JP2008078950A - Information processor and processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor and an information processing method by which copyright is surely protected even when digital content is accumulated by different recording systems. <P>SOLUTION: The information processor 104 is provided with: a digital broadcast receiving module 110; a transcoding module 101, a large capacity storage device 116 and an authentication function part 113 which registers mode information for distinguishing a TS recording mode from transcoding by adding them to content authentication data when performing content authentication registration of content data received by the digital broadcast receiving module 110 and permits reproduction or a move of the content data when a reproduction mode is coincident with mode information on the basis of the reproduction mode in the reproduction or the move of the content data and the mode information when the content data stored in the large capacity storage device 116 is reproduced or moved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information processing apparatus and information processing method for prohibiting unauthorized tampering and copying in storage of content that is subject to copyright protection or reproduction, editing, and movement of stored content. The present invention relates to a technology that is effective when applied to copyright protection during content authentication.

  2. Description of the Related Art In recent years, copy control technology for protecting copyrighted digital content has been used for digital information devices that can easily handle digital content such as moving images and music / sound, and media for recording digital content.

  Conventionally, there has been an information processing apparatus that stores digital contents by different recording methods, such as when digital contents are stored as they are, as well as when digital contents are transcoded and stored.

  However, conventionally, when digital contents are stored in different recording methods, content authentication is not distinguished in different recording methods. For example, the transcoding processing unit is configured with a module different from the module that performs digital authentication, When configured by the processing of the processing unit of the information processing apparatus, the validity of the digital authentication in the transcoding processing unit cannot be confirmed, and in this processing in the transcoding processing unit, an attack from the outside For example, there is a problem that copyright protection of digital contents cannot be reliably performed.

  Accordingly, an object of the present invention is to provide an information processing apparatus and an information processing method capable of reliably performing copyright protection even when digital contents are stored in different recording methods.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  An information processing apparatus according to the present invention is an information processing apparatus that processes digital content, and receives a digital content, and the received digital content is processed in a first recording mode by a content receiving unit and a content receiving unit. A content processing unit that processes the received digital content in the second recording mode, a storage unit that stores content data processed by the content receiving unit and the content processing unit, and a content authentication registration of the content data When mode information for distinguishing one recording mode or the second recording mode is added to the content authentication data and registered, and the content data stored in the storage unit is reproduced or moved, the content data is reproduced or reproduced during the move. Based on the mode and mode information, the playback mode and mode If a match is found, it and an authentication section for permitting reproduction or move of the content data.

  The information processing method according to the present invention is an information processing method for processing digital content, wherein the content receiving unit receives the digital content, and the received digital content is processed and stored in the first recording mode. The content processing unit stores the digital content received by the content receiving unit in the second recording mode, stores the content as content data in the storage unit, and performs content authentication registration of the content data. When mode information for distinguishing between the first recording mode and the second recording mode is added to the content authentication data and registered, and when reproducing or moving the content data stored in the storage unit, when reproducing or moving the content data Based on the playback mode and mode information If the over-de information matches, it is to allow the reproduction or move of the content data.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  According to the present invention, copyright protection can be reliably performed even when digital contents are stored in different recording methods.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  The configuration of the information processing apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 and FIG. 2 are configuration diagrams showing the configuration of an information processing apparatus according to an embodiment of the present invention. FIG. 1 shows a set-top box including a transcoding module that performs transcoding as the information processing apparatus, for example. FIG. 2 shows a configuration of a personal computer that performs transcoding by processing of a processor, for example, as an information processing apparatus.

  In FIG. 1, an information processing apparatus 104 receives a digital broadcast, a transcoding module 101 that is a content processing unit that compresses a data amount by converting a data format, and a digital broadcast reception that is a content reception unit that processes digital content. Module 110, mass storage controller 115, mass storage device 116 that is a storage unit such as a hard disk (HDD), media control unit 117 that controls reading and writing of contents to moveable media, DVD-RW, DVD-RAM And a media 118 such as an SD card, and a video / audio output unit 119 for outputting decoded video and audio.

  In addition, the transcoding module 101, the digital broadcast receiving module 110, the mass storage device controller 115, and the media control unit 117 are connected via an internal bus 114.

  The video / audio output unit 119 outputs a digital or analog output via the output terminal 120 and is connected to a display or a speaker.

  The digital broadcast receiving module 110 includes a digital broadcast tuner 109 to which a digital broadcast antenna (or cable TV broadcast coaxial cable) 108 is connected, a transport stream (TS) analysis unit for separating multiplexed data. (TS Demux) 107, video / audio decoder A106, output control unit 105 for controlling output to the transcoding module, output control unit 111 for controlling output to the internal bus, for example, a non-volatile memory 112 such as a flash ROM, For broadcast data stored in the capacity storage device 116, an authentication function unit 113 that is an authentication unit for performing content authentication registration at the time of recording and content authentication at the time of reproduction / move, encryption at the time of recording broadcast data, at the time of reproduction / move The encryption control unit 121 is configured to decrypt .

  The output control unit 105 and the output control unit 111 are controlled by the authorization function permission information and the recording mode, and are controlled to output exclusively.

  The transcoding module 101 includes a video / audio decoder B (decodes a format different from the video / audio decoder A106) 102, a video / audio encoder B (encodes to a format different from the video / audio decoder A106) 103, broadcast data The encryption control unit 122 performs encryption during recording and decryption during playback / move.

  In FIG. 2, an information processing apparatus 201 includes a digital broadcast receiving module 202, a nonvolatile memory 210 connected to the digital broadcast receiving module 202, a mass storage device 209 such as a hard disk (HDD), a volatile memory 208, a communication I / O. F205, a processor 206, and a media control unit 207 that performs control to read / write content from / to a moveable medium.

  A digital broadcast antenna (or a coaxial cable for cable TV broadcast) 211 and a display / speaker 203 are connected to the digital broadcast receiving module 202.

  The communication I / F 205 is connected to the Internet / intranet.

  Further, the digital broadcast receiving module 202, the mass storage device 209, the volatile memory 208, the communication I / F 205, the processor 206, and the media control unit 207 are connected via the bus 204.

  The information processing apparatus 201 shown in FIG. 2 receives content from digital terrestrial broadcasting or the Internet, and has an editing function mainly for dividing and combining content in addition to recording / playback, and records it on a recording medium. Further, the processor 206 performs data processing and module control in accordance with a program loaded from the mass storage device 209 to the volatile memory 208.

  The digital broadcasting module 202 receives radio waves from a digital broadcasting antenna (or a coaxial cable for cable TV broadcasting) 211 by a TV tuner function, selects a channel, and decrypts encrypted digital broadcasting data. An imaging process is performed, and digital data is converted into a physical signal by an audio / video output function provided therein, and output to the display / speaker 203.

  The non-volatile memory 210 is connected to the digital broadcasting module 202 and records session information such as recording and playback in a recording area that cannot be directly accessed from the outside, such as the bus 204, and verifies the authenticity (tampering detection) of each content unit. To store information.

  Further, the information processing apparatus 201 shown in FIG. 2 has a configuration in which the processing of the transcoding module 101 of the information processing apparatus 104 shown in FIG. 1 is performed by the processor 206, and the content authentication and encryption processing are performed in FIG. The information processing apparatus 104 is the same as the information processing apparatus 104, and the following description will be made using the information processing apparatus 104 shown in FIG.

  Next, the operation of the encryption control unit of the information processing apparatus according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4 are explanatory diagrams for explaining the operation of the encryption control unit of the information processing apparatus according to the embodiment of the present invention. FIG. 3 shows the operation by the authentication method of the encryption key seed, and FIG. The operation by the check data authentication method is shown.

  As shown in FIG. 3, the operation by the encryption key seed authentication method is as follows. First, input data 302 sequentially input from input data (non-encrypted data at the time of recording, encrypted data at the time of playback / move) 301 is input. The encryption / decryption unit 303 (the same encryption key is used for each block of a certain size) is encrypted or decrypted, and the encrypted or decrypted output data (encrypted and reproduced during recording) Decrypted when moving) 312 is sequentially output as output data 313 (encrypted data during recording, unencrypted data during playback and moving) 313.

  Also, for encryption, the encryption key seed generation unit 305 generates an encryption key seed that is the source of the encryption key of the target block, and the encryption key generation unit 304 to which the encryption key seed 307 is input sets the target. The encryption key of the block to be generated is generated, and the encryption key is output to the encryption / decryption unit 303 and used as the encryption key of the encryption / decryption unit 303.

  The encryption key seed 307 is sent to the authentication function unit 113 at the end of recording as the entire encryption key seed data group 309 of the recorded content.

  Further, the authenticated data 311 is input from the authentication function unit 113 before the reproduction / move starts, and the encryption key seed 308 of the target block is extracted.

  The encryption key seed 308 is input to the encryption key generation unit 304, and the encryption key generation unit 304 generates the encryption key of the target block. The encryption key is output to the encryption / decryption unit 303, and the encryption / decryption unit 303 Used as an encryption key for the decryption unit 303.

  In addition, as shown in FIG. 4, the tamper check data authentication method includes input data 402 that is sequentially input from input data 401 (non-encrypted data during recording and encrypted data during playback / move). The encryption / decryption unit 403 (the same encryption key is used in a block unit of a certain size, and this encryption key is generated internally) is encrypted or decrypted, and the encrypted or decrypted output data (Encrypted during recording, decrypted during playback / move) 415 is sequentially output as output data (encrypted data during recording, unencrypted data during playback / move) 414 via the output control unit 413. Is done.

  The input data 402 is input to a tamper check data extraction unit 405, and tamper check data 407 is extracted and output. The tampering check data 407 is extracted from the block before encryption at the time of recording.

  The tampering check data 407 is stored as a tampering check data group 409 for the entire recorded content at the time of recording, and is sent to the authentication function unit 113 after recording and is registered for authentication.

  In addition, authenticated tampering check data is input from the authentication function unit 113 before playback / move starts, and tampering check data 408 for the target block is prepared from the authenticated tampering check data group.

  Further, the alteration check data 404 and the alteration check data 408 extracted by the alteration check data extraction unit 405 from the block of the output data 415 decrypted at the time of reproduction / move are checked by the alteration check unit 412 to detect alteration.

  When the alteration check unit 412 detects the alteration of the content, the output control unit 413 stops the output.

  This falsification check data authentication method is an independent method in which the encryption key generation and the falsification check based on the authentication result are independent, and can also be applied when the encryption key generation method cannot be changed.

  Next, the operation of the authentication function unit of the information processing apparatus according to the embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram for explaining the operation of the authentication function unit of the information processing apparatus according to the embodiment of the present invention.

  First, the authentication target input data 505 is input at the end of recording, and the input authentication target data 507 (the encryption key seed data group shown in FIG. 3 and the tamper check data group shown in FIG. 4) is hashed by the Hash calculation unit 504. An operation is added to calculate small size data (authentication data).

  This authentication data is provided with a recording mode 502 which is data indicating a recording method input by the recording mode providing unit 503 and is stored in the nonvolatile memory 112 under the control of the nonvolatile memory control unit 514.

  In addition, the authentication target data 507 input together with the content before the start of the content reproduction / move is subjected to the hash calculation by the hash calculation unit 504, and the recording mode 502 is given by the recording mode giving unit 503 to control the nonvolatile memory. The coincidence determination unit 511 determines whether the authentication data matches the authentication data 513 acquired from the nonvolatile memory 112 by the unit 514.

  If the match is determined by the match determination unit 511, the authenticated authentication target data 509 is output as the output data 510 from the output control unit 508 as authenticated, and the determination result of the match determination unit 511 is the match determination output 512. Output to other modules.

  As described above, since the recording function 502 is assigned to the authentication data in the authentication function unit 113, the authentication data is the authentication data reflecting the recording mode 502 as the authentication data, and the authentication data when the recording methods are mixed. Even if the attack method is different, the content cannot be played / moved unless the recording method at the time of authentication matches, and playback is allowed only in the recording mode at the time of authentication. It is possible to reliably protect copyrights even against serious attacks.

  Next, the data structure of the nonvolatile memory of the information processing apparatus according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory diagram for explaining the data structure of the nonvolatile memory of the information processing apparatus according to the embodiment of the present invention.

  As shown in FIG. 6, the nonvolatile memory 112 is assumed to include a plurality of blocks and can be overwritten without erasing block units. For example, there is one corresponding to a NOR type flash memory.

  The block structure 602 includes a header and a record. The header has a structure of block state data 603, date / time data 604, and reserve 605.

  The block status data 603 indicates the block status (unused block, used block, invalid block). The unused blocks are all unused records, and the used blocks are used records. An invalid block is a block that contains neither an unused record nor a busy record.

  The date / time data 604 is data indicating the date / time of generation or generation.

  Spare 605 is padding for matching the record length.

  Further, the record has a structure of record status data 606, type data 607, error detection data (CRC) 608, and payload 609.

  The record status data 606 indicates the status of the record (unused record, used record, invalid record). The unused record is a record that is available before use and the used record is data written therein. The valid record and invalid record are records in which data is invalidated.

  The type data 607 indicates the content of the payload included in the record. In FIG. 6, the type data 607 is data indicating that the payload is content authentication data.

  The error detection data 608 is data for checking that the content of the record is correct.

  The payload 609 is a part where a different data structure can be placed for each type, and FIG. 6 shows content authentication data.

  The payload 609 has a structure of a content ID (CID) 610, recording mode data 611, seed data 612, and a content authentication value 613.

  The content ID 610 is an ID for distinguishing recorded content.

  The recording mode data 611 is data for distinguishing a plurality of recording methods, and is characteristic data in the present embodiment. Based on this data, the recording method is distinguished for each content, and playback corresponding to the recorded method is performed. It is possible to prevent an attack on copyright protection by allowing only the method.

  The seed data 612 is a random number used when the content authentication value is calculated, includes a serial number, and guarantees that the same random number does not exist. Even if the same content is recorded with this random number, the authentication value can be made different. As a result, it is possible to make an attack for analyzing the authentication value difficult.

  The content authentication value 613 is a Hash calculation result.

  Next, a recording operation of the information processing apparatus according to the embodiment of the present invention will be described with reference to FIGS. 7 and 8 are PAD (Problem Analysis Diagram) diagrams showing the recording operation of the information processing apparatus according to the embodiment of the present invention. FIG. 7 shows the recording operation by the encryption key seed authentication method, and FIG. The recording operation by the check data authentication method is shown.

  First, as the recording operation by the encryption key seed authentication method, as shown in FIG. 7, the TS mode or the transcoding mode is set, and the recording mode is set (step 701).

  Then, the recording mode is determined (step 702). When the recording mode is the TS mode which is the first recording mode in step 702, the output control unit 105 outputs data to the transcoating system including the transcoding module 101. (Step 706), and in step 702, in the case of the transcoding mode which is the second recording mode, the output control unit 111 prohibits the data output of the TS data to the encryption control unit 121 (step 707).

  Only the data output to the transcoding module 101 or the data output to the cipher control unit 121 of the TS data is enabled by the processing of step 706 and step 707, and the content can be duplicated. Copyright protection is ensured by prohibiting data transfer to parts operating in different recording modes.

  The main loop (step 703) is repeated until the end of recording. In the main loop (step 703), the passage of a fixed time is checked (step 708), and TS / PS data input within the fixed time is used as the same encryption key. The encryption key seed is generated (step 712), the encryption key seed is accumulated (step 713), and the encryption key is generated using the encryption key seed (step 714). Is generated.

  Broadcast TS data is input (step 709), and the recording mode is determined (step 710). If the recording mode is the transcoding mode in step 710, the video / audio decoder A106 converts the video / audio of the broadcast TS data. (Step 715), the decoded video / audio is encoded by the video / audio encoder B103 (step 716), and encrypted with the encryption key generated at step 714 (step 717).

  If the recording mode is the TS mode in step 710, the broadcast TS data is encrypted with the encryption key generated in step 714 (step 718).

  Then, the encrypted data is stored in the mass storage device 116 (step 711).

  When the recording is finished and the main loop (step 703) is finished, authentication data is generated from the generated / accumulated encryption key seed group (step 704), and the authentication data is stored in the nonvolatile memory 112 (step 705). End the recording operation.

  Further, as the recording operation by the tamper check data authentication method, as shown in FIG. 8, the TS mode or the transcoding mode is set, and the recording mode is set (step 801).

  Then, the recording mode is determined (step 802). If the recording mode is the TS mode in step 802, the output control unit 105 prohibits data output to the transcoating system including the transcoding module 101 (step 806). In step 802, in the transcoding mode, the output control unit 111 prohibits data output of the TS data to the encryption control unit 121 (step 807).

  Only the data output to the transcoding module 101 or the data output to the cipher control unit 121 of the TS data is enabled by the processing in step 806 and step 807, and duplication of the content can be duplicated. Copyright protection is ensured by prohibiting data transfer to parts operating in different recording modes.

  The main loop (step 803) is repeated until the end of recording. In the main loop (step 803), broadcast TS data is input (step 808), the recording mode is determined (step 809), and the recording mode is determined in step 809. However, in the transcoding mode, the video / audio of the broadcast TS data is decoded by the video / audio decoder A106 (step 812), and the decoded video / audio is encoded by the video / audio encoder B103 (step 813). Then, encryption is performed with the encryption key in the encryption / decryption unit 403 (step 814).

  If the recording mode is TS mode in step 809, the broadcast TS data is encrypted with the encryption key in the encryption / decryption unit 403 (step 815).

  Then, the elapse of a certain time is checked (step 810), TS / PS data input within a certain time is treated as a block to which the same encryption key is applied, and tampering check data from the data immediately before encryption every time the certain time elapses. (Step 816), and tamper check data is accumulated (step 817).

  Then, the encrypted data is stored in the mass storage device 116 (step 811).

  When the recording is finished and the main loop (step 803) is finished, authentication data is generated from the stored alteration check data group (step 804), and the authentication data is stored in the nonvolatile memory 112 (step 805). End the operation.

  Next, the reproduction operation of the information processing apparatus according to the embodiment of the present invention will be described with reference to FIGS. 9 and 10 are PAD diagrams showing a recording operation of the information processing apparatus according to the embodiment of the present invention. FIG. 9 is a reproduction operation by an encryption key seed authentication method, and FIG. 10 is an authentication method for falsification check data. Shows the playback operation.

  First, as a reproduction operation by the authentication method of the encryption key seed, as shown in FIG. 9, the TS mode or the transcoding mode is set (the same applies to the move) (step 901). Data output to the encryption control unit 121 of TS data is prohibited (step 902).

  Then, the playback mode is determined (step 903), and in the case of TS mode in step 903, the output control unit 105 prohibits data output to the transcoating system including the transcoding module 101 (step 906) and performs different recording. Copyright protection is ensured by prohibiting data transfer to the part operating in the mode.

  Then, content authentication (step 904) is performed. In content authentication (step 904), authentication data is generated from the input encryption key seed group (step 907), and the authentication data is read from the nonvolatile memory 112 (step 908). Then, the match determination unit 511 determines whether the authentication data matches (step 909). If the match is not determined in step 909, the reproduction is rejected and the process is interrupted (step 910).

  After the content authentication in step 904, the main loop (step 905) is repeated until the end of reproduction.

  In the main loop (step 905), the encrypted data is read from the mass storage device 116 (step 911), the encryption key seed corresponding to the encrypted data is obtained from the encryption key seed group (step 912), and the encryption key seed is obtained. An encryption key is generated (step 913).

  Then, the playback mode is determined (step 914). If the mode is TS mode in step 914, the TS data is decrypted with the encryption key generated in step 913 (step 916), and the video / The audio is decoded by the video / audio decoder A106 (step 917).

  In the case of the transcoding mode at step 914, the data is decrypted with the encryption key generated at step 913 (step 918), and the video / audio of the decrypted data is decoded by the video / audio decoder B102 ( Step 919).

  Then, the video / audio decoded in step 917 or step 919 is output (step 915).

  In addition, as shown in FIG. 10, the reproduction operation by the tampering check data authentication method is set to the TS mode or the transcoding mode (the same applies to the move) (step 1001). Data output of the TS data to the encryption control unit 121 is prohibited (step 1002).

  Then, the playback mode is determined (step 1003), and in the case of the TS mode in step 1003, the output control unit 105 prohibits data output to the transcoating system including the transcoding module 101 (step 1006). Copyright protection is ensured by prohibiting data transfer to the part operating in the mode.

  Then, content authentication (step 1004) is performed, and in content authentication (step 1004), authentication data is generated from the input tamper check data group (step 1007), and the authentication data is read from the nonvolatile memory 112 (step 1008). The match determination unit 511 determines whether the authentication data matches (step 1009). If it is not determined to match in step 1009, the reproduction is rejected and the process is interrupted (step 1010).

  After the content authentication in step 1004, the main loop (step 1005) is repeated until the end of reproduction.

  In the main loop (step 1005), the encrypted data is read from the mass storage device 116 (step 1011), the playback mode is determined (step 1012), and in the case of TS mode in step 1012, the encryption / decryption unit 403 The TS data is decrypted with the encryption key (step 1016), and the video / audio decoder A106 decodes the decoded video / audio of the TS data (step 1017).

  In the case of the transcoding mode in step 1012, the data is decrypted with the encryption key in the encryption / decryption unit 403 (step 1018), and the video / audio decoder B102 converts the video / audio of the decrypted data. Decode (step 1019).

  Then, falsification check data corresponding to the decrypted data is acquired from the falsification check data group (step 1013), and the falsification check unit 412 checks the falsification using the falsification check data (step 1014).

  Then, tampering is detected based on the check result in step 1014 (step 1015). If tampering is detected in step 1015, the output of the output control unit 413 is stopped and the process is interrupted (step 1020). If no falsification is detected in 1015, the video / audio decoded in step 1017 or 1019 is output (step 1021).

  As described above, FIG. 9 and FIG. 10 have been described with respect to reproduction, but the same applies to moves.

  As described above, in the present embodiment, by adding the recording mode information to the authentication data at the time of content authentication, even if authentication data different from the recording mode at the time of recording is applied to the content, the reproduction is rejected. Thus, copyright protection can be surely performed.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, as the encryption control unit, a hybrid configuration (method) using the method of FIG. 3 (FIG. 7) in the TS recording method and the method of FIG. 4 (FIG. 8) in the PS recording is possible.

  In this embodiment, the configuration of a set top box (STB) or a configuration using a personal computer has been described. However, the present invention is not limited to this, and a module that performs digital content reception processing and a module that performs transcoding. As long as it is an information processing apparatus that has a computer or a processor and is capable of recording in different recording modes, any apparatus may be used.

  The present invention relates to an information processing apparatus and an information processing method for prohibiting unauthorized tampering and copying in storage of content subject to copyright protection or reproduction, editing, and movement of stored content, in an apparatus having different recording modes. Widely applicable.

It is a block diagram which shows the structure of the information processing apparatus which concerns on one embodiment of this invention. It is a block diagram which shows the structure of the information processing apparatus which concerns on one embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the encryption control part of the information processing apparatus which concerns on one embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the encryption control part of the information processing apparatus which concerns on one embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the authentication function part of the information processing apparatus which concerns on one embodiment of this invention. It is explanatory drawing for demonstrating the data structure of the non-volatile memory of the information processing apparatus which concerns on one embodiment of this invention. It is a PAD figure which shows the video recording operation | movement of the information processing apparatus which concerns on one embodiment of this invention. It is a PAD figure which shows the video recording operation | movement of the information processing apparatus which concerns on one embodiment of this invention. It is a PAD figure which shows the video recording operation | movement of the information processing apparatus which concerns on one embodiment of this invention. It is a PAD figure which shows the video recording operation | movement of the information processing apparatus which concerns on one embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... Transcoding module, 102 ... Video / audio decoder B, 103 ... Video / audio encoder B, 104 ... Information processing apparatus, 105 ... Output control part, 106 ... Video / audio decoder A, 107 ... TS Demux, 108 ... Digital Broadcast antenna 109 ... Digital broadcast tuner 110 ... Digital broadcast receiver module 111 ... Output control unit 112 ... Non-volatile memory 113 ... Authentication function unit 114 ... Internal bus 115 ... Mass storage controller 116 ... Mass storage device, 117 ... Media control unit, 118 ... Media, 119 ... Video / audio output unit, 120 ... Output terminal, 121 ... Encryption control unit, 122 ... Encryption control unit, 201 ... Information processing device, 202 ... Digital Broadcast receiving module, 203 ... speaker, 204 ... bus, 206 ... 209 ... Mass storage device, 210 ... Non-volatile memory, 302 ... Input data, 303 ... Encryption / decryption unit, 304 ... Encryption key generation unit, 305 ... Encryption key seed generation unit, 403... Encryption / decryption unit 405. Tamper check data extraction unit 412. Tamper check unit 413. Match determination unit, 514... Nonvolatile memory control unit.

Claims (10)

An information processing apparatus for processing digital content,
A content receiver that receives the digital content and processes the received digital content in a first recording mode;
A content processing unit that processes the digital content received by the content receiving unit in a second recording mode;
A storage unit for storing content data processed by the content receiving unit and the content processing unit;
At the time of content authentication registration of the content data, mode information for distinguishing the first recording mode or the second recording mode is added to the content authentication data for registration, and the content data stored in the storage unit is reproduced. Or, when moving, an authentication unit that permits the reproduction or movement of the content data when the reproduction mode and the mode information match based on the reproduction mode of the content data or the reproduction mode during the movement and the mode information An information processing apparatus comprising: The information processing apparatus according to claim 1,
The information processing apparatus, wherein the content reception unit, the content processing unit, the storage unit, and the authentication unit are connected by an internal bus in the information processing device. The information processing apparatus according to claim 2,
The information processing apparatus, wherein the authentication unit is provided in the content receiving unit, and stores the content authentication data in a nonvolatile storage unit in the content receiving unit. The information processing apparatus according to claim 3,
The content receiving unit outputs the digital content processed in the first recording mode to the storage unit or the content processing unit based on the mode information when outputting the digital content to the storage unit or the content processing unit. An information processing apparatus having an output control unit that exclusively controls the output. The information processing apparatus according to claim 1,
The information processing apparatus according to claim 1, wherein the first recording mode is a recording mode for digital broadcasting TS data, and the second recording mode is a recording mode for transcoding the digital broadcasting TS data. The information processing apparatus according to claim 1,
The information processing apparatus according to claim 1, wherein the content authentication data is data obtained by hashing data of an encryption key seed group when the digital content is encrypted. The information processing apparatus according to claim 1,
The information processing apparatus according to claim 1, wherein the content authentication data is data obtained by hashing a tamper check data group when performing tamper check of the digital content. An information processing method for processing digital content,
The content receiving unit receives the digital content, and the received digital content is processed in the first recording mode and stored as content data in the storage unit.
The digital content received by the content receiving unit is processed by the content processing unit in the second recording mode and stored as content data in the storage unit,
At the time of content authentication registration of the content data, mode information for distinguishing the first recording mode or the second recording mode is added to the content authentication data for registration, and the content data stored in the storage unit is reproduced. Alternatively, when moving, if the playback mode and the mode information match based on the playback mode of the content data or the playback mode at the time of the move and the mode information, the playback or moving of the content data is permitted. A characteristic information processing method. The information processing method according to claim 8.
When the digital content processed in the first recording mode is output to the storage unit or the content processing unit by the output control unit in the content receiving unit, the storage unit or the content processing is performed based on the mode information. An information processing method characterized by exclusively controlling output to a unit. The information processing method according to claim 8.
The information processing method, wherein the first recording mode is a recording mode for digital broadcasting TS data, and the second recording mode is a recording mode for transcoding the digital broadcasting TS data.

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