Contents recorder/reproducer

Details Contents recorder/reproducer Contents recorder/reproducer

2007-06-26

2007-06-26

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C726S027000, C726S030000, C726S032000, C726S033000, C380S044000, C380S045000, C380S203000, C380S277000

Reexamination Certificate

active

10341421

ABSTRACT:
A unidirectional function circuit generates a first encryption key according to the device identification information stored in a device identification information holding unit. Another unidirectional function circuit generates a second encryption key that depends on a write block address. A contents key generator generates a contents key using the first encryption key, second encryption key, and relation information. An encryptor records contents, which are encrypted using the contents key, onto a HDD.

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patent: 6516064 (2003-02-01), Osawa et al.
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patent: 08-335182 (1996-12-01), None
patent: 2001-184787 (2001-07-01), None
patent: 00/67130 (2000-11-01), None
Ripe, et al, ‘Digital rights Management’, Wikipedia, Apr. 1, 2007, revision of ‘DRM and audio CDs’, entire document, http://en.wikipedia.org/wiki/Digital—Rights—Management.

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