Binary Information Press
Key agreement mechanisms provide users to establish a session key for secure communications over networks. One of the most important security services of key agreement is user authentication. Password authentication schemes are the simplest and most convenient authentication mechanisms in network environment to protect unauthorized access. Recently, the researcher proposed a three-party key agreement protocol. In this paper, the authors show that Bijayasingh et al.'s protocol cannot withstand guessing attack, that is, an adversary can obtain password with the intercepted messages.