JPH0823313A - Data transmitter and data receiver - Google Patents

Abstract

PURPOSE:To prevent illegal reception on a receiver side by strengthening the security of scrambling. CONSTITUTION:A service operation company 3 sends a descramble program descrambling scrambled data together with the data to a satellite 4, and the signal of the data and the program is received by a data receiver 6, where the scrambled data are descrambled according to the descramble program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmitting apparatus for scrambling and transmitting data of a publication (for example, newspaper, book, magazine, etc.) and a data receiving apparatus for receiving the data.

[0002]

2. Description of the Related Art For example, in pay television broadcasting (or music broadcasting) by a broadcasting satellite, a program is scrambled and distributed in order to prevent interception of the program by a non-contractor. Those who wish to view the program can make a reception contract with the program provider,
Scramble key (decryption key) to unscramble
Is received, and the receiving side uses the scramble key to unscramble the program, that is, descrambles, so that the authorized subscriber can view the program.

Further, recently, as a data broadcasting system for electronically distributing data of newspapers (newspaper data), for example, newspaper data is inserted into a satellite data channel and transmitted via the satellite. Is being considered. In this case, a data receiving device at a home (contractor side) that has contracted to distribute newspaper data receives a signal from a satellite and takes out the newspaper data inserted in the data channel. Then, this newspaper data is recorded on a recording medium such as a magnetic disk or a magneto-optical disk, and is read from there when desired by the contractor. The read data is displayed on, for example, a display or printed out so that the contractor can view the newspaper.

Even in such a data broadcasting system, newspaper data is scrambled in order to prevent unauthorized reception, and the subscriber side is descrambled using the received scramble key. There is.

[0005]

By the way, in the above system, the contractor descrambles according to a predetermined algorithm. Therefore, when the algorithm is known to the non-contractor, even if the scramble key is changed, it becomes possible to easily perform descrambling, and thus there is a problem that it is illegally received.

The present invention has been made in view of such a situation, and strengthens security management of broadcast contents,
This makes it possible to prevent unauthorized reception.

[0007]

A data transmitting apparatus of the present invention is a data transmitting apparatus for transmitting data, and includes scrambling means for scrambling the data (for example, a data scramble processing circuit 14 shown in FIG. 2). It is characterized by transmitting an object including at least a descramble program which is a program for performing a descrambling process by the scramble means.

In this data transmission device, the data can be data of a publication. In addition, data and objects can be transmitted via a satellite line or the CATV network. Furthermore, data and objects can be sent via different transmission paths.
In addition, the descramble program can be an intermediate code that does not depend on hardware.

A data receiving apparatus according to the present invention is a data receiving apparatus for receiving data transmitted from the data transmitting apparatus according to any one of claims 1 to 5, and is applied to the data according to a descramble program. A descrambling means (for example, the data descrambling processing circuit 87 shown in FIG. 5) for descrambling the scramble is provided.

According to another aspect of the present invention, there is provided a data receiving device.
A data receiving device for receiving the data transmitted from the data transmitting device described in 1., and a translating means for translating the intermediate code of the descramble program into a predetermined machine code (for example, the processing circuit 32 shown in FIG. 5). And descrambling means (for example, the data descramble processing circuit 87 shown in FIG. 5) for descramble the scrambled data according to a predetermined machine code.

When the data receiving apparatus further includes recording means (for example, the data recording medium control circuit 34 shown in FIG. 5) for recording the intermediate code of the descrambling program on the recording medium, the translating means includes the recording medium. The intermediate code of the descramble program recorded in can be translated.

[0012]

In the data transmitting apparatus of the present invention, data is scrambled and transmitted, and at the same time, an object including at least a descramble program which is a program for performing a descrambling process is transmitted. Therefore, for example, the scramble algorithm is changed regularly or irregularly, and the descramble program corresponding to the changed algorithm is transmitted, thereby strengthening security management and preventing unauthorized reception on the receiving side. be able to.

In the data receiving device of the present invention, the data transmitted from the data transmitting device according to any one of claims 1 to 5 is received, and the scrambled data is descrambled according to the descramble program. It Therefore, even if the scrambling algorithm is changed on the transmitting side, it is possible to perform descrambling.

In another data receiving apparatus of the present invention,
The data transmitted from the data transmission device according to the fifth aspect is received, and the intermediate code of the descramble program is translated into a predetermined machine code. Then, the scramble applied to the data is descrambled according to the machine code. Therefore, the descrambling processing system can be a so-called virtual machine,
As a result, the device can be configured without using dedicated hardware.

[0015]

1 shows an example of the configuration of a data broadcasting system to which the present invention is applied. According to this data broadcasting system, for example, multimedia data centered around data of newspapers, books, magazines and other publications is broadcast, and the receiving side receives this, records it on a recording medium, and when desired. It is designed so that the data can be read and viewed from there.

A newspaper company as an information provider has a large-scale computer 1. A paper space database is stored in the large-scale computer 1. This paper surface database includes articles and photographs for printing on newspapers, drawing information, and layout information. The data in this database are all digitized and are transmitted to the editing device 2 and edited there as required.

That is, the data in the database is edited, for example, for each sheet of paper in a format that is easy to search on the receiving (recipient) side. For example, this editing creates a screen for search in which the layout is unchanged and only the headline is visible and the paper surface is reduced as it is. Further, the search screen (heading) is associated with the article data describing the details so that the article corresponding to the heading can be displayed from this heading.

Further, in the editing device 2, for example, additional text data, image data, voice data (for example, news program images and voices corresponding to newspaper articles, etc.) which are not stored in the large-scale computer 1 are stored. ) Etc. are input as needed. In the editing device 2, these pieces of information (text data, image data, voice data) (also digitized like the data in the above-mentioned database) are edited in a format that can be easily searched by the receiving side ( In this case, as described above, in addition to editing the layout when the information (text data, image data, voice data) is displayed on the screen, the relation between the information and the newspaper article corresponding to the information is also performed. ).

The image data and audio data are compressed as needed. Further, it is possible to appropriately insert advertisement data provided by the advertisement providing company into the newspaper data. In this case, the advertisement data is properly displayed on the receiving side during the search of newspaper data.

As described above, multimedia newspaper data whose core is newspaper data, which is data that is edited in a form that can be easily searched by the receiving side and that is a combination of text data, image data, and voice data, is for example terrestrial. The data is transmitted to the service management company 3 via the data line.

Further, the service operating company 3 provides data such as magazines and books provided by publishers, which are other information providers, and programs provided by television stations (composed of video signals and audio signals). ) Etc. are also supplied. Note that the data of a magazine or a book provided by a publisher is, for example, similar to the data provided by a newspaper company described above, it is multimedia data that combines text data, image data, and audio data (hereinafter, appropriately referred to as a multimedia magazine). /
Book data)).

The data transmitted to the service operating company 3 is transmitted from there to a satellite (broadcast satellite (BS) or communication satellite (CS)) 4, and from the satellite 4 to a receiving side (for example, a receiver in each home). (Subscriber) etc.). That is, the information (data) provided by the information provider
Is transmitted to the receiver side via the satellite line.

The service operating company 3 has, for example, a transmitting device as shown in FIG. Multimedia data from newspaper publishers and multimedia magazines from publishers /
The book data is multiplexed by a multiplexing circuit (not shown) and supplied as multimedia data to the encoder 25 which constitutes the transmitting device. In the service management company 3, for example, multimedia magazine / book data is edited, if necessary, so that it can be easily searched by the receiving side, and then multiplexed with the multimedia newspaper data.

In addition to the multiplexed multimedia magazine / book data and multimedia newspaper data (hereinafter, both are appropriately referred to as multimedia data), the encoder 25 also has, for example, a data identifier (which identifies the multimedia data). Information), common information including work keys, etc., and a unique receiving device ID attached to each data receiving device on the receiving side and contract contents corresponding to the receiving device ID (in this case, the receiving device ID). The data including the user management information and the like is input.

Of these, the multimedia data is supplied to the data scramble processing circuit 14. Further, the data scramble processing circuit 14 includes, for example, a CPU and an R.
A program (scramble program) for performing a scramble process, which is generated by the security object generation processing circuit 13 including a computer including an OM and a RAM
And control data (for example, a scramble key) necessary for the scrambling process are supplied. The data scramble processing circuit 14 executes the scramble program to scramble the multimedia data using the control data as needed, and outputs the scrambled multimedia data to the independent data channel multiplexing circuit 12.

Security object generation processing circuit 1
The scramble program generated by No. 3 is configured to be changed, for example, on a regular basis, but an operation unit (not shown) is operated as necessary (for example, when there is a fear of unauthorized reception on the receiving side). It can be changed by doing.

Therefore, in this case, even if the descramble algorithm is known to the non-contractor, the scramble algorithm is changed as described above, so that the security management is strengthened and the unauthorized reception on the receiving side is prevented. Can be prevented.

Security object generation processing circuit 1
In addition to generating the scramble program as described above, 3 further includes a program (descramble program and control data necessary for the descramble processing (for example, the scramble key described above)) that descrambles the scramble by the scramble program. Then, the descrambling program (source program) is converted into intermediate code that does not depend on hardware, that is, an intermediate code that is interpreted and executed by a so-called virtual machine. Hereinafter, the security object will be appropriately output) to the related information encryption circuit 11. Note that the security object includes control data when necessary.

Therefore, in this case, since the descramble program is transmitted by the intermediate code, the amount of transmission data can be reduced as compared with the case where it is transmitted as it is as the source program.

In addition to the security object, the related information encryption circuit 11 is supplied with common information and individual information. The encryption circuit 11 encrypts the common information and the individual information by using the work key included in the common information and transmitted last time. Therefore, on the receiving side,
The encrypted common information and individual information are decrypted using the work key already received. The work key is changed on a regular or irregular basis.

The data encrypted as described above is
As related information, the independent data channel multiplexing circuit 12
Is supplied to. Independent data channel multiplexing circuit 12
Outputs the multiplexed scrambled multimedia data supplied from the data scramble processing circuit 14 and the related information supplied from the encryption circuit 11 to the digital channel signal multiplexing circuit 15.

The above configuration constitutes an encoder 25 for generating data in an independent data channel, which will be described later with reference to FIG.

The digital channel signal multiplexing circuit 15 also receives an audio signal transmitted as a digital channel signal (at least a part of which is an audio signal of a program provided by the above-mentioned television station). . The digital channel signal multiplexing circuit 15 multiplexes the input audio signal (digital audio signal) and the data supplied from the encoder 25, and four-phase DPSK
It is supplied to the modulator 16.

The 4-phase DPSK modulator 16 4-phase DPSK-modulates the input data and outputs it to the video signal / digital channel signal multiplexing circuit 17. This video signal /
The digital channel signal multiplexing circuit 17 also includes
A video signal of a program provided by a television station is input.
The audio signal input to the digital channel signal multiplexing circuit 15 is a digital signal, whereas the video signal input to the video signal / digital channel signal multiplexing circuit 17 is an analog signal.

It should be noted that, in the future, this video signal will be a digital signal instead of an analog signal, and the information provider (a newspaper company, a publishing company, and a television station in FIG. 1).
It is possible to handle all the data transmitted from the device as multimedia data.

The video signal is scrambled, and then the video signal / digital channel signal multiplexing circuit 1
It is possible to input to 7. in this case,
The scramble key used for scrambling the video signal is input to, for example, the related information encryption circuit 11, encrypted therein and included in the related information.

The video signal / digital channel signal multiplexing circuit 17 frequency-multiplexes the input video signal and the signal supplied from the 4-phase DPSK modulator 16, and FM
Output to the modulator 18. The FM modulator 18 FM-modulates a predetermined carrier with the input signal and outputs it to the up converter 19. The up-converter 19 frequency-converts the input FM signal into a signal in a frequency band on the order of gigahertz (for example, Ku band or Ka band). The FM signal output from the up converter 19 is
After the power is amplified by the power amplifier 20, the power is supplied to the transmitting antenna 21 and is then transmitted to the satellite 4 (FIG. 1).

Here, FIG. 3 shows the format (A mode format) of digital channel data which has been 4-phase DPSK modulated. As shown in the figure, one frame of data is composed of a total of 2048 bits of horizontal 64 bits and vertical 32 bits. A frame synchronization signal, a control signal, and a range bit signal are arranged (recorded) in the first range of 2 bits × 32 bits. 1 ms data for 1 frame
Transmission rate is 2.048Mb
ps.

The frame synchronization signal is a signal for synchronizing each frame. The control signal indicates whether the transmission mode is the A mode or the B mode, and the television audio signal (audio signal of the program provided from the television station) (located in the audio 1 and 2 in FIG. 3). It indicates whether it is a stereo signal, a monaural 1-channel signal, a monaural 2-channel signal, or the like.

The voices 1 to 4 to be described below are the most significant 1 of the significant digits of the voice data quantized with 14 bits.
0 bit is selected and arranged. The range bit signal is adapted to represent the range of the selected audio data.

As shown in FIG. 3, the audio data of audio 1 to audio 4 are respectively provided in the next 10 × 32 bit range of the first 2 × 32 bit range and the subsequent 3 × 10 × 32 range. Are recorded (arranged) (however, data other than voice may be arranged in the voices 3 and 4). Next to the voice 4 data, 15x
The data of the independent data channel is arranged in the range of 32 bits, and the error correction code in the horizontal direction is arranged in the last range of 7 × 32 bits.

Here, the data of the independent data channel shown in FIG. 3 is transmitted in a predetermined packet unit. For example, one packet is composed of 288 bits, the first 16 bits are used as a header, the actual data is arranged in the following 190 bits, and the error correction code of the packet is arranged in the last 82 bits. The header includes at least a service identification code and its error correction code (check bit). The service identification code identifies, for example, whether the data arranged in the packet is related information or multimedia data. It includes a code for doing.

To the independent data channel, the related information output by the related information encryption circuit 11 shown in FIG. 2 and the multimedia data output by the data scramble processing circuit 14 are allocated in packet units, and the packets of the packets are allocated. A service identification code is set corresponding to the allocated data (whether the data is related information or multimedia data).

The above data is transmitted from the service operating company 3 in FIG. 1 to the satellite 4, and further transmitted from the satellite 4 to, for example, the receiver (contractor) in each home. In each home (reception side), the signal transmitted from the satellite 4 is received by the outdoor device (parabolic antenna) 5 and converted into a predetermined intermediate frequency signal (IF signal). This IF signal is input to the data receiving device 6.
The IF signal input to the data receiving device 6 is demodulated therein and recorded on a recording medium (other than, for example, a magnetic disk (hard disk)) such as a magneto-optical disk (hereinafter referred to as MO) 8 or the like.

After recording the data in the MO 8, the user (receiver) can retrieve the necessary data from the user (receiver) and output it to the monitor 7 for display (or a speaker not shown) when desired. Can be output from). Further, the MO 8 can be attached to, for example, a portable terminal, a desktop terminal, or the like, and desired data can be searched and displayed from there.

Next, FIG. 4 shows a configuration example of the data receiving device 6. Each block constituting the data receiving device 6 is adapted to exchange data (including control commands and the like) via a bus.
Each block is controlled by a processing circuit 32 including U, ROM, and RAM. The data receiving device 6 can be controlled by operating the remote controller 9. That is, when the remote controller 9 is operated, a signal corresponding to the operation is sent to the processing circuit 32 via the input device 33.
In the processing circuit 32, the processing corresponding to the signal from the remote controller 9 is performed.

In this data receiving device 6, the IF signal from the outdoor device 5 is supplied to the data receiving circuit 31. In the data receiving circuit 31, the input IF signal is demodulated. Further, the data receiving circuit 31 includes the processing circuit 3
Under the control of 2, the multimedia data contracted by the receiver (for example, newspaper data of a predetermined newspaper company and accompanying text data, image data, and audio data, data of a predetermined magazine or book, and accompanying data thereof) Text data, image data, voice data, etc.) are decoded and output to the data recording medium control circuit 34.
The data recording medium control circuit 34 records the data from the data receiving circuit 31 in MO8.

After that, when the remote controller 9 is operated and an operation signal corresponding to the operation is received by the input device 33,
The input device 33 transfers the operation signal to the processing circuit 32. When the processing circuit 32 receives the predetermined operation signal, the processing circuit 32 causes the data recording medium control circuit 34 to reproduce the data recorded in the MO 8 and supplies it to the display interface 35. The display interface 35 converts the input data into a video signal and outputs the video signal to the monitor 7 for display (when the data reproduced from the MO 8 is audio data, the data is output from a speaker not shown). Be done). This allows the contractor to
You can view subscribed newspapers, magazines, books, and accompanying text, images, and audio.

FIG. 5 shows a more detailed configuration example of the data receiving circuit 31. The IF signal input from the outdoor device 5 is input to the FM demodulator 71. FM demodulator 71
Demodulates the IF signal into a baseband signal and outputs it to the video signal / digital channel signal separation circuit 72.
The video signal / digital channel signal separation circuit 72 is
The video signal and the digital channel signal are separated from the input signal. The video signal is supplied to a decoder (not shown). The decoder descrambles the video signal using the scramble key supplied from the processing circuit 32 as described later, when the contract for receiving the supplied video signal is concluded. The descrambled video signal is displayed on the display interface 35 (FIG. 4).
Is output to and displayed on the monitor 7 via.

On the other hand, the digital channel signal separated by the video signal / digital channel signal separation circuit 72 is input to the 4-phase DPSK demodulator 73 and demodulated. The signal output from the 4-phase DPSK demodulator 73 is input to the digital channel signal separation circuit 74, where it is converted into a voice signal (a signal arranged in the voice 1 to 4 shown in FIG. 3) and a signal of an independent data channel. To be separated. The audio signal, if it corresponds to the above-mentioned video signal, is supplied to the speaker and is output as audio therefrom.

Further, the digital channel signal separation circuit 74 outputs the separated independent data channel signal to the multimedia data / related information separation circuit 81. The multimedia data / related information separation circuit 81 separates the multimedia data and the related information from the input signal, outputs the multimedia data to the data descramble circuit 87, and outputs the related information to the related information decoding circuit 82. Output to. This is done by referring to the service identification code described above.

The related information decoding circuit 82 uses the work key stored in the work register 83 to decode the input related information. Then, the data identifier included in the common information in the decryption result is output to the download permission / inhibition decision circuit 84, and is used for other than that (security object, individual information, common information excluding data identifier, and scramble of video signal). The generated scramble key) is output to the processing circuit 32.

When the information supplied from the related information decoding circuit 82 includes the scramble key used for scrambling the video signal from the television station, the processing circuit 32 outputs it to the decoder. As a result, the decoder uses the scramble key, as described above, in the video signal / digital channel signal separation circuit 72.
The video signal output from is descrambled.

Further, the processing circuit 32 supplies the work key contained in the common information from the related information decoding circuit 82 to the work key register 83 to store it therein. The related information decoding circuit 82 uses the work key thus stored in the work register 83 to decode the related information to be supplied next. Therefore, the service management company 3 shown in FIG.
The security of the related information can be strengthened by changing the work key used in the transmission device of 1) regularly or irregularly.

Further, the processing circuit 32 temporarily records the security object (intermediate code security object) in the decryption result from the related information decryption circuit 82 in the MO 8 via the data recording medium control circuit 34. Then, the processing circuit 32 appropriately reads out the security object recorded in MO8, that is, the descramble program of the intermediate code, and converts (translates) the machine code executable by the data descramble processing circuit 87. The descrambling program converted into an executable file after conversion is again supplied to the MO 8 and recorded therein.

The conversion of the descramble program into the machine code is performed by, for example, the CP included in the processing circuit 32.
It is performed by using the free time of U. In the above case,
Although the descrambling program of the intermediate code is once recorded in the MO8 and then converted into the machine code, other than this, for example, in the processing circuit 32, the security object of the intermediate code is not recorded in the MO8,
It is also possible to convert it into machine code. However, in this case, it is conceivable that the processing circuit 32 needs to perform the conversion processing into the machine code when the processing with a large load is performed therein.
A high-performance CPU needs to be used as the CPU incorporated in the processing circuit 32.

After that, the processing circuit 32 compares the user management information included in the individual information supplied from the related information decoding circuit 82 with the stored value of the data receiving device ID register 86. The data receiving device ID register 86 stores the data receiving device ID of the data receiving device 6, and the processing circuit 32 stores the receiving device ID constituting the user management information and the data receiving device ID register 86. The data receiving device ID is compared, and when they match, the contract content corresponding to the data receiving device ID is extracted from the user management information, output to the contract content register 85, and stored (in the contract content register 85). Changes to the contract contents that have already been stored are made in the same way).

When the contract content is stored in the contract content register 85, the download availability determination circuit 84 compares the contract content with the data identifier supplied from the related information decoding circuit 82. As described above, the contract content includes the data identifier of the contracted multimedia data, and the download permission / inhibition determination circuit 84 matches these two identifiers, and further, the matched identifier is
When stored in the download request setting circuit 88,
A descramble instruction signal for instructing descramble of data is output to the processing circuit 32.

Here, in the download request setting circuit 88, for example, by operating the remote controller 9, the data identifier of the multimedia data that the receiver (contractor) has contracted for which is desired to be registered is registered in advance. ing. Therefore, the descramble instruction signal is output when the contracted multimedia data which is desired to be downloaded is received.

When the processing circuit 32 receives the descramble instruction signal from the download permission / inhibition decision circuit 84, the MO
The descramble program of the machine code recorded in 8 is read and transferred to the data descramble processing circuit 87. The data descramble processing circuit 87 has an arithmetic function, and descrambles the scrambled multimedia data input according to the descramble program from the processing circuit 32, that is, by executing the descramble program. . The descrambled multimedia data is transmitted to the MO via the data recording medium control circuit 34 as described above.
8 to be recorded.

When the security object includes control data, the processing circuit 32 transfers the control data together with the machine code descramble program to the data descramble processing circuit 87.
Therefore, in this case, the data descramble processing circuit 87
Then, the descrambling process is performed using the control data.

As described above, the data receiving device 6 receives the descramble program and performs the descramble according to the program, so that the descramble is performed even if the scrambling algorithm in the service operating company 3 is changed. be able to.

Further, the descramble program is described by the intermediate code which the virtual machine interprets and executes as described above, and therefore the data descramble processing circuit 8 is provided.
7 can be realized by software on various microcomputers, and as a result, the device can be configured without using dedicated hardware.

The case where the present invention is applied to the data broadcasting system for transmitting the data of publications such as newspapers, magazines and books has been described above, but the present invention is applied to the data broadcasting system for transmitting other data. It is possible.

In this embodiment, the data is transmitted via the satellite line. However, other transmission lines for transmitting the data include wireless lines other than the satellite line, PSTN and ISDN. , CATV cables, dedicated lines, other data lines, etc. can be used.

Further, in the present embodiment, the security object is transmitted (transmitted) through the same transmission path (satellite line in the present embodiment) as the multimedia data. However, the security object and the multimedia data are transmitted. Can be transmitted (transmitted) through different transmission paths.

That is, for example, as shown in FIG. 1, multimedia data is transmitted by a large-capacity satellite line, and security objects are transmitted (transmitted) by a telephone line (public telephone network) such as ISDN or PSTN. You can However, in this case, for example, as shown in FIG. 4, it is necessary to provide the data receiving device 6 with a modem 36 or the like serving as an interface of a telephone line.

Further, in the present embodiment, the work key for decrypting the related information is transmitted, but in addition to this, the object of the program for decrypting the related information is transmitted, and thereby the related information is decrypted. It is possible.

Also, the scramble of the video signal provided by the television station does not transmit the scramble key, but the scramble key is transmitted.
It is possible to transmit the object of the program that performs the descrambling process and use it to solve.

Further, in the present embodiment, the intermediate code of the descramble program is transmitted.
In addition, it is also possible to transmit the source program or a machine code converted (translated) (compiled), for example.

[0071]

As described above, according to the data transmitting apparatus of the present invention, it is possible to strengthen security management and prevent unauthorized reception on the receiving side.

According to the data receiving apparatus of the present invention,
Even if the scrambling algorithm is changed on the sending side,
It becomes possible to perform descrambling.

Further, according to another data receiving apparatus of the present invention, the processing system for descrambling is a so-called virtual machine, which makes it possible to configure the apparatus without using dedicated hardware. Become.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a data broadcasting system to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration example of a transmission device included in the service operating company 3 of FIG.

FIG. 3 is a diagram illustrating a format of digital channel data.

4 is a block diagram showing a detailed configuration of a data receiving device 6 in FIG.

5 is a block diagram showing a detailed configuration of a data receiving circuit 31 of FIG.

[Explanation of symbols]

 1 Large Computer 2 Editing Device 3 Service Operating Company 4 Satellite 5 Outdoor Device 6 Data Receiving Device 7 Monitor 8 Magneto-Optical Disk (MO) 9 Remote Control 11 Related Information Encryption Circuit 12 Independent Data Channel Multiplexing Circuit 13 Security Object Generation Processing Circuit 14 Data scramble processing circuit 15 Digital channel signal multiplexing circuit 16 4-phase DPSK modulator 17 Video signal / digital channel signal multiplexing circuit 18 FM modulator 19 Up converter 20 Power amplifier 21 Transmitting antenna 25 Encoder 31 Data receiving circuit 32 Processing circuit 33 Input device 34 Data recording medium control circuit 35 Display interface 36 Modem 71 FM demodulator 72 Video signal / digital channel signal separation circuit 73 4-phase DPSK demodulator 4 digital channel signal separator 81 multimedia data / related information separator 82 related information decoding circuit 83 work key register 84 downloads determination circuit 85 contract register 86 the data receiving device ID register 87 data descrambling circuit

Claims (8)

[Claims] 1. A data transmitting apparatus for transmitting data, comprising an scramble means for scrambling the data, and an object including at least a descramble program which is a program for performing a process of descrambling the scramble by the scramble means. A data transmitting device for transmitting. 2. The data transmission device according to claim 1, wherein the data is data of a publication. 3. The data transmitting apparatus according to claim 1, wherein the data and the object are transmitted via a satellite line or a CATV network. 4. The data transmitting apparatus according to claim 1, wherein the data and the object are transmitted via different transmission paths. 5. The data transmitting apparatus according to claim 1, wherein the descrambling program is an intermediate code that does not depend on hardware. 6. A data receiving device for receiving data transmitted from the data transmitting device according to claim 1, wherein the scrambled data is descrambled according to the descrambling program. A data receiving apparatus comprising descrambling means for performing the descrambling. 7. A data receiving device for receiving the data transmitted from the data transmitting device according to claim 5, wherein the translating means translates the intermediate code of the descramble program into a predetermined machine code, A data receiving device, comprising: a descrambler for descrambled scrambled data according to a predetermined machine code. 8. The recording medium further comprises a recording unit for recording the intermediate code of the descramble program on a recording medium, and the translating unit translates the intermediate code of the descramble program recorded on the recording medium. The data receiving device according to claim 7.