Information processing device, method, and program

Details Information processing device, method, and program Information processing device, method, and program

2008-01-29

2008-01-29

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S176000, C713S168000

Reexamination Certificate

active

07325139

ABSTRACT:
The present invention relates to an information processing apparatus and method and to a program for reliably preventing unauthorized use of content even in the case of a low-throughput content storage device. A CPU selects content to be stored on a content storage device. In step S202, the CPU verifies a first digital signature added to the content. A storage unit stores a usage right. In step S203, the CPU searches the storage unit for the usage right. In step S207, the CPU verifies a second digital signature added to the usage right. The CPU generates alteration detecting data on the basis of information included in the usage right. In step S208, when the content and the usage right are unaltered, the CPU outputs the usage right, the alteration detecting data, and the content to the content storage device. The present invention is applicable to clients in a DRM system.

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