Patent ID: 8171565

Claim:
A system for locally generating a license and activating a Digital Rights Management (DRM) agent, comprising: a storage device comprising a DRM treated file, operation information, and a management application; and an electronic device connected to the storage device, wherein the electronic device configured to activate the management application from the storage device to retrieve information of the electronic device, generate a license for the electronic device according to the operation information and the retrieved information of the electronic device, and activate a DRM agent by providing the DRM treated file and the license to the DRM agent for playing back the DRM treated file based on the license, wherein the management application sets the license to become expired after the DRM treated file is played back on the electronic device, and wherein the operation information comprises information which is necessary to authorize the license for the DRM treated file and the electronic device, and the information comprises data and algorithm in order to derive a decryption key from the information contained in the DRM treated file and the information retrieved from the electronic device.