Patent ID: 8473750
Filing Date: 2013-06-25
Classification: G06F,H04N

Abstract:
1. A bridge configured for bridging a central processing unit (CPU) to other components in a system and applying content protection to video content output by the CPU, comprising: a secure bus interface coupling said bridge to said CPU; a security engine; said bridge configured to provide cryptographic services for data access operations performed via said bridge whereby cryptographic services securely specified in a memory coupled to said bridge are selected by said bridge and offloaded from said CPU to said bridge so that transmission and storage of video content within the system is secure; wherein said bridge is configured to encrypt a clear text input received from said CPU as cipher text and write said cipher text to said memory coupled to the bridge by a first insecure bus and to provide said cipher text to a graphics processing unit (GPU) coupled by a second insecure bus to said bridge, said GPU performing decryption of said cipher text.