Patent ID: 7110985

Claim:
A method in combination with a digital rights management (DRM) architecture wherein digital content on a computing device is rendered only in accordance with a corresponding digital license on the computing device, the method for modifying the rendering license on the computing device, the method comprising: receiving a carrier license with a modification string therein at the computing device, the modification string containing modification information for modifying the rendering license and an identifying indicia identifying a source of the digital content; storing the received carrier license in a license store on the computing device; and processing the modification string in the carrier license by storing the modification string in a secure store on the computing device according to the identifying indicia, whereby the modification string may be retrieved from the secure store according to such identifying indicia, wherein the indentifying idicia is a public key of an owner of the content (PU-CS) and wherein the modification string further contains a digital signature based on a priavate key of the owner of the content (PR-CS) corresponding to (PU-CS), the processing of the modification string further comprising verfying based on (PU-CS) that a party other than the content owner did not produce the modification string.