Method for the dependable transmission of service data to a terminal equipment and arrangement for implementing the method

A method for dependably transmitting service data from a data center to remotely-located terminal equipment, comprising the steps of:

• transmitting unencrypted service data from a data center to terminal equipment;
• generating a code at the terminal equipment based on the transmitted service data;
• transmitting said code from said terminal equipment to said data center;
• and
• receiving said code at said data center and checking said code at said data center and transmitting a message from said data center to said terminal equipment identifying a result of the check.

An arrangement for dependably transmitting service data from a data center to remotely-located terminal equipment, comprising:

• a data center, and terminal equipment located remote from said data center, said data center offering new service data for future use at said terminal equipment;
• means for forming a request for new service data at the terminal equipment;
• means for establishing a first communication between the terminal equipment and the data center and in said first communication transmitting said request data from the terminal equipment to the data center, means for receiving the request data at the data center and for transmitting the new service data requested in the request data from the data center to the terminal equipment, and means for receiving and storing the new service data at the terminal equipment;
• and
• means for establishing a second communication between the terminal equipment and the data center and in said second communication forming a message at the terminal equipment that refers to the new service data stored at the terminal equipment and for communicating said message from the terminal equipment to the data center, means for receiving the message from the terminal equipment at the data center and for checking the message at the data center by comparing information contained in the message with information generated from the new service data at the data center and, given a positive comparison result, for forming and transmitting a follow-up message from the data center to the terminal equipment allowing said terminal equipment, when appropriate, to use said new service data, and means for registering at the data center the valid transmission of the new service data to the terminal equipment.

An arrangement for dependably transmitting service data from a data center to remotely-located terminal equipment, comprising:

• a data center, and terminal equipment located remote from said data center;
• means for transmitting unencrypted service data from the data center to the terminal equipment;
• means for generating a code at the terminal equipment based on the transmitted service data;
• means for transmitting said code from said terminal equipment to said data center;
• and
• means for receiving said code at said data center and for checking said code at said data center and for transmitting a message from said data center to said terminal equipment identifying a result of the check.