Patent ID: 8527771
Filing Date: 2013-09-03
Classification: H04N

Abstract:
1. A method of managing revocation when an alternate transmission method, using an alternate transmitter identity and an alternate receiver identity, is juxtaposed into an original transmission system, the original transmission system having its own original transmitter and receiver identities that communicate via an original transmission method, the method comprising: at an alternate transmission receiver (ATR), providing a digital certificate, the digital certificate containing information cryptographically binding the ATR identity to an original transmission (OT) re-transmitter identity by hashing the ATR identity with the OT re-transmitter identity; at the ATR, responsive to an initiation of a communication session from an alternate transmission transmitter (ATT), sending the digital certificate to the ATT using the alternate transmission method; at the ATT, extracting the original transmission re-transmitter identity from the digital certificate and sending it to an original transmission transmitter (OTT) using the original transmission method for checking in a revocation list; and when the OT re-transmitter identity is found to be in the revocation list, preventing copy protected content from being sent from the OTT.