INFORMATION RECORDING MEDIUM, INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND COMPUTER PROGRAM

• US 20100296652A1
• Filed: 05/21/2010
• Published: 11/25/2010
• Est. Priority Date: 03/24/2003
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kuno, Yoshikazu, Nakayama, Tsuyoshi, Mori, Chikako, Kitaya, Yoshimichi
• Granted Patent: US 8,712,048 B2
• Time in Patent Office: Days
• US Class Current: 380/201
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• 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 20/00202 wherein the copy protection scheme builds on multi-session recording, e.g. defective table of contents [TOC] in the 2nd session
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00847 wherein the usage restriction is defined by a licence file
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 9/0836 using tree structure or hierarchical structure

Abstract

There are provided an information recording medium, an information processing apparatus, an information processing method, and a computer program, which can realize users'"'"' convenience for using content in accordance with a license and copyright protection. An information recording medium stores an encrypted content file including encrypted content, usage right information of the encrypted content, and encryption key information necessary for a decrypting process for the encrypted content. Thus, a user can acquire a license (usage right information) and key information necessary for decryption of the content, together with the content, from the information recording medium, without acquiring the license (usage rights) by connection to a license provider. Therefore, it is no longer necessary to perform a process of acquiring the license (usage rights) from the license provider when the content is to be used, whereby user convenience is improved, and license-based content copyright management can also be ensured.

Claims

1. An information recording medium, comprising:

an encrypted multimedia content, and

usage right information,

wherein the usage right information specifies;

a first permitted usage rule in case when an information apparatus into which the information recording medium is inserted is connected to a network; and

a second permitted usage rule in case when the information apparatus is not connected to the network.

2. The information recording medium according to claim 1, further comprising:

a copy-protected multimedia content containing the same multimedia content as the encrypted multimedia content,

wherein the copy-protected multimedia content is capable to be reproduced by the information processing apparatus but is not capable to be copied to a non-volatile storage medium of the information processing apparatus.

3. The information recording medium according to claim 1, further comprising:

address information of a license server,

wherein the address information is used by the information processing apparatus to connect to the license server to obtain a license for the information recording medium.

4. A method for providing an information recording medium with a multi-session configuration, the method comprising:

storing an encrypted multimedia content on the information recording medium, and storing usage right information on the information recording medium, wherein the usage right information specifies;

a first permitted usage rule in case when an information apparatus into which the information recording medium is inserted is connected to a network; and

a second permitted usage rule in case when the information apparatus is not connected to the network.

5. The method according to claim 4, further comprising:

storing a copy-protected multimedia content containing the same multimedia content as the encrypted multimedia content,

wherein the copy-protected multimedia content is capable to be reproduced by the information processing apparatus but is not capable to be copied to a non-volatile storage medium of the information processing apparatus.

6. The method according to claim 4, further comprising:

storing address information of a license server,

wherein the address information is used by the information processing apparatus to connect to the license server to obtain a license for the information recording medium.