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

Title:

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

Document Type and Number:

Japanese Patent JP3931869

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a configuration of an information recording medium storing a number of contents capable of performing use management of each segmented content.
SOLUTION: As a division region of stored contents in the information recording medium, a plurality of content management units are set so as to correspond to the title, index information, and the like. A unit key as a different encryption processing key is correlated to each of the content management units and stored as encryption data to which a unit key corresponding to each content management unit is applied, for content real data contained at least in the content management unit. For reproduction of a content, the unit is identified and decoding is performed by using a unit key corresponding to the unit before reproduction. In an information recording medium containing a number of contents, it is possible to perform use management for each of the segmented contents.

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Inventors:

Yoshikazu Takashima
Tomoyuki Asano
Satoshi Kitani
Muramatsu Katsumi
Jun Yoneman
Kenjiro Ueda

Application Number:

JP2003337665A

Publication Date:

June 20, 2007

Filing Date:

September 29, 2003

Export Citation:

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Assignee:

ソニー株式会社

International Classes:

G06F12/14; G06F12/00; G06F13/00; G06F21/10; G06F21/60; G06F21/62; G11B20/00; G11B20/10; G11B27/00; H04L9/14; H04N7/24; H04N21/2347; H04N21/258; H04N21/426; H04N21/433; H04N21/436; H04N21/4385; H04N21/4405; H04N21/4627; H04N21/6334; H04N21/8355; (IPC1-7): G06F12/14; G06F12/00; G11B20/10; G11B27/00; H04L9/14

Domestic Patent References:

JP2001257670A
JP2003087237A

Other References:

Keiji Horiuchi, Takatoshi Yoshikawa ,The New Method of License Key Management for Content Distribution System -key management for groupin,IEEE International Conference on consumer electronics 2003,2003年 3月20日,p.56-57

Attorney, Agent or Firm:

Masaaki Miyata
Eiji Yamada
Toshio Sawada

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