Data recording medium, recording medium recording...

Details Data recording medium, recording medium recording... Data recording medium, recording medium recording...

2007-07-03

2007-07-03

Smithers, Matthew (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Tamper resistant

Reexamination Certificate

active

10362402

ABSTRACT:
Optical discs on which enciphered data is recorded include first recording areas, where enciphered contents data is recorded, and second recording areas provided at the position where a read-out operation is carried out ahead of the first recording areas and including a first area portion, where cipher key data for decoding enciphered contents data is recorded, and a second area portion, where identification data for identification of the recording medium modulated by a modulation system different from that of at least the first area portion is recorded.

REFERENCES:
patent: 6081785 (2000-06-01), Oshima et al.
patent: 6141419 (2000-10-01), Gotoh et al.
patent: 2002/0120576 (2002-08-01), Yamada et al.
patent: 2002/0172361 (2002-11-01), Furukawa et al.

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