Patent ID: 7778417

Claim:
A method for managing encrypted content using logical partitions of title keys encrypted with same binding information, the method comprising: partitioning title keys into logical partitions based upon binding contexts that identify a unique set of binding information used to encrypt a set of title keys in a logical partition; requesting access to content on a compliant device stored by a content provider service; identifying a logical partition of which an encrypted title key of the requested content is a member; retrieving a content binding context associated with the identified logical partition; determining if the binding context represents a most current set of binding information for the device based on the binding context associated with the identified logical partition; and if the binding information is outdated: requesting title keys encrypted with outdated binding information be re-encrypted by a content binding service; decrypting the title key using the outdated binding information; re-encrypting the title key with a current set of binding information for a cluster; returning the re-encrypted title key and the current binding context to the content provider; and re-partitioning the re-encrypted title key to a current partition.