Patent ID: 8155321

Claim:
A processing system to serve as a source device for protected digital content, the processing system comprising: a processor; and control logic which, when used by the processor, results in the processing system performing operations comprising: generating a first master key; transmitting the first master key to a first receiving device for use during a first session; saving the first master key; obtaining an identifier for a candidate receiving device during a second session, wherein the candidate receiving device may or may not be the first receiving device; using the identifier to determine whether the processing system contains a master key for the candidate receiving device; in response to a determination that the processing system contains the master key for the candidate receiving device, (a) sending verification data concerning that master key to the candidate receiving device and (b) using that master key to encrypt a session key for the second session; and in response to a determination that the processing system does not contain the master key for the candidate receiving device, (a) generating a second master key and (b) transmitting the second master key to the candidate receiving device for use during the second session.