Enhancement of two-factor authenticated key exchange protocols in public wireless LANs
In 2008, Juang and Wu proposed two authenticated key exchange protocols by improving Park and Parks two-factor authenticated key exchange protocol in public wireless LANs. They pointed out that Parks protocol was vulnerable to the dictionary attack on the identity protection. The improved protocols requires fewer exchanged messages and provided more secure protection for the clients identity. In this paper, we propose two protocols require less exchanged messages than Juangs protocols. In addition to this advantage, we point out that the identity protection of Juangs protocol is computationally inefficient for the server and efficient identity protection is proposed in the second proposed protocol.
authenticated key exchange identity protection password secure token