Patent ID: 8397071
Filing Date: 2013-03-12
Classification: H04L,H04W

Abstract:
1. An authorization key generating method of a base station, comprising: obtaining a root key in an authentication procedure with a terminal; generating a base station random value; transmitting a first message including the base station random value to the terminal; receiving a second message including a terminal random value from the terminal; generating an authorization key by using the root key, the base station random value, and the terminal random value; transmitting a third message including a message authentication parameter that is generated by using a message authorization key corresponding to the authorization key to the terminal; generating a temporary authorization key by using the root key and the base station random value; generating a temporary message authentication key based on the temporary authorization key; and generating the message authentication parameter included in the first message by using the temporary message authentication key; wherein the lifetime of the authorization key is shorter than the lifetime of the root key.