Secured method for setting up a call connection carrying out a transaction between a terminal and a network

摘要

The method involves transmitting a communication configuration message from a base station (102) of a GSM network (104) to a mobile telephone (101). The telephone processes the message and transmits an encryption activation request to the base station. The base station measures the response time for the configuration message and interrupts the communication with the telephone if the time is greater than a predetermined delay.