Information recording apparatus, information reproducing...

Details Information recording apparatus, information reproducing... Information recording apparatus, information reproducing...

2008-03-11

2008-03-11

Revak, Christopher (Department: 2131)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C380S201000, C726S030000, C705S058000, C705S059000

Reexamination Certificate

active

07343495

ABSTRACT:
An information recording apparatus comprises an encryption section encrypting contents information and also a license condition referred to to limit use of the contents information and a decoding key for decoding the encrypted contents information to generate license information, and a recording section recording the encrypted contents information and the generated license information on a recording medium. An information reproducing apparatus comprises a decoder unit decoding the license information recorded on the recording medium using a second decoding key for decoding the license information and deciding on the basis of the license condition contained in the decoded license information whether the contents information can be used. If it is decided that the contents information can be used, the encrypted contents information recorded on the recording medium is decoded using the first decoding key contained in the decoded license information.

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