JP2002165197A - Limited receiver of digital broadcasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a limited receiver of digital broadcasting having high confidentiality, that receiver has a double check function, based on copyright protecting function, while embodying an arrangement for allowing limited receiving, only to machines coming with an encryption part at an output stage, depending on programs in a limited receiver of digital broadcasting capable of viewing programs according to the contents of an agreement. SOLUTION: In the receiver, a certification control section 28 certifies the existences of an encryption section 3 for AV output, an encryption section 7 for transmission and an encryption section 11 for storage by each exchange of key information and the like, a desk rambler section 1, a decoding section 4 for receiving and a decoding section 12 for storage each performs processing of streams inputted from each section 1, 4, 12 while being restricted according to a certification result at the section 28; after that, a decoding section 2, a transmission section 6, storage control section 8 perform prescribed processes with encryption processing at the section 3, 7, 11, to output to a display device, to a loudspeaker, to a recording device and to a storage section for displaying or recording.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting limited receiving apparatus for receiving a scrambled compressed video / audio stream sent by digital broadcasting, descrambling, and reproducing video / audio. It is.

[0002]

2. Description of the Related Art Conventional digital broadcasting limited receiving apparatuses include, for example, Japanese Patent Application Laid-Open Nos.
The one described in JP-A-234647 is known.

[0003] A conventional general digital broadcasting limited reception apparatus will be described below with reference to FIG.

FIG. 11 is a diagram showing a system configuration of a conventional general digital broadcasting limited receiving apparatus, which includes a front end section 41, a descrambler section 42, and a decoder section 4.
3 is comprised.

[0005] First, the front end section 41 selects a signal input to the digital broadcasting limited reception apparatus according to frequency, and then digitally demodulates the modulated signal, further performs error correction, and performs scrambled transport. The stream is output to the descrambler unit 42 as a stream.

Next, in the descrambler section 42, the scrambled transport stream is scrambled program data, a scramble key encrypted as program information (ECM), and a work encrypted as individual information (EMM). If the program to be received is separated from the key and matches the contract, the work key is decrypted by means of an IC card or the like with the master key stored in the digital broadcasting limited reception apparatus, and the work key is decrypted. The decrypted scramble key is decrypted by the work key, and the program data is descrambled by the decrypted scramble key. As a result, the transport stream is output to the decoder unit 43 as a descrambled transport stream.

Finally, the decoder 43 selectively separates predetermined compressed video and audio data from the transport stream, decodes the video and audio, and
Uncompressed AV data is output to a display device and a speaker.

[0008]

In this digital broadcasting limited receiving apparatus, if only the contents of the contract are met,
Because conditional access can be performed without having a copyright protection function, there is a risk that the scramble of conditional access may be broken,
In addition to viewing the limited received program on the display device, the limited received program can be output as digital data and copied by an external device.

[0009] Therefore, when high-resolution program broadcasting becomes possible, a more confidential conditional access system that does not receive unauthorized viewing even if the scramble is broken is required.
In addition, along with the enhancement of the copyright protection function to restrict copying, some programs have a copyright protection function so that conditional access devices that do not include or disable the copyright protection function will not spread to the world. A mechanism that allows conditional access only to the device is required.

[0010]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention authenticates the existence of an encryption means having a copyright protection function provided in an output stage, and performs reception / reproduction processing according to the authentication result. This is a configuration that can be controlled.

[0011] Thus, a copyright protection function-equipped 2
A highly confidential digital broadcast limited reception device having a heavy check function can be provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital broadcasting limited reception apparatus according to the first invention of the present application authenticates an encryption means of a copyright protection function provided in an output stage, and restricts reception / reproduction processing according to the result. It is characterized by.

The operation of the first invention is as follows. If the authentication result of the encryption means is reflected in the reception / reproduction processing, and the existence of the encryption means is not recognized, for example, the reception / reproduction processing of the high-resolution video stream is authorized regardless of the contract contents. The status is different from the status described above, and the status of the AV data or video / audio stream that is not normal is forced. That is, a highly confidential digital broadcast limited receiving apparatus having a double check function with a copyright protection function can be realized.

[0014] The digital broadcast conditional access apparatus of the second invention of the present application inputs a scrambled compressed video / audio stream, performs descrambling processing in accordance with the contract contents, and converts the descrambled compressed video / audio stream. A descrambler for outputting, and a decoder for receiving a compressed video / audio stream from the descrambler, decoding the same, and outputting uncompressed AV data;
A which inputs uncompressed AV data from the decoder means, performs encryption processing, and outputs uncompressed encrypted AV data
The existence of the V output encryption means and the AV output encryption means is authenticated. If the AV output encryption means is present, the descrambler means is enabled, and the AV output encryption means is present. And authentication control means for restricting the descrambler means if not present.

The operation of the second invention is as follows. The authentication control means authenticates the existence of the AV output encryption means by exchanging key information and the like. When the AV output encryption means exists, the authentication control means does not limit the descrambler means, Allow descrambling. In this case, the descrambler inputs the scrambled compressed video / audio stream, performs descrambling according to the contract, and outputs the descrambled compressed video / audio stream to the decoder. The decoder means, after selectively separating predetermined compressed video / audio data from the descrambled compressed video / audio stream, decodes the video and audio, and outputs the uncompressed AV data to the AV output encryption means. Output. The AV output encryption means performs encryption processing on the uncompressed AV data, outputs the uncompressed encrypted AV data to a display device / speaker or a recording device having a decryption processing function, and performs viewing / listening. Or record.

However, in the authentication of the AV output encrypting means by the authentication control means, if the existence of the AV output encrypting means is not recognized, for example, regarding the high resolution video stream, regardless of the contract contents, The authentication control means imposes restrictions on the descrambler means such as not permitting descrambling processing. In this case, therefore, the descrambling process in the descrambler means is not performed normally, and the compressed video / audio stream that has not been descrambled is input from the descrambler means to the decoder means. Of course, the video and audio decoding process was not successful,
The abnormal AV data is output to the AV output encrypting means.

As described above, the authentication result of the AV output encryption unit by the authentication control unit is reflected in the control of the descrambler unit. For example, for a high-resolution program broadcast, the AV output encryption as a copyright protection function is performed. If the means is not mounted or the encryption means for AV output is invalidated, it is possible to construct a highly confidential conditional access system that does not perform unauthorized viewing or copying even if the scramble is broken. It becomes possible.

The digital broadcast conditional access apparatus of the third invention of the present application inputs a scrambled compressed video / audio stream, performs descrambling according to the contract contents, and converts the descrambled compressed video / audio stream. Descrambler means for outputting, compressed video / audio stream input from the descrambler means, format conversion for communication, transmission means for transmitting the compressed video / audio stream, compression after format conversion by the transmission means Input video and audio streams, encrypt them,
A transmitting encrypting means for outputting an encrypted compressed video / audio stream, and authenticating the existence of the transmitting encrypting means. If the transmitting encrypting means is present, the descrambler means is effectively used for transmitting. If there is no encryption means, an authentication control means for restricting the descrambler means is provided.

The operation of the third invention is as follows. The authentication control means authenticates the existence of the transmission encryption means by exchanging key information or the like. When the transmission encryption means exists, the authentication control means does not limit the descrambler means and performs normal descrambling. Allow processing. In this case, the descrambler means inputs the scrambled compressed video / audio stream, performs descrambling processing according to the contract contents, and outputs the descrambled compressed video / audio stream to the transmission means. The transmitting unit converts the descrambled compressed video / audio stream into a format for communication and outputs the format to the transmitting encrypting unit. The transmitting encrypting means receives the format-converted compressed video / audio stream from the transmitting means, performs an encryption process, and transmits the encrypted compressed video / audio stream to the outside.

However, in the authentication of the transmission encryption means by the authentication control means, if the existence of the transmission encryption means is not recognized, for example, for the high-resolution video stream, regardless of the contract contents, the authentication control means does not perform the authentication control. The means imposes restrictions on the descrambler means, such as not permitting descrambling processing. In this case, therefore, the descrambling process in the descrambler means is not performed normally,
A compressed video / audio stream that has not been descrambled is input to the transmission means from the descrambler means. If so, the transmission means does not properly perform the video / audio format conversion processing, and abnormal encryption is performed. The compressed video / audio stream is output to the transmission encryption means.

As described above, since the authentication result of the transmission encryption means by the authentication control means is reflected in the control of the descrambler means, for example, for a high-resolution program broadcast, the transmission encryption means as a copyright protection function is provided. In the case where no transmission is performed or the transmission encryption unit is invalidated, it is possible to construct a highly confidential limited reception system in which unauthorized transmission is not performed even if the scramble is broken.

The digital broadcast conditional access apparatus of the fourth invention of the present application inputs a scrambled compressed video / audio stream, performs descrambling according to the contract contents, and converts the descrambled compressed video / audio stream. A descrambler means for outputting, a compressed video / audio stream input from the descrambler means, an encryption process, and an encryption means for storage for outputting an encrypted compressed video / audio stream; and the encryption means for storage. Authenticate the existence of
If the storage encryption means is present, the descrambler means is enabled.If the storage encryption means is not present, the authentication control means for limiting the descrambler means, and the storage encryption means A storage control unit that receives an encrypted compressed video / audio stream and controls the storage of the encrypted compressed video / audio stream, and stores the encrypted compressed video / audio stream under the control of the storage control unit. Storage means.

The operation of the fourth invention is as follows. The authentication control unit authenticates the existence of the storage encrypting unit by exchanging key information or the like. When the storage encrypting unit is present, the descrambler unit is not subjected to normal descrambling without any restriction. Allow processing. In this case, the descrambler means inputs the scrambled compressed video / audio stream, performs descrambling according to the contract contents, and outputs the descrambled compressed video / audio stream to the storage encryption means. Output. The storage encryption means performs an encryption process on the descrambled compressed video / audio stream,
The encrypted compressed video / audio stream is output to the storage control means. The storage control means stores the encrypted compressed video / audio stream in the storage means. The encrypted compressed video / audio stream stored in the storage means is read out later, output to a display device / speaker having a decryption processing function, and viewed.

However, in the authentication of the storage encrypting means by the authentication control means, if the existence of the storage encrypting means is not recognized, for example, the authentication control of the high-resolution video stream is performed regardless of the contract contents. The means imposes restrictions on the descrambler means, such as not permitting descrambling processing. In this case, therefore, the descrambling process in the descrambler means is not performed normally,
A compressed video / audio stream that has not been descrambled from the descrambler is input to the storage encryption unit, and if so, the storage encryption unit cannot, of course, successfully perform video and audio encryption processing. Then, the abnormally encrypted compressed video / audio stream is output to the storage control means and stored in the storage means.

As described above, the authentication result of the storage encryption unit by the authentication control unit is reflected in the control of the descrambler unit. For example, for a high-resolution program broadcast, the storage encryption unit as a copyright protection function is used. If it is not mounted or if the storage encryption means is disabled, even if the scramble is broken, no unauthorized copying or viewing will be performed,
It becomes possible to construct a limited reception system with high confidentiality.

The digital broadcast conditional access apparatus according to the fifth invention of the present application is a digital broadcast conditional access apparatus which converts an encrypted compressed video and
Inputting an audio stream, performing a decoding process, receiving decoding means for outputting a compressed video / audio stream in a communication format, and inputting a compressed video / audio stream in a communication format from the receiving decoding means, Receiving means for decoding a format and outputting a normal compressed video / audio stream;
A decoder for inputting an audio stream, decoding the same, and outputting uncompressed AV data; and inputting uncompressed AV data from the decoder and performing encryption processing.
AV output encrypting means for outputting uncompressed encrypted AV data; and authenticating the existence of the AV output encrypting means.
Authentication control means for validating the reception decryption means if the V output encryption means is present, and restricting the reception decryption means if the AV output encryption means is not present. It is characterized by the following.

The operation of the fifth invention is as follows. The authentication control unit authenticates the existence of the AV output encryption unit by exchanging key information or the like. When the AV output encryption unit is present, the authentication control unit does not limit the reception decryption unit and normally performs Allow decryption processing of. In this case, the receiving decryption unit inputs the communication format-converted encrypted compressed video / audio stream, performs a decoding process, and outputs the communication format compressed video / audio stream to the receiving unit. The receiving unit receives the compressed video / audio stream in the communication format, decodes the format, generates a normal compressed video / audio stream, and outputs the generated stream to the decoder unit. Decoder means, after selectively separating predetermined compressed video and audio data from a normal compressed video and audio stream, decodes video and audio,
The uncompressed AV data is output to the AV output encrypting means. The AV output encryption means performs encryption processing on the uncompressed AV data, outputs the uncompressed encrypted AV data to a display device / speaker or a recording device having a decryption processing function, and performs viewing / listening. Or record.

However, in the authentication of the AV output encrypting means by the authentication control means, if the existence of the AV output encrypting means is not recognized, for example, regarding the high resolution video stream, regardless of the contract contents, The authentication control means imposes restrictions on the receiving decryption means, such as not permitting decryption processing. In this case, therefore, the decryption processing in the receiving decryption means is not performed normally, and a compressed video / audio stream whose encryption has not been decrypted properly is input to the receiving means and the decoder means. In this case, of course, the decoding process of video and audio is not successfully performed, and abnormal AV data is output to the AV output encryption unit.

As described above, the authentication result of the AV output encryption means by the authentication control means is reflected on the control of the reception decryption means. For example, for a high-resolution program broadcast, the AV output encryption function as a copyright protection function is provided. Do not include
Alternatively, when the AV output encrypting means is invalidated, it is possible to construct a highly confidential conditional access system in which unauthorized viewing or illegal copying is not performed even if the scramble is broken.

The digital broadcast conditional access apparatus according to the sixth aspect of the present invention is a digital broadcast conditional access apparatus, comprising:
An audio stream is input, a decoding process is performed, and a receiving decoding means for outputting a compressed video / audio stream in a communication format, and a compressed video / audio stream in the communication format is input from the receiving decoding means. Receiving means for decoding the format and outputting a normal compressed video / audio stream; and inputting the normal compressed video / audio stream from the receiving means, performing encryption processing, and converting the encrypted compressed video / audio stream. The storage encryption means to be output, and the presence of the storage encryption means is authenticated, and if the storage encryption means is present, the reception decryption means is effectively activated.
Authentication control means for restricting the reception decryption means if the storage encryption means does not exist, and an encrypted compressed video / audio stream input from the storage encryption means, and the encrypted compressed video / audio It is characterized by comprising storage control means for performing control for storing a stream, and storage means for storing the encrypted compressed video / audio stream under the control of the storage control means.

The operation of the sixth invention is as follows. The authentication control means authenticates the existence of the storage encryption means by exchanging key information or the like. When the storage encryption means exists, the authentication control means does not limit the reception decryption means and performs normal decryption. Permission processing is allowed. In this case, the receiving decryption means inputs the encrypted compressed video / audio stream whose format has been converted for communication, performs a decryption process,
The compressed video / audio stream in the communication format is output to the receiving means. The receiving means inputs the compressed video / audio stream in the communication format, decrypts the format, generates a normal compressed video / audio stream, and outputs the generated stream to the storage encrypting means. The storage encrypting means performs an encryption process on a normal compressed video / audio stream, and outputs the encrypted compressed video / audio stream to the storage control means. The storage control means stores the encrypted compressed video / audio stream in the storage means. The encrypted compressed video / audio stream stored in the storage means is read out later and output to a display device / speaker or a recording device with a decryption processing function for viewing / listening or recording. .

However, when the authentication control unit authenticates the storage encrypting unit and does not recognize the existence of the storage encrypting unit, for example, the authentication control unit irrespective of the contract content of the high-resolution video stream, regardless of the contract contents. The means imposes restrictions on the receiving decoding means, such as not permitting the decoding process. In this case, therefore, the decryption processing in the receiving decryption means is not performed normally, and the compressed video / audio stream whose encryption has not been decrypted properly is input to the reception means. However, the normal process of generating a compressed video / audio stream through decryption of the format is not successful, and the abnormally encrypted compressed video / audio stream is stored in the storage unit via the storage encryption unit and the storage control unit. Will do.

As described above, since the authentication result of the storage encrypting means by the authentication control means is reflected in the control of the receiving decryption means, for example, for a high-resolution program broadcast, the storage encrypting means as a copyright protection function. If the system does not include or does not enable the encryption means for storage, it is possible to build a highly confidential conditional access system that does not perform unauthorized copying or viewing even if the scramble is broken. Become.

[0034] The digital broadcast conditional access apparatus of the seventh invention of the present application comprises a storage means for storing an encrypted compressed video / audio stream, and an encrypted compressed video / audio stream stored in the storage means.
Storage control means for performing control for extracting the audio stream and outputting an encrypted compressed video / audio stream; and inputting the encrypted compressed video / audio stream from the storage control means, performing decryption processing, and performing Decoding means for outputting a compressed compressed video / audio stream, and a decoder for inputting the non-encrypted compressed video / audio stream from the decoding means for decoding, and outputting uncompressed AV data Means and A which is uncompressed by said decoder means.
V data is input, encrypted, and uncompressed
AV output encrypting means for outputting V data;
The presence of the output encrypting means is authenticated, and if the AV output encrypting means is present, the storage decrypting means is effectively activated.
If there is no output encryption means, authentication control means for limiting the storage decryption means is provided.

The operation of the seventh aspect is as follows. The authentication control means authenticates the existence of the AV output encryption means by exchanging key information or the like. When the AV output encryption means is present, the authentication control means does not limit the storage decryption means, Allow decryption processing of. In this case, the storage control unit extracts the encrypted compressed video / audio stream stored in the storage unit and outputs the stream to the storage decryption unit. The storage decryption means inputs the encrypted compressed video / audio stream, performs a decryption process, and outputs a non-encrypted compressed video / audio stream to the decoder means. The decoder means selectively separates predetermined compressed video / audio data from the non-encrypted compressed video / audio stream, decodes the video and audio, and converts the non-compressed AV data into AV data.
Output to the output encryption means. The AV output encryption means performs encryption processing on the uncompressed AV data, outputs the uncompressed encrypted AV data to a display device / speaker or a recording device having a decryption processing function, and performs viewing / listening. Or record.

However, in the authentication of the AV output encrypting means by the authentication control means, if the existence of the AV output encrypting means is not recognized, for example, regarding the high resolution video stream, regardless of the contract contents, The authentication control means imposes restrictions on the storage decryption means, such as not permitting decryption processing. In this case, therefore, the decoding process in the storage decoding unit is not performed normally, and the compressed video / audio stream whose encryption has not been normally decrypted is input to the decoder unit.
As a matter of course, the decoding processing of video and audio is not successfully performed, and abnormal AV data is output to the AV output encryption unit.

As described above, the authentication result of the AV output encryption means by the authentication control means is reflected in the control of the storage decryption means. For example, for a high-resolution program broadcast, the AV output encryption function as a copyright protection function is provided. Do not include
Alternatively, when the AV output encrypting means is invalidated, it is possible to construct a highly confidential conditional access system in which unauthorized viewing or illegal copying is not performed even if the scramble is broken.

The digital broadcast conditional access apparatus of the eighth invention of the present application comprises a storage means for storing an encrypted compressed video / audio stream, and an encrypted compressed video / audio stream stored in the storage means.
Storage control means for performing control for extracting the audio stream and outputting an encrypted compressed video / audio stream; and inputting the encrypted compressed video / audio stream from the storage control means, performing decryption processing, and performing Storage decoding means for outputting a compressed video / audio stream, and the non-encrypted compressed video / audio stream input from the storage decoding means, format-converted for communication, and Transmitting means for transmitting, a compressed video / audio stream after format conversion is input from the transmitting means, encryption processing is performed, and encrypted transmitting means for outputting an encrypted compressed video / audio stream is output; Authenticates the existence of the encryption means, and if the transmission encryption means is present, the storage decryption means is effective; if the transmission encryption means is not present, the Characterized in that it comprises an authentication control unit configured to limit a product for decoding means.

The operation of the eighth invention is as follows. The authentication control means authenticates the existence of the transmission encryption means by exchanging key information or the like. When the transmission encryption means exists, the authentication control means does not limit the storage decryption means and performs normal decryption. Permission processing is allowed. In this case, the storage control means controls the encrypted compressed video / video stored in the storage means.
The audio stream is extracted and output to the storage decoding means. The storage decryption means inputs the encrypted compressed video / audio stream, performs a decryption process, and outputs the non-encrypted compressed video / audio stream.
Output the audio stream to the transmission means. The transmitting means converts the format of the non-encrypted compressed video / audio stream for communication and outputs it to the transmitting encrypting means. The transmitting encrypting means receives the format-converted compressed video / audio stream from the transmitting means, performs an encryption process, and transmits the encrypted compressed video / audio stream to the outside.

However, in the authentication of the transmission encrypting means by the authentication control means, if the existence of the transmission encrypting means is not recognized, for example, the authentication control means may be applied to the high-resolution video stream regardless of the contract contents. The means imposes restrictions such as not permitting the decoding process on the storage decoding means. In this case, therefore, the decryption processing in the storage decryption means is not performed normally, and the transmission means receives a compressed video / audio stream whose encryption has not been decrypted normally. However, the process of format conversion between video and audio is not successfully performed, and an abnormally encrypted compressed video / audio stream is output to the transmitting encryption unit.

As described above, the authentication result of the transmission encryption means by the authentication control means is reflected on the control of the storage decryption means. For example, for a high-resolution program broadcast, the transmission encryption means as a copyright protection function is provided. If you do not install the transmission or disable the transmission encryption means, it is possible to build a highly confidential conditional access system that will not be illegally viewed or copied even if the scramble is broken Become.

In the digital broadcast conditional access apparatus according to the ninth aspect of the present invention, in the above second, fifth and seventh aspects, the authentication control means may be configured to authenticate the presence of the AV output encryption means. In this method, it is characterized in that the output data of the AV output encrypting means is directly taken in to determine the success or failure of the encryption.

The operation of the ninth invention is as follows. The authentication control means directly captures the output data of the AV output encrypting means to determine whether or not the AV output encrypting means is present, and to actually check the uncompressed AV data by the AV output encrypting means. It is also determined whether or not the data is encrypted and output. If the encryption is not performed normally, a restriction is imposed on the descrambler, the receiving decryption unit, or the storage decrypting unit. Therefore, for example, for high-resolution program broadcasting, even if the encryption means for AV output as a copyright protection function is installed, even if the encryption means for AV output is invalidated and the scramble is broken, In addition, it is possible to construct a conditional access system that has a strong guard against unauthorized viewing and illegal copying and is more excellent in confidentiality.

In the digital broadcast conditional access apparatus according to the tenth aspect of the present invention, in the third and eighth aspects described above, the authentication control means, when authenticating the existence of the transmission encryption means, It is characterized in that the output data of the encrypting means is directly taken in to determine the success or failure of the encryption.

The operation of the tenth aspect is as follows. The authentication control means directly captures the output data of the transmission encryption means, not only as to whether or not the transmission encryption means exists, but also to actually convert the format of video and audio by the transmission encryption means. It is also determined whether or not the conversion is performed.If the format conversion is not performed normally, the descrambler means or the decoding means for storage is limited. Even if the transmission encryption means as a right protection function is installed, even if the transmission encryption means is invalidated and the scramble is broken, there is a strong guard against unauthorized transmission and more excellent confidentiality It is possible to construct a limited reception system.

In the digital broadcast conditional access apparatus according to the eleventh aspect of the present invention, in the fourth and sixth aspects of the invention, the authentication control means may be configured to authenticate the presence of the storage encryption means when authenticating the existence of the storage encryption means. It is characterized in that the output data of the encrypting means is directly taken in to determine the success or failure of the encryption.

The operation of the eleventh invention is as follows. The authentication control means directly takes in the output data of the storage encryption means, and not only determines whether or not the storage encryption means is present, but also actually stores the normal compressed video / audio stream by the storage encryption means. It is also determined whether or not encryption processing has been performed on, and if the encryption processing is not performed normally, a restriction is imposed on the descrambler means or reception decryption means.
Regarding high-definition program broadcasting, even if the encryption means for storage as a copyright protection function is installed, even if the scrambling is broken by disabling the encryption means for storage,
It is possible to construct a conditional access system that has a strong guard against unauthorized communication and that is more excellent in confidentiality.

In the digital broadcast conditional access apparatus according to the twelfth aspect of the present invention, in the second and ninth aspects of the present invention, the authentication control means determines whether or not the AV output encrypting means is present. Instead of controlling the rambler means, the decoder means is controlled.

[0049] In the digital broadcast conditional access apparatus according to the thirteenth aspect of the present invention, in the third and tenth aspects of the present invention, the authentication control means may determine whether or not the transmission encrypting means is present based on the authentication result. Instead of controlling the means,
The transmission means is controlled.

In the digital broadcast conditional access apparatus according to the fourteenth aspect of the present invention, in the fourth and eleventh aspects of the present invention, the authentication control means determines the presence or absence of the storage encrypting means based on the authentication result. Instead of controlling the means,
The storage control unit is controlled.

In the digital broadcast conditional access apparatus according to the fifteenth aspect of the present invention, in the fifth and ninth aspects of the present invention, the authentication control means determines whether or not the AV output encryption means is present. Instead of controlling the decoding means, the decoder means is controlled.

In the digital broadcasting limited receiving apparatus according to a sixteenth aspect of the present invention, in the sixth and eleventh aspects of the present invention, the authentication control means determines whether or not the receiving encrypting means is present based on the authentication result. Instead of controlling the decoding means, the storage control means is controlled.

In the seventeenth and ninth aspects of the present invention, in the digital broadcast conditional access apparatus according to the seventeenth aspect, the authentication control means determines whether or not the AV output encryption means is present. Instead of controlling the control means, the decoder means is controlled.

In the digital broadcast conditional access apparatus according to an eighteenth aspect of the present invention, in the eighth and tenth aspects of the present invention, the authentication control means determines the presence of the transmission encryption means based on an authentication result of the presence / absence of the transmission encryption means. Instead of controlling the decoding means, the storage control means or the transmission means is controlled.

In the twelfth to eighteenth aspects of the present invention, for a high-resolution program broadcast, even if any type of encryption means as a copyright protection function is provided, the encryption means is not used. Even if the scramble is broken by invalidation, it is possible to construct a conditional access system that is more guarded against unauthorized use and more excellent in confidentiality.

In the above description, each means may be constituted by hardware, may be constituted by software, or each part may be constituted by hardware and the remaining part may be constituted by software. Good.

(Specific Embodiment) Hereinafter, a specific embodiment of the digital broadcast conditional access apparatus according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows a system configuration diagram of a digital broadcast limited receiving apparatus according to Embodiment 1 (corresponding to claim 2) of the present invention. Rambler unit 1, decoder unit 2 as decoder unit, AV as AV output encryption unit
Output encryption unit 3, authentication control unit 21 as authentication control means
It is composed of

The operation of the digital broadcasting limited receiving apparatus configured as described above will be described below.

First, the authentication control unit 21 authenticates the existence of the AV output encryption unit 3 by exchanging key information or the like, and transmits the authentication result to the descrambler unit 1.

The descrambler 1 inputs a transport stream which is a scrambled compressed video / audio stream, performs descrambling processing according to the contract contents as shown in the conventional example, and cancels the descrambling. The transport stream is output to the decoder unit 2. At this time, if the authentication result of the authentication control unit 21 does not recognize the existence of the AV output encryption unit 3, for example, a contract for a high-resolution video stream is made. Regardless of the content, the authentication control unit 21 imposes restrictions on the descrambler unit 1 such as not permitting descrambling processing.

Next, in the decoder section 2, as in the conventional example,
After selectively separating predetermined compressed video and audio data from the descrambled transport stream, the video and audio are decoded, and the uncompressed AV data is output to the AV output encryption unit 3. However, when a transport stream that has not been descrambled is input from the descrambler unit 1, video and audio decoding processing is not successfully performed, and abnormal AV data is output to the AV output encryption unit 3. Will be.

Finally, the AV output encrypting section 3 performs an encryption process on the uncompressed AV data and transmits the uncompressed encrypted AV data to a display device / speaker or a recording device having a decryption processing function. Output and display or record.

(Embodiment 2) FIG. 2 shows a system configuration diagram of a digital broadcast limited receiving apparatus according to Embodiment 2 (corresponding to claim 3) of the present invention. It comprises a transmission unit 6 as a means, a transmission encryption unit 7 as a transmission encryption unit, and an authentication control unit 22 as an authentication control unit. The descrambler 1 has the same configuration as that of FIG.

The operation of the digital broadcasting limited receiving apparatus configured as described above will be described below.

First, the authentication control unit 22 authenticates the existence of the transmission encryption unit 7 by exchanging key information or the like, and transmits the authentication result to the descrambler unit 1. The descrambler unit 1 performs the same processing as in FIG. do.

Next, the transmitting unit 6 converts the descrambled transport stream into a format such as packet division for communication, and outputs the packetized transport stream to the transmitting encryption unit 7. However, when a transport stream that has not been scrambled is input from the descrambler unit 1, the transport stream that has been scrambled is naturally packetized and output to the transmission encryption unit 7.

Finally, the transmission encryption unit 7 performs an encryption process on the packetized transport stream, and converts the encrypted packetized transport stream into a display device / speaker with a decryption process function. Or to a recording device for display or recording.

(Embodiment 3) FIG. 3 shows a system configuration diagram of a digital broadcasting limited receiving apparatus according to Embodiment 3 (corresponding to claim 4) of the present invention. It comprises a storage control unit 8 as a control unit, a storage unit 9 as a storage unit, a storage encryption unit 11 as a storage encryption unit, and an authentication control unit 23 as an authentication control unit. Note that the descrambler unit 1 has the same configuration as that of FIGS.

The operation of the digital broadcast conditional access apparatus configured as described above will be described below.

First, the authentication control unit 23 authenticates the existence of the storage encryption unit 11 by exchanging key information or the like, and transmits the authentication result to the descrambler unit 1.
The same processing as in FIG. 1 is performed.

Next, the storage encryption unit 11 performs an encryption process on the descrambled transport stream, and outputs the encrypted descrambled transport stream to the storage control unit 8. However, when a transport stream that has not been scrambled is input from the descrambler 1, the transport stream that has been scrambled is output to the accumulation controller 8 as it is.

Finally, the storage control unit 8 controls the storage unit 9 to store and record the encrypted transport stream in the storage unit 9.

(Embodiment 4) FIG. 4 shows a system configuration diagram of a digital broadcasting limited receiving apparatus according to Embodiment 4 (corresponding to claim 5) of the present invention.
It comprises an output encryption unit 3, a reception decryption unit 4 as the above-described reception decryption unit, a reception unit 5 as a reception unit, and an authentication control unit 24 as an authentication control unit. The decoder section 2 and the AV output encryption section 3 have the same configuration as that of FIG.

The operation of the digital broadcasting limited receiving apparatus configured as described above will be described below.

First, the authentication control unit 24 authenticates the existence of the AV output encryption unit 3 by exchanging key information or the like, and transmits the authentication result to the reception decryption unit 4.

The receiving decryption unit 4 receives the encrypted transport stream packetized for communication, performs decryption processing, and outputs the packetized unencrypted transport stream to the receiving unit 5. However, at this time, if the authentication result of the authentication control unit 24 does not recognize the existence of the AV output encryption unit 3, the authentication control unit 24
Are restricted such that the descrambling process is not permitted.

Next, the receiving unit 5 depackets the packets of the transport stream and outputs a normal transport stream to the decoder unit 2.

Decoder section 2 and AV output encryption section 3
Then, the same processing as in FIG. 1 is performed, and the uncompressed encrypted AV data is output to a display device / speaker or a recording device having a decryption processing function to be displayed or recorded.

(Embodiment 5) FIG. 5 shows a system configuration diagram of a digital broadcasting limited receiving apparatus according to Embodiment 5 (corresponding to claim 6) of the present invention. 5, storage control unit 8, storage unit 9, storage encryption unit 11,
It comprises an authentication control unit 25 as the above-mentioned authentication control means. Note that the receiving decoding unit 4 and the receiving unit 5
And the storage control unit 8, the storage unit 9, and the storage encryption unit 11 are the same as those in FIG.

The digital broadcasting limited receiving apparatus configured as described above authenticates the existence of the storage encryption unit 11 by exchanging key information and the like, and the authentication control unit 25 transmits the authentication result to the reception decryption unit 4. Is a combination of FIG. 3 and FIG. 4, and the description of the operation is omitted here.

(Embodiment 6) FIG. 6 shows a system configuration diagram of a digital broadcasting limited receiving apparatus according to Embodiment 6 (corresponding to claim 7) of the present invention.
It comprises an output encryption unit 3, a storage control unit 8, a storage unit 9, a storage decryption unit 12, and an authentication control unit 26 as the above-described authentication control unit. The decoder unit 2 and the AV output encryption unit 3 have the same configuration as in FIG. 1, and the storage control unit 8 and the storage unit 9 have the same configuration as in FIG. The storage control unit 8 controls both storage and reading of the encrypted compressed video / audio stream in the storage unit 9. However, it may be configured as two accumulation control units having these two functions individually.

The operation of the digital broadcasting limited receiving apparatus configured as described above will be described below.

First, the authentication control unit 26 authenticates the existence of the AV output encryption unit 3 by exchanging key information or the like, and transmits the authentication result to the storage decryption unit 12.

The accumulation control unit 8 controls the accumulation unit 9 to
The encrypted transport stream is extracted from the storage unit 9 and output to the storage decryption unit 12.

The storage decryption unit 12 decrypts the encrypted transport stream and outputs an unencrypted transport stream to the decoder unit 2. At this time, the authentication result of the authentication control unit 26 is used. AV output encryption unit 3
In the case where the presence of is not recognized, the authentication control unit 26 imposes restrictions on the storage decryption unit 12 such as not permitting the descrambling process.

Next, the decoder unit 2 and the AV output encryption unit 3 perform the same processing as in FIG. 1 to convert the uncompressed encrypted AV data into a display device / speaker or recording device having a decryption function. Output, display, and record.

(Embodiment 7) FIG. 7 shows a system configuration diagram of a digital broadcasting limited receiving apparatus according to an embodiment 7 (corresponding to claim 8) of the present invention. 7, storage control unit 8, storage unit 9, storage decoding unit 12,
It comprises an authentication control unit 27 as the above-mentioned authentication control means. The transmission unit 6 and the transmission encryption unit 7 are the same as those in FIG.
And the storage control unit 8, storage unit 9 and storage decoding unit 12 are the same as those in FIG.

The digital broadcasting limited reception apparatus configured as described above authenticates the existence of the transmission encryption unit 7 by exchanging key information and the like, and the authentication control unit 27 transmits the authentication result to the storage decryption unit 12. Is a combination of FIG. 2 and FIG. 6, and the description of the operation is omitted here.

(Eighth Embodiment) FIG. 8 is a diagram showing a system configuration of a digital broadcasting limited receiving apparatus according to an eighth embodiment of the present invention.
AV output encryption unit 3, reception decryption unit 4, reception unit 5, transmission unit 6, transmission encryption unit 7, storage control unit 8, storage unit 9, storage encryption unit 11, storage decryption unit 12, It comprises an authentication control unit 28 as authentication control means and switches 29 and 30 as switching means. It should be noted that the descrambler unit 1, the decoder unit 2, and the AV output encryption unit 3 are shown in FIG.
, The receiving decryption unit 4 and the receiving unit 5 are configured as shown in FIG. 4, the transmitting unit 6 and the transmitting encrypting unit 7 are configured as shown in FIG. 2, and the storage control unit 8, the storing unit 9 and the storing encryption unit 11 are used. 3 is the same as the configuration in FIG. 3, and the storage decoding unit 12 is the same as the configuration in FIG.

In the digital broadcasting limited receiving apparatus configured as described above, the existence of each of the AV output encryption unit 3, the transmission encryption unit 7, and the storage encryption unit 11 is authenticated by exchanging key information or the like. The components other than the authentication control unit 28 and the switches 29 and 30 for transmitting the authentication result to each of the descrambler unit 1, the reception decryption unit 4 and the storage decryption unit 12 are integrated by a combination of FIG. 1 to FIG. The description of the operation will be omitted.

The switch 29 has a function of switching between the descrambler unit 1 and the receiving unit 5 as its input side, and a function of switching between the storage encryption unit 11 and the switch 30 as its output side. It has a function of switching between the storage decoding unit 12 and the switch 29 as its input side, and a function of switching between the decoder unit 2 and the transmission unit 6 as its output side. Switch 29 and Switch 3
0 is controlled in conjunction with one of the modes shown in FIGS. 1 to 7 so that the mode can be selected.

Although the description of the operation is omitted here as a mere combination of FIGS. 1 to 7, the authentication control unit 28
, The descrambler unit 1, the receiving decryption unit 4,
Instead of directly restricting each of the storage decoding units 12, it is also possible to implement control by restricting the paths of the switches 29 and 30.

(Embodiment 9) FIG. 9 is a diagram showing a system configuration of a digital broadcast limited receiving apparatus according to Embodiment 9 (corresponding to claim 9) of the present invention, wherein a descrambler unit 1 and a decoder unit 2 are shown. , An AV output encryption unit 3, and an authentication control unit 31 as the authentication control unit described above. The descrambler 1, the decoder 2 and the AV output encryption unit 3 have the same configuration as in FIG.

In the digital broadcasting limited receiving apparatus configured as described above, the uncompressed encrypted AV data which is the output data of the AV output encrypting section 3 is directly taken in, and
Authentication control that determines whether not only the output encryption unit 3 is present but also whether uncompressed AV data is actually encrypted and output from the output encryption unit 3 and transmits the determination result to the descrambler unit 1 Except for the part 31, it is the same as FIG.
Here, the description of the operation is omitted.

In the above description, the example of the authentication control unit that authenticates the existence of the AV output encryption unit 3 and reflects it in the control of the descrambler unit 1 has been described.
Instead of performing the presence authentication of the transmission encryption unit 7 or the storage encryption unit 11, the reception decryption unit 4 or the storage decryption unit may be used instead of the control of the descrambler unit 1. The present invention can be implemented by taking the control of the control unit 12, the reception unit 5, the accumulation control unit 8, or the transmission unit 6 as an example.

(Embodiment 10) FIG. 10 is a block diagram showing a system configuration of a digital broadcasting limited receiving apparatus according to an embodiment 10 (corresponding to claim 10) of the present invention. It comprises a control section 32, a descrambler section 33 as descrambler means, a decoder section 34 as decoder means, and an AV output encryption section 35 as AV output encryption means. The descrambler 33 has the same configuration as that of the conventional example.

The operation of the digital broadcast conditional access apparatus configured as described above will be described below.

First, the authentication control section 32 authenticates the existence of the AV output encryption section 35 by exchanging key information or the like, and transmits the authentication result to the decoder section 34 instead of the descrambler section 33.

The descrambler 33 performs descrambling according to the contract content as in the conventional example, and outputs the descrambled transport stream to the decoder 34.

Next, the decoder section 34 selectively separates predetermined compressed video and audio data from the descrambled transport stream, decodes the video and audio, and outputs a medium-resolution analog non-compressed image. It outputs AV data and high-resolution digital uncompressed AV data. However, at this time, the authentication result of the authentication control unit 32 is AV
If the existence of the output encryption unit 35 is not recognized, for example, the decoding process is not performed for the high-resolution video stream, or even if the decoding process is performed, the medium-resolution analog uncompressed AV data Is always directly output to an analog display device / speaker or a recording device, but there is a restriction that high-resolution digital uncompressed AV data is not output to the AV output encryption unit 35.

Finally, the AV output encryption section 35 performs an encryption process on the high-resolution digital uncompressed AV data, and has a function of decrypting the encrypted high-resolution digital uncompressed AV data. Output to a display device / speaker or recording device to display or record.

In the above description, the AV data output from the decoder section 34 is a medium resolution analog uncompressed A
The V data and the high resolution digital uncompressed AV data have been described, but the high resolution digital uncompressed AV data may be used.

In the above description, the example of the authentication control unit for authenticating the existence of the AV output encryption unit and reflecting the result in the control of the decoder unit has been described. The authentication of the existence of the transmission encryption unit or the storage encryption unit can be performed by taking the control of the transmission unit or the storage control unit as an example instead of the control of the decoder unit.

[0105]

As described above, according to the present invention, the copyright control is provided by controlling the reception / reproduction processing according to the authentication result of the encryption section of the copyright protection function provided in the output stage. In addition to providing a highly confidential digital broadcasting limited receiving apparatus having a double check function with a protection function, a digital broadcasting limited receiving apparatus that does not have a copyright protection function or is invalid has a high level. An advantageous effect is obtained in that restriction can be imposed on conditional access such as reception of a program with a high resolution.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a digital broadcast conditional access apparatus according to a first embodiment of the present invention.

FIG. 2 is a system configuration diagram of a digital broadcast conditional access apparatus according to a second embodiment of the present invention;

FIG. 3 is a system configuration diagram of a digital broadcast conditional access apparatus according to a third embodiment of the present invention;

FIG. 4 is a system configuration diagram of a digital broadcast conditional access apparatus according to a fourth embodiment of the present invention;

FIG. 5 is a system configuration diagram of a digital broadcast conditional access apparatus according to a fifth embodiment of the present invention.

FIG. 6 is a system configuration diagram of a digital broadcast conditional access apparatus according to a sixth embodiment of the present invention;

FIG. 7 is a system configuration diagram of a digital broadcast conditional access apparatus according to a seventh embodiment of the present invention;

FIG. 8 is a system configuration diagram of a digital broadcast conditional access apparatus according to an eighth embodiment of the present invention;

FIG. 9 is a system configuration diagram of a digital broadcast conditional access apparatus according to a ninth embodiment of the present invention;

FIG. 10 is a system configuration diagram of a digital broadcast conditional access apparatus according to a tenth embodiment of the present invention.

FIG. 11 is a system configuration diagram of a conventional digital broadcast conditional access apparatus.

[Explanation of symbols]

1, 33 descrambler unit (descrambler unit) 2, 34 decoder unit (decoder unit) 3, 35 AV output encryption unit (AV output encryption unit) 4 reception decryption unit (reception decryption unit) 5 reception unit (Receiving unit) 6 Transmitting unit (transmitting unit) 7 Transmitting encryption unit (transmission encrypting unit) 8 Storage control unit (storage control unit) 9 Storage unit (storage unit) 11 Storage encryption unit (storage encryption unit) 12) Decoding unit for storage (decoding means for storage) 21, 22, 23, 24, 25, 26, 27, 28, 3
1,32 Authentication control unit (authentication control means)

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 7/08 H04L 9/00 675Z 5K061 7/081 H04N 7/08 Z F term (reference) 5C025 BA25 BA27 BA30 DA01 5C063 AB03 CA11 CA23 CA29 CA31 DA07 5C064 BA01 BB10 BC17 BC22 BC23 BC25 BC27 BD08 BD09 5D045 DA20 5J104 AA07 BA03 KA01 PA05 5K061 AA12 BB06 BB15

Claims (18)

[Claims] 1. A digital broadcast limited receiving apparatus characterized in that an encryption means of a copyright protection function in an output stage is authenticated, and reception / reproduction processing is restricted according to a result of the authentication. 2. A descrambler for inputting a scrambled compressed video / audio stream, performing descrambling according to the contract contents, and outputting a descrambled compressed video / audio stream, and the descrambler. A decoder for inputting a compressed video / audio stream, decoding the same, and outputting uncompressed AV data; and inputting the non-compressed AV data from the decoder, encrypting the same, A that outputs formatted AV data
V output encrypting means, and the presence of the AV output encrypting means are authenticated. If the AV output encrypting means is present, the descrambler means is enabled, and the AV output encrypting means is present. A digital broadcast limited receiving device, comprising: authentication control means for restricting the descrambler means if not present. 3. A descrambler for inputting a scrambled compressed video / audio stream, performing descrambling according to the contract contents, and outputting a descrambled compressed video / audio stream, and the descrambler. Compressed video / audio stream is input and converted for communication.
A transmitting unit that transmits an audio stream; a compressed video / audio stream after format conversion is input from the transmitting unit; an encryption process is performed; and a transmission encrypting unit that outputs an encrypted compressed video / audio stream; Authenticates the existence of the transmission encryption means, and if the transmission encryption means exists, effectively activates the descrambler means,
A digital broadcast limited reception device comprising: an authentication control unit for restricting the descrambler unit if the transmission encryption unit does not exist. 4. A descrambler for inputting a scrambled compressed video / audio stream, performing descrambling according to the contract contents, and outputting a descrambled compressed video / audio stream, and the descrambler. A storage encrypting means for inputting a compressed video / audio stream, performing an encryption process, and outputting an encrypted compressed video / audio stream, authenticating the existence of the storage encrypting means, and storing an encrypting means. If there is, enable the descrambler means,
Authentication control means for restricting the descrambler means if the storage encryption means is not present; and an encrypted compressed video / audio stream input from the storage encryption means, and the encrypted compressed video / audio stream A digital broadcast limited receiving apparatus, comprising: a storage control unit that controls the storage of the encrypted compressed video / audio stream under the control of the storage control unit. 5. An encrypted compressed video / audio stream whose format has been converted for communication is input and decrypted.
A receiving decoding means for outputting a compressed video / audio stream in a communication format, and a compressed video / audio stream in a communication format is input from the receiving decoding means, the format is decoded, and a normal compressed video / audio stream is Receiving means for outputting, the decoder means for inputting the normal compressed video / audio stream from the receiving means, decoding and outputting uncompressed AV data, and inputting uncompressed AV data from the decoder means A that performs encryption processing and outputs uncompressed encrypted AV data
V encryption means for output, and the existence of the encryption means for AV output are authenticated. If the encryption means for AV output exists, the decryption means for reception is enabled, and the encryption means for AV output exists. An authentication control means for restricting the reception decoding means if the reception has not been performed. 6. An encrypted compressed video / audio stream whose format has been converted for communication is input, and decrypted,
A receiving decoding means for outputting a compressed video / audio stream in a communication format; a compressed video / audio stream in the communication format being input from the receiving decoding means; decoding the format; Receiving means for inputting the normal compressed video / audio stream from the receiving means, performing encryption processing, and outputting an encrypted compressed video / audio stream; and Authentication control for authenticating the existence of the encrypting means and validating the receiving decrypting means if the storing encrypting means is present, and restricting the receiving decrypting means if the storing encrypting means is not present Means for inputting an encrypted compressed video / audio stream from the storage encrypting means and performing control for storing the encrypted compressed video / audio stream. A digital broadcast limited reception apparatus comprising: a storage control unit; and a storage unit configured to store the encrypted compressed video / audio stream under the control of the storage control unit. 7. A storage means for storing an encrypted compressed video / audio stream, and a control for extracting the encrypted compressed video / audio stream stored in the storage means, and
A storage control unit that outputs an audio stream; a storage decryption unit that inputs an encrypted compressed video / audio stream from the storage control unit, performs a decryption process, and outputs a non-encrypted compressed video / audio stream. Receiving the unencrypted compressed video / audio stream from the storage decryption means, decoding the uncompressed video / audio stream,
A decoder for outputting data; and A for inputting uncompressed AV data from the decoder, performing encryption processing, and outputting uncompressed encrypted AV data.
The V output encryption means and the AV output encryption means are authenticated. If the AV output encryption means is present, the storage decryption means is enabled, and the AV output encryption means is present. An authentication control means for restricting the storage decryption means if the authentication has not been performed. 8. A storage means for storing an encrypted compressed video / audio stream, and a control for taking out the encrypted compressed video / audio stream stored in the storage means, and
A storage control unit that outputs an audio stream; a storage decryption unit that inputs an encrypted compressed video / audio stream from the storage control unit, performs a decryption process, and outputs a non-encrypted compressed video / audio stream. Inputting the non-encrypted compressed video / audio stream from the storage decryption means, converting the format for communication,
A transmitting unit for transmitting the compressed video / audio stream; and a transmitting encrypting unit for inputting the format-converted compressed video / audio stream from the transmitting unit, performing an encryption process, and outputting an encrypted compressed video / audio stream. Authenticating the existence of the transmission encryption means, enabling the storage decryption means if the transmission encryption means is present, and the storage decryption means if the transmission encryption means is not present And an authentication control means for restricting the digital broadcast. 9. The authentication control unit, when authenticating the existence of the AV output encryption unit, directly takes in output data of the AV output encryption unit and determines whether encryption is successful or not. The digital broadcast conditional access apparatus according to claim 2, 5, or 7, wherein 10. The authentication control unit, when authenticating the existence of the transmission encryption unit, directly takes in output data of the transmission encryption unit and determines whether encryption is successful or not. The digital broadcasting limited receiving device according to claim 3 or 8, wherein 11. The authentication control unit, when authenticating the existence of the storage encrypting unit, directly takes in output data of the storage encrypting unit and determines whether encryption is successful or not. The digital broadcast conditional access apparatus according to claim 4 or 6, wherein 12. The authentication control means controls the decoder means instead of controlling the descrambler means according to the result of authentication of the presence or absence of the AV output encryption means. The digital broadcast conditional access apparatus according to claim 2 or 9. 13. The apparatus according to claim 3, wherein said authentication control means controls said transmission means in accordance with an authentication result of the presence or absence of said transmission encryption means, instead of controlling said descrambler means. Alternatively, the digital broadcast conditional access apparatus according to claim 10. 14. The method according to claim 1, wherein the authentication control means controls the storage control means instead of controlling the descrambler means in accordance with the authentication result of the presence / absence of the storage encryption means. A digital broadcast conditional access apparatus according to claim 4 or claim 11. 15. The method according to claim 15, wherein the authentication control means controls the decoder means instead of controlling the reception decryption means based on the result of the authentication as to whether or not the AV output encryption means exists. The digital broadcast conditional access apparatus according to claim 5 or 9. 16. The authentication control means according to claim 1, wherein said authentication control means controls said storage control means in place of controlling said reception decryption means based on an authentication result of the presence / absence of said storage encryption means. The digital broadcast conditional access apparatus according to claim 6 or 11. 17. The authentication control means according to claim 1, wherein said authentication control means controls said decoder means instead of controlling said storage control means based on an authentication result of the presence or absence of said AV output encryption means. The digital broadcast conditional access device according to claim 7 or 9. 18. The authentication control means controls the storage control means or the transmission means, instead of controlling the storage decryption means, based on an authentication result of the presence / absence of the transmission encryption means. The digital broadcast conditional access apparatus according to claim 8 or 10, wherein