Patent ID: 8336109

Claim:
A method for upgrading a Rights Object (RO), comprising: receiving, by a Digital Rights Management (DRM) Agent of a terminal device, an ROUpgradeTrigger message, the ROUpgradeTrigger message comprising an identifier of the RO that requires updating; instructing, by the DRM Agent, a Secure Removable Media (SRM) Agent of a SRM to set the RO to an unavailable status; acquiring, by the DRM Agent, an ExistProof indicating that the RO that requires updating actually exists in the SRM from the SRM agent, wherein the Existproof includes the identifier of the RO and a digital signature; providing, by the DRM Agent, said RO related information to a Rights Issuer (RI), and obtaining, by the DRM Agent, a new RO from the RI; and interacting, by the DRM Agent, with the SRM Agent to upgrade the RO that requires updating on the SRM by means of the new RO so as to install the new RO to the SRM through the SRM Agent.