Abstract:

In this paper, a TTPbased twoparty authenticated key exchange (TTPTPAKE) protocol is proposed. It is suitable for largescale clienttoclient communication environments. This protocol can be completed in five steps and four rounds, and communicating entities can authenticate each other and establish a session key through a trusted thirdparty. A formal proof is presented to demonstrate the AKE security of the proposed TTPTPAKE protocol in the ideal cipher model and random oracle model.

Key words: information security;key exchange;passwordbased authentication;provably security