Information processing apparatus, information recording medium manufacturing apparatus, information recording medium, method, and computer program

• US 8,510,852 B2
• Filed: 09/12/2011
• Issued: 08/13/2013
• Est. Priority Date: 07/15/2005
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takashima, Yoshikazu, Ueda, Kenjiro, Oishi, Tateo, Muramatsu, Katsumi, Yonemitsu, Jun
• Primary Examiner(s): CERVETTI, DAVID GARCIA
• Application Number:
  US13/230,416
• Publication Number:
  US 20110317983A1
• Time in Patent Office: 701 Days
• Field of Search: 726/26, 713/189
• US Class Current: 726/26
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/4753 for user identification, e.g. by entering a PIN or password cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06
• CPC Class Codes: H04N 21/835 Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10
• CPC Class Codes: H04N 21/8352 involving content or source identification data, e.g. Unique Material Identifier [UMID]
• CPC Class Codes: H04N 7/167 Systems rendering the television signal unintelligible and subsequently intelligible

Abstract

To provide an apparatus, a recording medium and a method for effectively preventing unauthorized use of a content. A content containing broken data different from correct content member data is recorded on an information recording medium. Furthermore, transform data, as the correct member data, to be substituted for the broken data, and a fix-up table storing setting position information of the content are recorded on the information recording medium. During the content playback process, the transform data is substituted for the content member data in accordance with the fix-up table recorded on the information recording medium. With this arrangement, even if the encryption key corresponding to the encrypted content recorded on the information recording medium is leaked, an apparatus unable to acquire the transform data cannot play back the content. Unauthorized use of the content is thus controlled.

Claims

1. An information processing apparatus for playing back a content recorded on an information recording medium, comprising:

a data transform processor performing a substitution process on content member data recorded on the information recording medium,

wherein the data transform processor substitutes transform data as substitute data for the content member data in accordance with information stored in a fix-up table,

wherein the data transform processor acquires fix-up tables on the information recording medium, and acquires, from the fix-up tables, the transform data as the substitute data corresponding to a part of the member data of the content, and the recording position information of the transform data, and acquires a reference bit position information which indicates a bit position to be referenced from among a plurality of bits of an identification information identifying a content playback apparatus or a content playback application program,

wherein the data transform determines whether or not to perform a substitution process based on a bit information of a bit position which is indicated by the reference bit position information.

2. The information processing apparatus according to claim 1, wherein the data transform processor performs the substitution process to substitute the transform data composed of authorized content data for broken data different from an authorized content recorded on the information recording medium.

3. The information processing apparatus according to claim 1, wherein the data transform processor performs the substitution process to substitute, for a portion of the content recorded on the information recording medium, the transform data containing data for analyzing member bits of identification information identifying one of a content playback apparatus and a content playback application program.

4. The information processing apparatus according to claim 1, wherein the data transform processor acquires the transform data as the substitute data by performing one of a calculation process and an encryption process, the one of the calculation process and the encryption process applying different parameters to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content.

5. The information processing apparatus according to claim 1, wherein the data transform processor acquires the transform data as the substitute data by performing an exclusive OR gating process with different parameters applied to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content.

6. The information processing apparatus according to claim 5, wherein the data transform processor performs a calculation process of calculating the different parameters as an intermittent process in synchronization with one of a playback process of playing back the content and an output process of outputting the content to the outside, and acquires the transform data corresponding to different content member data through one of the calculation process and the encryption process performed in accordance with the intermittently calculated different parameters.

7. The information processing apparatus according to claim 5, wherein the data transform processor performs the parameter calculation process using a virtual machine.

8. The information processing apparatus according to claim 1, wherein the data transform processor acquires the fix-up table from the information recording medium having the content recorded thereon, and analyzes, based on the fix-up table, the transform data as the substitute data, and the recording position information of the transform data.

9. The information processing apparatus according to claim 1, further comprising a decrypt processor for executing a decryption process on the content recorded on the information recording medium, wherein the data transform processor substitutes the transform data for the content member data of a decrypted content from the decrypt processor.

10. An information recording medium manufacturing apparatus for manufacturing an information recording medium, comprising:

a data processor for generating a content containing broken data different from authorized content member data, a fix-up table holding transform data as the authorized content member data that is to be substituted for the broken data, and a data transform program containing an execution command of executing a substitution process on the content member data with the fix-up table applied, and

a data recorder for recording the content containing the broken data, the fix-up table, and the data transform program onto an information recording medium,

wherein the data transform program further acquires successively divisional fix-up tables distributed in member packets of the content recorded on the information recording medium, and acquiring, from the divisional fix-up tables, the transform data as the substitute data corresponding to a part of the member data of the content, and the recording position information of the transform data, and acquires a reference bit position information which indicates a bit position to be referenced from among a plurality of bits of an identification information identifying a content playback apparatus or a content playback application program,

wherein the data transform program determines whether or not to perform a substitution process based on a bit information of a bit position which is indicated by the reference bit position information.

11. The information recording medium manufacturing apparatus according to claim 10, wherein the data processor generates the fix-up table holding the transform data therewithin selectively applied based on identification information of one of a content playback apparatus and a content playback application program, and

wherein the data recorder records the fix-up table holding the transform data that is selectively applied based on the identification information.

12. The information recording medium manufacturing apparatus according to claim 10, wherein the data processor generates the fix-up table that is obfuscated using one of a calculation process and an encryption process, the one of the calculation process and the encryption process applying different parameters to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content, and

wherein the data recorder records the obfuscated fix-up table.

13. The information recording medium manufacturing apparatus according to claim 12, wherein the data processor generates content data in which the obfuscated fix-up table is dispersed in stream packets of the content containing the broken data, and

wherein the data recorder records the content data containing the obfuscated fix-up table dispersed therewithin.

14. An information processing method of playing back a content recorded on an information recording medium, comprising:

a data transform processing step of performing, by a processor, a substitution process on content member data recorded on the information recording medium,

wherein the data transform processing step includes substituting transform data as substitute data for the content member data in accordance with transform data acquired from a fix-up table,

wherein the data transform processing step comprises acquiring fix-up tables on the information recording medium, and acquiring, from the divisional fix-up tables, the transform data as the substitute data corresponding to a part of the member data of the content, and the recording position information of the transform data, and acquires a reference bit position information which indicates a bit position to be referenced from among a plurality of bits of an identification information identifying a content playback apparatus or a content playback application program,

wherein the data transform processing step determines whether or not to perform a substitution process based on a bit information of a bit position which is indicated by the reference bit position information.

15. The information processing method according to claim 14, wherein the data transform processing step performs the substitution process to substitute the transform data composed of authorized content data for broken data different from an authorized content recorded on the information recording medium.

16. The information processing method according to claim 14, wherein the data transform processing step performs the substitution process to substitute, for a portion of the content recorded on the information recording medium, the transform data containing data for analyzing member bits of identification information identifying one of a content playback apparatus and a content playback application program.

17. The information processing method according to claim 14, wherein the data transform processing step comprises acquiring the transform data as the substitute data by performing one of a calculation process and an encryption process, the one of the calculation process and the encryption process applying different parameters to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content.

18. The information processing method according to claim 14, wherein the data transform processing step comprises acquiring the transform data as the substitute data by performing an exclusive OR gating process with different parameters applied to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content.

19. The information processing method according to claim 18, wherein the data transform processing step comprises performing a calculation process of calculating the different parameters as an intermittent process in synchronization with one of a playback process of playing back the content and an output process of outputting the content to the outside, and acquiring the transform data corresponding to different content member data through one of the calculation process and the encryption process performed in accordance with the intermittently calculated different parameters.

20. The information processing method according to claim 18, wherein the data transform processing step comprises performing the parameter calculation process using a virtual machine.

21. The information processing method according to claim 14, wherein the data transform processing step comprises acquiring the fix-up table from the information recording medium having the content recorded thereon, and analyzing, based on the fix-up table, the transform data as the substitute data, and the recording position information of the transform data.

22. The information processing method according to claim 14, further comprising a decrypt processing step of executing a decryption process on the content recorded on the information recording medium, wherein the data transform processing step comprises substituting the transform data for the content member data of the content decrypted in the decrypt processing step.

23. An information recording medium manufacturing method of manufacturing an information recording medium, comprising:

a data processing step of generating, by a processor, a content containing broken data different from authorized content member data, a fix-up table holding transform data as the authorized content member data that is to be substituted for the broken data, and having setting position information regarding the content of the transform data, and a data transform program containing an execution command of executing a substitution process on the content member data with the fix-up table applied, and

a data recording step of recording, by a recording unit, the content, containing the broken data, the fix-up table, and the data transform program onto an information recording medium,

wherein the data transform program further acquires fix-up tables distributed in member packets of the content recorded on the information recording medium, and acquires, from the fix-up tables, the transform data as the substitute data corresponding to a part of the member data of the content, and the recording position information of the transform data, and acquires a reference bit position information which indicates a bit position to be referenced from among a plurality of bits of an identification information identifying a content playback apparatus or a content playback application program,

wherein the data transform program determines whether or not to perform the substitution process based on a bit information of a bit position which is indicated by the reference bit position information.

24. The method according to claim 23, wherein the data processing step comprises generating the fix-up table holding the transform data therewithin selectively applied based on identification information of one of a content playback apparatus and a content playback application program, and

wherein the data recording step comprises recording the fix-up table holding the transform data that is selectively applied based on the identification information.

25. The information recording medium manufacturing method according to claim 23, wherein the data processing step comprises generating the fix-up table that is obfuscated using one of a calculation process and an encryption process, the one of the calculation process and the encryption process applying different parameters to partial fix-up tables that hold the transform data corresponding to only a part of the member data of the content, and

wherein the data recording step comprises recording the obfuscated fix-up table.

26. The information recording medium manufacturing method according to claim 25, wherein the data processing step comprises generating content data in which the obfuscated fix-up table is dispersed in stream packets of the content containing the broken data, and wherein the data recording step comprises recording the content data containing the obfuscated fix-up table dispersed therewithin.

27. A non-transitory computer readable storage medium comprising:

computer readable and executable instructions that when executed by a processor cause an information processing apparatus to play back a content recorded on an information recording medium, and to execute a data transform processing step of performing a substitution process on content member data recorded on the information recording medium,

wherein the data transform processing step includes substituting transform data as substitute data for the content member data in accordance with information acquired from a fix-up table,

wherein the data transform processing step comprises acquiring fix-up tables distributed in member packets of the content recorded on the information recording medium, and acquiring, from the fix-up tables, the transform data as the substitute data corresponding to a part of the member data of the content, and the recording position information of the transform data, and acquires a reference bit position information which indicates a bit position to be referenced from among a plurality of bits of an identification information identifying a content playback apparatus or a content playback application program,

wherein the data transform processing step determines whether or not to perform the substitution process based on a bit information of a bit position which is indicated by the reference bit position information.