A METHOD, SYSTEM AND DEVICE FOR NEGOTIATING ABOUT SAFETY ABILITY WHILE A TERMINAL IS MOVING

摘要

A method for negotiating about safety ability while a terminal is moving is disclosed in the present invention. The method comprises the steps of: receiving a router area updating request of an UE by a target network side entity; acquiring an authority vector associated key derived from the root key, and sending a selected safety algorithm to the UE; deriving the authority vector associated key by the UE from its own root key. A system, SGSN and MME for negotiating about safety ability while a terminal is moving are also provided in the present invention. The present invention is suitable to realize the negotiation of the UE with the network side about safety ability.