A New Improved Secure Password Authentication Protocol to Resist Guessing Attack in Wireless Networks

Wireless communication is widely used today. It transmits information through an open network such that it always suffers by a variety of attacks. In 2006, Yoon et al. proposed a secure password authentication protocol for wireless networks to fix the drawback ofMa et al.' s protocol. In this article, we will show that the Yoon et al.' s protocol is vulnerable to both off-line password guessing attack and replay attack. We will present a new improved protocol to fix the flaw. As shown, the improved protocol is secure while the computation cost is quite low.