Patent ID: 8385890

Claim:
A method of receiving service data at a mobile terminal, the method comprising: sending, to a network, a request message to request particular service data from the network; receiving, from the network prior to receiving of the particular service data, key information to be used for decrypting the particular service data, wherein the receiving of the key information is in response to the sending of the request message, and wherein the receiving of the key information is via a bi-directional communication service; receiving, from the network, the particular service data via a broadcasting service, the particular service data including sequence information assigned by the network, wherein the particular service data has been encrypted using code information; and decrypting the particular service data based upon the received key information, wherein the mobile terminal performs the decrypting only after the mobile terminal has received the key information, and wherein the sequence information is used for detecting duplicate data errors associated with the particular service data.