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

• US 7,487,549 B2
• Filed: 04/10/2003
• Issued: 02/03/2009
• Est. Priority Date: 04/15/2002
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kawamoto, Yoji, Ezura, Yuichi, Nagano, Motohiko, Ishiguro, Ryuji
• Primary Examiner(s): Revak, Christopher A
• Application Number:
  US10/480,626
• Publication Number:
  US 20040210762A1
• Time in Patent Office: 2,126 Days
• Field of Search: 726/30
• US Class Current: 726/27
• CPC Class Codes: G06F 21/1077 Recurrent authorisation
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• 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 20/00152 involving a password
• CPC Class Codes: G11B 20/00181 using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00507 wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
• CPC Class Codes: G11B 20/00731 involving a digital rights management system for enforcing a usage restriction
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/00855 involving a step of exchanging information with a remote server
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 9/0836 using tree structure or hierarchical structure
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying

Abstract

The present invention relates to an information processing apparatus, an information processing method, a recording medium, and a program for importing and exporting a content with information missing controlled. A CPU extracts a sound track contained in the content in step S301, and converts a format of the extracted sound track into a format compatible with a memory stick in step S302. The CPU generates a predetermined file from data contained in the content and excluding the sound track in step S304. In step S306, the CPU attaches reference information of the sound track to the file. In step S307, the CPU controls the writing of the sound track in the converted format and the file to the memory stick. The present invention is applied to clients of a DRM system.

Claims

1. An information processing apparatus for outputting content to a storage medium, comprising:

extracting means for extracting content data contained in the content, the content comprising the content data and separate attribute data for the content data;

converting means for converting a format of the extracted content data into a predetermined format compatible with the storage medium by encrypting the extracted content data with a key specific to the storage medium;

generating means for generating a message authentication code based on conditions of use for the extracted content data;

output means for outputting the extracted content data, the conditions of use for the extracted content data, and the message authentication code to the storage medium;

receiving means for receiving reference information indicating a position of the content data on the storage medium;

generating means for generating a file from the attribute data;

attaching means for attaching the reference information to the file; and

wherein the output means outputs the file to the storage medium.

2. An information processing apparatus according to claim 1, further comprising write control means for controlling the writing of information, concerning a right of use required to use the content, to the storage medium.

3. The information processing apparatus according to claim 1, wherein the attribute data includes a content ID.

4. The information processing apparatus according to claim 1, wherein the attribute data includes a record company ID.

5. The information processing apparatus according to claim 1, wherein the attribute data includes an artist ID.

6. The information processing apparatus according to claim 1, wherein the key specific to the storage medium is received from the storage medium.

7. The information processing apparatus according to claim 1, further comprising calculating means for calculating an integrity check value based on an index containing a pointer to the extracted content data, the conditions of use and the message authentication code.

8. An information processing method for outputting content to a storage medium, comprising:

extracting content data contained in the content, the content comprising the content data and separate attribute data for the content data;

converting a format of the extracted content data into a predetermined format compatible with the storage medium by encrypting the extracted content data with a key specific to the storage medium;

generating a message authentication code based on conditions of use for the extracted content data;

outputting the extracted content data, the conditions of use for the extracted content data, and a message authentication code to the storage medium;

receiving reference information indicating a position of the content data on the storage medium;

generating a file from the attribute data;

attaching the reference information to the file; and

outputting the file to the storage medium.

9. A recording medium storing a computer readable program for causing a computer to perform a method for processing information for outputting content to a storage medium, the method comprising:

extracting content data contained in the content, the content comprising the content data and separate attribute data for the content data;

converting a format of the extracted content data into a predetermined format compatible with the storage medium by encrypting the extracted content data with a key specific to the storage medium;

generating a message authentication code based on conditions of use for the extracted content data;

outputting the extracted content data, the conditions of use for the extracted content data, and the message authentication code to the storage medium;

receiving reference information indicating a position of the content data on the storage medium;

generating a file from the attribute data;

attaching the reference information to the file; and

outputting the file to the storage medium.