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Patent Searching and Data


Title:
DATA REPRODUCING METHOD AND DATA PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/051791
Kind Code:
A1
Abstract:
A recording medium, a data protective method, a data processing method, and a data processing device for protecting the contents so that even if a method for breaking the content protection is found out in consequence of a some accident or incident, the other content cannot be falsely used by the same way. Content data is protected by subjecting it to an altering processing such as XOR operation with a specific value in addition to encryption using a content key, and the bytecode for restoring the data from the altered data is protected by a method different from the content key.

Inventors:
ONODA SENICHI
YAMAMOTO MASAYA
MURASE KAORU
MIYAZAKI MASAYA
Application Number:
PCT/JP2005/020470
Publication Date:
May 18, 2006
Filing Date:
November 08, 2005
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
ONODA SENICHI
YAMAMOTO MASAYA
MURASE KAORU
MIYAZAKI MASAYA
International Classes:
G06F21/24; G09C1/00; G10L19/00; G11B20/10; G11B27/00
Foreign References:
JP2000113452A2000-04-21
JPH09134310A1997-05-20
JP2000029792A2000-01-28
JPS63182758A1988-07-28
JPH03233792A1991-10-17
Attorney, Agent or Firm:
Nakajima, Shiro (2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka 72, JP)
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