, there is provided an optical disc storing content and copy management information for performing content copy management, wherein the copy management information uses an access method different from the content. This makes it difficult to access the copy management information and prevents unauthorized copying of the content. According to the fourth aspect, in order to access the optical disk storing the content and the copy management information for performing the copy management of the content, the content access unit for accessing the content and the copy management information are accessed. In the optical disc device having the copy management information access means, the copy management information access means uses an access method different from the content access means, thereby making it difficult to access the copy management information and preventing unauthorized copying of the content. You can do it.
Further, according to the second aspect, in addition to the effect of the first aspect, the content is encrypted and recorded. According to the fifth aspect, in addition to the effect of the fourth aspect, The content is encrypted and recorded, and includes a decryption unit for decrypting the content read by the content access unit. Therefore, even if only the content output by the content access unit is copied, the content is reproduced. Therefore, the effect of preventing illegal copying of the content can be further improved.
According to the third and sixth aspects of the invention, in addition to the effects of the first and fourth aspects, the copy management information access means accesses the copy management information by wireless communication. Can be easily accessed and the convenience of the user can be improved.
[0042]
According to the seventh aspect, in addition to the effect of the fourth aspect, the copy management information includes the number of times the content can be copied, and the copy management information access means reads out the number of times the content can be copied, By updating and recording, in combination with the well-known online charging and authentication technology, the user only needs to prepare an Internet connection environment and purchase a new right to make a legal copy from a record sales company. And the convenience for the user is improved.
According to the eighth invention, in addition to the effect of the fourth invention, the copy management information includes a permission ID for specifying the owner of the content, and specifies the owner of the content. ID acquisition means for acquiring a unique ID and a permission ID recording means for generating a permission ID from the unique ID and recording the permission ID in the copy management information, so that the user is limited to private use. A copy can be created, and convenience is improved.
According to the ninth invention, in addition to the effect of the fourth invention, the copy management information includes a permission ID for specifying the owner of the content, and specifies the user of the content. ID obtaining means for obtaining a unique ID for obtaining a unique ID from the duplication management information accessing means, and performing authentication using the permission ID and the unique ID obtained from the unique ID obtaining means. A permission ID authentication unit that controls access to the content by the access unit is provided, so that the user can read from the copy limited to private use, thereby improving the convenience and preventing unauthorized copying of the content. The effect of doing is also obtained.
[0043]
According to the tenth aspect, there is provided a copy management apparatus for accessing an optical disc storing content and copy management information including a copy permitted number for performing copy management of the content, the copy management apparatus including: Input means for inputting as the number of purchase copies, purchase number counting means for counting the number of purchase copies, output means for outputting the total number of purchase copies, and copy management information as the number of times the purchase number of copies can be copied to the copy management information. Since the recording management information access means for recording is provided, it is possible to accurately grasp the update of the permitted number of times of copying, and it is possible to obtain the effect of accurately collecting the copyright fee of the content.
According to the eleventh aspect, in addition to the effect of the tenth aspect, the copy management information access unit accesses the copy management information by wireless communication, so that access to the copy management information is facilitated. An effect that user convenience is improved can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an optical disc according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of an optical disk drive according to the first embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of a copy management device according to the first embodiment of the present invention.
FIG. 4 is a diagram showing a configuration of copy management information according to the first embodiment of the present invention.
FIG. 5 is a diagram showing a procedure of copying an optical disc according to the first embodiment of the present invention.
FIG. 6 is a diagram showing a procedure for collecting a copyright fee according to the first embodiment of the present invention.
FIG. 7 is a diagram showing a reproduction procedure of the optical disc according to the first embodiment of the present invention.
FIG. 8 is a diagram showing a procedure for purchasing a new permitted number of copies according to the first embodiment of the present invention.
FIG. 9 is a diagram showing a configuration of an ID device according to a second embodiment of the present invention.
FIG. 10 is a diagram showing a configuration of an optical disk drive according to a second embodiment of the present invention.
FIG. 11 is a diagram showing a recording procedure of a permission ID according to the second embodiment of the present invention.
FIG. 12 is a diagram showing a procedure for creating a private copy of an optical disc according to the second embodiment of the present invention.
FIG. 13 is a diagram showing a reproduction procedure of the optical disc according to the second embodiment of the present invention.
FIG. 14 is a diagram showing a configuration of a conventional optical disk drive.
FIG. 15 is a diagram showing a conventional optical disk duplication procedure.
[Explanation of symbols]
201 Optical Disk Drive
202 Existing CD-RW component
203 Duplication control unit
204 controller
205 Content Access Department
206 Analog I / F
207 Digital I / F
208 Copy management information access unit
209 Decoding unit

Claims (15)

An optical disc storing content and copy management information for performing copy management of the content,
An optical disc, wherein the copy management information uses an access method different from the content. 2. The optical disc according to claim 1, wherein the content is recorded after being encrypted. 2. The optical disk according to claim 1, wherein the copy management information is accessed by wireless communication. In order to access the optical disk storing the content and the copy management information for performing the copy management of the content,
An optical disc device comprising: content access means for accessing the content; and copy management information access means for accessing the copy management information,
An optical disc apparatus, wherein the copy management information access means uses an access method different from the content access means. The content is encrypted and recorded,
5. The optical disk device according to claim 4, further comprising a decryption unit for decrypting the content read by the content access unit. 5. The optical disk device according to claim 4, wherein the copy management information access unit accesses the copy management information by wireless communication. The copy management information includes the number of times the content can be copied,
5. The optical disk apparatus according to claim 4, wherein said copy management information access means reads out, updates, and records the number of times the copy is permitted. The copy management information includes a permission ID for specifying an owner of the content,
A unique ID acquisition unit for acquiring a unique ID for identifying an owner of the content; and a permission ID recording unit for generating a permission ID from the unique ID and recording the permission ID in the copy management information. The optical disk device according to claim 4, wherein: The copy management information includes a permission ID for specifying an owner of the content,
Unique ID acquisition means for acquiring a unique ID for identifying a user of the content;
A permission ID is obtained from the copy management information access means, authentication is performed using the permission ID and the unique ID obtained from the unique ID acquisition means, and access to the content by the content access means is controlled depending on whether authentication is successful or not. The optical disk device according to claim 4, further comprising a permission ID authentication unit. A copy management device that accesses an optical disk that stores content and copy management information including a permitted number of times of duplication for performing content copy management,
Input means for inputting the number of possible copies desired by the user as the number of purchase copies, and a purchase copy number counting means for counting the number of purchase copies;
Output means for outputting the total number of purchased copies,
A copy management information access unit that records the number of purchased copies as the number of possible copies in the copy management information. The copy management apparatus according to claim 10, wherein the copy management information access unit accesses the copy management information by wireless communication. In order to access the optical disk storing the content and the copy management information for performing the copy management of the content,
Content access means for accessing the content, and a program for functioning as copy management information access means for accessing the copy management information,
The copy management information access means uses an access method different from the content access means. In order to access the optical disc storing the content and the copy management information including the number of times the content can be copied for performing the copy management of the content,
Input means for inputting the number of possible copies desired by the user as the number of copies to be purchased;
Purchase copy number counting means for counting the number of purchase copies,
Output means for outputting the total number of purchased copies,
A program for functioning as copy management information access means for recording the number of purchased copies as the number of possible copies in the copy management information. A computer-readable recording medium recording a program related to a method of accessing an optical disc storing content and copy management information for performing copy management of the content,
A content access step of accessing the content;
A recording medium recording a program for causing a computer to execute a copy management information access step of accessing the copy management information using an access method different from the content access step. A computer-readable recording medium recording a program related to a method for accessing an optical disk storing content and copy management information including a copy permitted number of times for performing copy management of the content,
An input step for inputting a user's desired number of possible copies as the number of purchased copies;
A purchase copy number counting step of counting the purchase copy number;
An output step of outputting the total number of purchased copies,
A recording medium characterized by recording a program for causing a computer to execute a copy management information access step of recording in the copy management information the number of purchase copies as a possible number of copies.

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