| 摘要 |
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 video signal, encrypting the output video signal, responding to commands to renew or revoke cryptographic keysets, and embedding forensic tracking information in a video signal.
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