Patent ID: 8161564

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 random value and transmitting the random value to a receiving device; obtaining a repeat indicator from the receiving device, the repeat indicator indicating whether or not the receiving device is capable of transmitting content to a downstream device; generating cipher data, using an advanced encryption standard (AES) cipher block, based at least in part on (a) a session key; (b) at least one constant value obtained from a certificate authority (CA), the at least one constant value comprising a first constant value and a second constant value; (c) the random value; and (d) the repeat indicator; using the cipher data to encrypt data; determining whether the receiving device has been authorized by the CA to receive protected content; and transmitting the encrypted data to the receiving device via a wireless connection only if the receiving device has been authorized by the CA to receive protected content.