INFORMATION RECORING DEVICE, INFORMATION REPRODUCING DEVICE, INFORMATION RECORING METHOD, INFORMATION REPRODUCING METHOD, AND COMPUTER PROGRAM

Title:

INFORMATION RECORING DEVICE, INFORMATION REPRODUCING DEVICE, INFORMATION RECORING METHOD, INFORMATION REPRODUCING METHOD, AND COMPUTER PROGRAM

Document Type and Number:

WIPO Patent Application WO/2003/017273

Kind Code:

A1

Abstract:

A recording&sol reproducing device that carries out a control for adaptation of content recording&sol reproduction to copyright accurately and efficiently. Input source information on recorded contents is stored as adaptation copyright information on stored contents stored on a record medium. To reproduce a content, the input source information is acquired, and it is judged from the acquired input source information whether reproduction&sol outputting is allowed or not. Correct content reproduction restriction corresponding to output restriction depending on the input source is realized. The key needed to generate a MAC for the copyright information is transmitted together with the enabling key block (EKB) conforming to the key distribution system of a tree structure. Therefore MAC validation of only authorized license device is possible. Consequently, a content having a structure allowing authorized use is realized.

Inventors:

ASANO TOMOYUKI (JP)
NAKAMURA MASANOBU (JP)

Application Number:

PCT/JP2002/007477

Publication Date:

February 27, 2003

Filing Date:

July 24, 2002

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SONY CORP (JP)
ASANO TOMOYUKI (JP)
NAKAMURA MASANOBU (JP)

International Classes:

G06T1/00; G06F21/00; G09C1/00; G09C5/00; G11B20/00; G11B20/10; H04N1/387; H04N5/91; H04N5/913; H04N5/92; (IPC1-7): G11B20/10; H04L9/08; H04N5/91

Domestic Patent References:

WO2000062476A1

2000-10-19

Foreign References:

JPH05327748A	1993-12-10
JP2001036517A	2001-02-09
JPH11308564A	1999-11-05
JP2001125833A	2001-05-11

Other References: