Patent ID: 7870397

Claim:
A method of managing digital rights of a portable storage device, the method comprising: a device performing authentication together with the portable storage device, wherein the authentication comprises generating an encryption key shared by the device and the portable storage device; the device requesting a rights object list from the portable storage device; the device receiving the rights object list from the portable storage device; and the device processing and displaying the rights object list, wherein the rights object list includes a content identifier, information on at least one rights object available at the device among rights objects stored in the portable storage device, a rights object identifier corresponding to the at least one rights object, and permission information corresponding to the at least one rights object, and wherein the permission information includes an Export item, and the Export item has a move mode which makes a rights object deactivated in a digital rights management system when the rights object is transmitted to another digital rights management system and a copy mode which keeps the rights object activated in the digital rights management system.