Secure video system for display adaptor

Details Secure video system for display adaptor Secure video system for display adaptor

2004-12-06

2009-06-30

Hoffman, Brandon S (Department: 2436)

Cryptography

Video cryptography

Copy protection or prevention

C713S176000

Reexamination Certificate

active

07555124

ABSTRACT:
A secure video system for a graphics display adaptor includes a module for decrypting a content signal from a media player or other secure content source. The adaptor may be provided as a component of a computer graphics system, or in a stand-alone special-purpose device. The adaptor may include other features for preventing unauthorized use of protected content, for example authenticating the source of a content signal before providing an output audio or video signal, encrypting the output video signal, responding to commands to renew or revoke cryptographic keysets, and embedding forensic tracking information in an audio or video signal.

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patent: 2002/0159596 (2002-10-01), Durand et al.
International Search Report and Written Opinion, PCT/US/2004/040863.
English Translation of First Office Action (China); Application No. 200480040081.2, dated Oct. 24, 2008.

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