METHOD FOR AUTHENTICATION AND KEY ESTABLISHMENT WITH FORWARD SECRECY IN WIRELESS COMMUNICATION SYSTEM

摘要

PURPOSE: A certification and key setting method in a wireless communication system providing forward privacy is provided to provide forward privacy assuring the privacy of a temporary secret key set on a protocol even if a permanent secret key is exposed in a wireless communication system. CONSTITUTION: A terminal receives network public key certification(BCert) broadcasted on a network and a network certification authority identifier(CA_B) in 201. The terminal decides whether a new position is registered on the network and thus certification is being performed in 202. The terminal generates a random number(rA) and encodes the random number(rA) generated from the terminal by a network publick key(BPubKey) in 203. The terminal generates a temporary public key(APubKeyX) in 204. Message 1 is sent to the network in 205. The terminal receives message 2 in 206. A temporary secret key(SessKeyAB) is generated by using random number(rB) generated from the network the temporary public key(APubKeyX) generated from the terminal in 207.