Patent ID: 8671452
Filing Date: 2014-03-11
Classification: G06F,H04L

Abstract:
1. A method for transferring a rights object (RO) issued by a server between devices via the server comprising: receiving, by a sending device and from the server, a trigger message; checking, by the sending device, the trigger message; generating, by the sending device, a rights object move request message; wherein the rights object move request message includes an identifier of the RO, wherein the rights object move request message selectively includes one or more rights, wherein the selectivity is based on whether or not the server keeps the record of the RO, wherein, according to the selectivity only when the checking step determines that the server does not keep the RO, the rights object move request message includes the one or more rights including at least one or more encrypted keys, and wherein, when the one or more rights are included in the right object move request message, a signature of the server is also included, the signature indicating that the signature was created by the server; sending from the sending device to the server the rights object move request message for requesting a transfer of the RO to a receiving device via the server; receiving a response message from the server with respect to the rights object move request message; and deleting the RO or modifying state information related to the RO.