Method for inserting a service key in a terminal and devices for implementing said method

A method for utilizing a service key for retrieving service data transmitted to a terminal from a service center via a communication channel comprising the steps of:

• requesting by a terminal manufacturer a decoding key from a trust center;
• transmitting by the terminal manufacturer a terminal identity number to the trust center when requesting said decoding key;
• assigning by the trust center said terminal identity number to the decoding key and to a coding key used to encrypt a service key;
• transmitting said decoding key to said terminal manufacturer;
• assigning and inputting by a terminal manufacturer the decoding key into the terminal corresponding to the coding key used to encrypt the service key;
• receiving at the service center a service key transmission request containing the terminal identity number transmitted from the terminal;
• requesting by the service center the coding key from the trust center;
• transmitting the terminal identity number from the service center to the trust center when requesting the coding key;
• obtaining the coding key corresponding to the terminal identity number from the trust center;
• using the obtained coding key by the service center to encrypt the service key;
• transmitting the encrypted service key to the terminal;
• and
• decrypting the service key at the terminal using the decoding key and enabling the terminal to decode service data transmitted to it via the communication channel.