Patent ID: 8542837

Claim:
A non-transitory storage medium storing computer readable instructions and a key selection vector for a revocation list in a high-bandwidth digital content protection (HDCP) system, wherein the computer readable instructions are executable by a processor to perform a method comprising: accessing the key selection vector containing at least one bit field with a predetermined number of bits and at a predetermined location in the key selection vector, wherein the bit field contains a first predetermined bit pattern relating to a group property of a device, identifying a plurality of key selection vectors storing same or similar group property information in said at least one bit field, wherein the key selection vector for the revocation list contains at least another bit field containing a second predetermined bit pattern which indicates that the key selection vector identifies said plurality of key selection vectors which are associated with a plurality of different devices, wherein the first predetermined bit pattern is included in a first bit field containing information relating to a first group property of a device and the key selection vector includes a second bit field containing information relating to a second group property of the device, and processing as a group key selection vectors storing same or similar first group property information irrespective of their second group property information.