Method and device for upgrading rights object that was stored in memory card

A method for upgrading a rights object installed in a removable media, the method comprising:

• receiving from a Rights Issuer an upgrade trigger including a rights object identifier, upgrade information and an asset identifier, wherein the rights object identifier is related to a rights object to be upgraded, and the asset identifier corresponds to contents associated with the rights object;
• transmitting, to the removable media, a rights information request message including the asset identifier;
• receiving, from the removable media, a rights information message including rights information associated with the asset identifier and an encryption key for the rights information;
• receiving, from the removable media, a first identifier of the rights information;
• checking whether a rights object identifier in the rights information matches the rights object identifier in the trigger message;
• transmitting, to the removable media, an identification message including the first identifier of the rights information and a newly generated second identifier;
• and
• performing a rights upgrade procedure based on the rights information and the encryption key.

A terminal of upgrading a rights object installed in a removable media, comprising:

• a transceiver configured to receive a trigger message including a rights object identifier, upgrade information and AssetID (Asset Identifier) for contents from a Rights Issuer, to transmit the rights object, rights object upgrade information and a signature for upgrade of the rights object, and to receive an upgraded rights object;
• a processor configured to validate whether the rights information matches the rights object identifier, and to generate the rights object based on the rights information and an encryption key for the rights information;
• and
• a connector connected to the removable media, and configured to receive the rights information and the encryption key associated with the AssetID from the removable media, to transmit identifier of the rights object and identifier of the upgraded rights object for installation of the upgraded rights object, and to receive a result of an upgrade of the rights object.