Patent ID: 9026793
Filing Date: 2015-05-05
Classification: G06F

Abstract:
1. A method of receiving, by a terminal, rights from a rights server on behalf of a memory card in the terminal, the method comprising: receiving, by the terminal, a trigger message from the rights server, wherein the trigger message includes a device ID, the device ID indicating a memory card ID; generating, by the terminal, a rights object request message without a signature; sending, from the terminal to the memory card, a signature request message; receiving, by the terminal from the memory card, a signature response message containing a signature of the memory card; sending, by the terminal, the rights object request message including the signature of the memory card to the rights server; receiving, by the terminal and from the rights server, a rights object response message including the device ID, a signature and a protected rights object including a wrapped key material, wherein the wrapped key material within the protected rights object, which is included in the rights object response message received from the rights server, was encrypted by using a key of the memory card, and wherein the wrapped key material which was encrypted by using the key of the memory card includes a message authentication code (MAC) key and a rights object Encryption key (REK); determining whether the device ID in the rights object response message matches a memory card ID inserted in the terminal or not; if the device ID in the rights object response message matches the memory card ID which is different from a terminal ID, extracting, by the terminal, from the protected rights object, information to generate rights information to be stored on the memory card; generating a handle for identifying rights with respect to the rights information to be generated, wherein the handle is a random number and is unique within both the terminal and the memory card; transmitting, from the terminal to the memory card, a provisioning setup request message, including the wrapped key material, the handle and information about a size of the rights information, wherein the memory card checks whether there is a space in the memory card for the rights information upon receiving the provisioning setup request message from the terminal; receiving, by the terminal from the memory card, a provisioning setup response message, the provisioning setup response message including a status indicating a result of processing the provisioning setup request message, and a verification key, wherein the verification key is a message authentication code key, and wherein the verification key was obtained, by the memory card, from the wrapped key material; verifying the rights object using the verification key; transmitting a rights provisioning request message from the terminal to the memory card for installing the rights information in the memory card, the rights provisioning request message including the rights information and the handle, wherein the handle is used to identify rights associated with the rights information stored in the memory card when the rights are to be consumed; and receiving, by the terminal from the memory card, a rights provisioning response message including a rights information installation status, wherein the step of generating a rights object request message without a signature includes generating the rights object request message upon verifying that the device ID of the trigger message matches the ID of the memory card.