INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND COMPUTER PROGRAM

• US 20080063194A1
• Filed: 08/20/2007
• Published: 03/13/2008
• Est. Priority Date: 09/09/2006
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takashima, Yoshikazu, Ueda, Kenjiro
• Granted Patent: US 7,983,416 B2
• Time in Patent Office: Days
• US Class Current: 380/200
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00362 the key being obtained from a media key block [MKB]
• CPC Class Codes: G11B 20/00427 advanced access content system [AACS]
• CPC Class Codes: G11B 20/00528 wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
• CPC Class Codes: G11B 20/00847 wherein the usage restriction is defined by a licence file
• CPC Class Codes: G11B 2020/1288 Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
• 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

Abstract

An information processing device that executes processing for outputting recording data to an information recording medium includes a storing unit that stores common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if a medium as a data recording destination is changed, a media-specific-data generating unit that generates media specific data, data content of which is changed according to the medium as the data recording destination, an output-data generating unit that generates output data based on the common data and the media specific data, and a data outputting unit that outputs the data generated by the output-data generating unit.

Claims

1. An information processing device that executes processing for outputting recording data to an information recording medium, the information processing device comprising:

a storing unit that stores common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if a medium as a data recording destination is changed;

a media-specific-data generating unit that generates media specific data, data content of which is changed according to the medium as the data recording destination;

an output-data generating unit that generates output data based on the common data and the media specific data; and

a data outputting unit that outputs the data generated by the output-data generating unit.

2. An information processing device according to claim 1, wherein the media-specific-data generating unit executes processing for inputting a media identifier specific to the medium as the data recording destination and generating media specific data including electronic signature data corresponding to data including the media identifier.

3. An information processing device according to claim 1, wherein the media-specific-data generating unit executes processing for inputting a media identifier specific to the medium as the data recording destination and identification information of a content certificate included in the content management information and generating media specific data including electronic signature data corresponding to data including the media identifier and the content certificate.

4. An information processing device according to claim 1, wherein

the output-data generating unit sets the common data and the medium specific data as different data blocks and generates output data in a unit of the set data blocks, and

the data outputting unit executes processing for outputting the data in a unit of the data blocks.

5. An information processing device according to claim 1, wherein

the output-data generating unit sets data including the common data and obtained by replacing the media specific data with dummy data as first output data and sets the media specific data as second output data to generate two output data, and

the data outputting unit executes processing for outputting the first output data and the second output data.

6. An information processing device according to claim 1, wherein

the output-data generating unit generates common-data-file output data formed by a file or a file package including the common data and media-specific-data-file output data formed by a file or a file package including the media specific data, and

the data outputting unit executes processing for outputting the common-data-file output data and the media-specific-data-file output data.

7. An information processing device that executes processing for recording input data in an information recording medium, the information processing device comprising:

a data inputting unit that inputs common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if a medium as a data recording destination is changed, and media specific data, data content of which is changed according to the medium as the data recording destination; and

a data recording unit that executes processing for recording input data inputted via the data inputting unit in the medium, wherein

the data recording unit executes processing for recording a file system image including the common data and the media specific data in the medium.

8. An information processing device according to claim 7, wherein

the data inputting unit inputs block-identifiable data in which the common data and the media specific data are set in separate data blocks, and

the data recording unit identifies, on the basis of the block-identifiable data, the common data and the media specific data and executes data recording processing.

9. An information processing device according to claim 7, wherein

the data inputting unit inputs first input data including the common data and obtained by replacing the media specific data with dummy data and second input data including the media specific data, and

the data recording unit records the first input data in the medium and, then, overwrites or logically overwrites the second input data on the dummy data of the first input data.

10. An information processing device according to claim 7, wherein

the data inputting unit inputs a common data file formed by a file or a file package including the common data and a media specific data file formed by a file or a file package including the media specific data, and

the data recording unit generates a file system image based on the common data file and the media specific data file and records data in the medium.

11. An information processing method of executing processing for outputting recording data to an information recording medium in an information processing device, the information processing method comprising the steps of:

generating, in a media-specific-data generating unit, media specific data, data content of which is changed according to a medium as a data recording destination;

acquiring, in an output-data generating unit, common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if the medium as the data recording destination is changed, from a storing unit and generating output data based on the common data and the media specific data; and

outputting, in a data outputting unit, the data generated in the output-data generating step.

12. An information processing method according to claim 11, wherein the media-specific-data generating step is a step of executing processing for inputting a media identifier specific to the medium as the data recording destination and generating media specific data including electronic signature data corresponding to data including the media identifier.

13. An information processing method according to claim 11, wherein the media-specific-data generating step is a step of executing processing for inputting a media identifier specific to the medium as the data recording destination and identification information of a content certificate included in the content management information and generating media specific data including electronic signature data corresponding to data including the media identifier and the content certificate.

14. An information processing method according to claim 11, wherein

the output-data generating step is a step of setting the common data and the medium specific data as different data blocks and generating output data in a unit of the set data blocks, and

the data outputting step is a step of executing processing for outputting the data in a unit of the data blocks.

15. An information processing method according to claim 11, wherein

the output-data generating step is a step of setting data including the common data and obtained by replacing the media specific data with dummy data as first output data and setting the media specific data as second output data to generate two output data, and

the data outputting step is a step of executing processing for outputting the first output data and the second output data.

16. An information processing method according to claim 11, wherein

the output-data generating step is a step of generating common-data-file output data formed by a file or a file package including the common data and media-specific-data-file output data formed by a file or a file package including the media specific data, and

the data outputting step is a step of executing processing for outputting the common-data-file output data and the media-specific-data-file output data.

17. An information processing method of executing processing for recording input data in an information recording medium in an information processing device, the information processing method comprising the steps of:

inputting, in a data inputting unit, common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if a medium as a data recording destination is changed, and media specific data, data content of which is changed according to the medium as the data recording destination; and

executing, in a data recording unit, processing for recording input data inputted via the data inputting unit in the medium, wherein

the data recording step is a step of executing processing for recording a file system image including the common data and the media specific data in the medium.

18. An information processing method according to claim 17, wherein

the data inputting step is a step of inputting block-identifiable data in which the common data and the media specific data are set in separate data blocks, and

the data recording step is a step of identifying, on the basis of the block-identifiable data, the common data and the media specific data and executing data recording processing.

19. An information processing method according to claim 17, wherein

the data inputting step is a step of inputting first input data including the common data and obtained by replacing the media specific data with dummy data and second input data including the media specific data, and

the data recording step is a step of recording the first input data in the medium and, then, overwriting or logically overwriting the second input data on the dummy data of the first input data.

20. An information processing method according to claim 17, wherein

the data inputting step is a step of inputting a common data file formed by a file or a file package including the common data and a media specific data file formed by a file or a file package including the media specific data, and

the data recording step is a step of generating a file system image based on the common data file and the media specific data file and recording data in the medium.

21. A computer program for causing an information processing device to execute processing for outputting recording data to an information recording medium, the computer program causing the information processing device to execute:

a media-specific-data generating step of causing a media-specific-data generating unit to generate media specific data, data content of which is changed according to a medium as a data recording destination;

an output-data generating step of causing an output-data generating unit to acquire common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if the medium as the data recording destination is changed, from a storing unit and generate output data based on the common data and the media specific data; and

a data outputting step of causing a data outputting unit to output the data generated in the output-data generating step.

22. A computer program for causing an information processing device to execute processing for recording input data in an information recording medium, the computer program causing the information processing device to execute:

a data inputting step of causing a data inputting unit to input common data that includes encrypted content, key information applied to decoding of the encrypted content, and content management information and, data content of which is unchanged even if a medium as a data recording destination is changed, and media specific data, data content of which is changed according to the medium as the data recording destination; and

a data recording step of causing a data recording unit to execute processing for recording input data inputted via the data inputting unit in the medium, wherein

the data recording step is a step of causing the data recording unit to execute processing for recording a file system image including the common data and the media specific data in the medium.