Management of authentication keys in a mobile communication system

A mobile communication system, comprising authentication key authentication body (102), base station and mobile station comprises at least one, and mobile station and base station, and user distinguishing module (101), SIM) and a coupled to the mobile battery. The mobile communication system comprises a identifier generation device, and generating corresponding to the identifier of authentication key authentication the lower; the authentication method, capable (102) find the authentication key in authentication centre through the identifier.