METHOD, AND ASSOCIATED APPARATUS, FOR GENERATING SECURITY KEYS IN A COMMUNICATION SYSTEM

摘要

A method (44), and an associated apparatus, is provided for generating a ciphering key used in communications between mobile terminals (12, 14) operable in a GSM cellular, or other communication system (10). When implemented in a GSM cellular communication system (10), SIM-card (34, 36) information is utilized in establishing a secure link between a first and second mobile terminal (12, 14) and a trusted party (26, 28). Public keys are exchanged between the first and second mobile terminal via these links thus generating a secret session key utilized to secure data which is to be transmitted between the mobile terminals (12, 14) during a communication session.