Patent ID: 7634816
Filing Date: 2009-12-15
Classification: G06F,H04L

Abstract:
1. A computer-implemented method comprising: receiving an encrypted media file at a computing device, the encrypted media having indicia for a revocation list associated with the encrypted media file but not having the associated revocation list, wherein the indicia indicate whether the associated revocation list is at least as current as revocation list previously loaded in the computing device; receiving an identity of a digital rights management component of the computing device; receiving the associated revocation list, the received revocation list indicating one or more untrustworthy digital rights management components that are not authorized to access the encrypted media; determining, based on the indicia, that the received revocation list is at least as current as the previously loaded revocation list; determining whether the identified digital rights management component is untrustworthy based on the received revocation list when the received revocation list is at least as current as the previously loaded revocation list; and transmitting media from the encrypted media file to the identified digital rights management component when the identified digital rights management component is not untrustworthy.