Patent ID: 8307457

Claim:
A method of receiving, by a terminal, a rights object (RO) from a rights issuing server on behalf of a memory card, the method being initiated by receiving, by the terminal, a trigger message for acquiring the rights object, the method comprising: comparing, by the terminal, a first pair of data items including a trust anchor and an ID of the memory card being included in the trigger message with a second pair of data items including a trust anchor and an ID of the memory card within a Secure Authenticated Channel (SAC) context which was generated by a mutual procedure between the terminal and the memory card; and if a result of the comparison indicates that the first pair of data items are inconsistent with the second pair of data items, identifying, by the terminal, another trust anchor that is included in the trigger message and is also supported by the terminal; performing, by the terminal, a mutual authentication procedure with the memory card, wherein the mutual authentication procedure comprises: transmitting an authentication request message from the terminal to the memory card, wherein the authentication request message includes the another trust anchor, and receiving, by the terminal from the memory card, an authentication response message including information indicating that the another trust anchor is supported by the memory card; transmitting, by the terminal, a RO request message including the ID of the memory to the rights issuing server; and receiving, by the terminal, a RO response message including a protected RO from the rights issuing server.