Cryptanalysis and improvement of a DoS-resistant ID-based password authentication scheme without using smart card
by Wenbo Shi; Debiao He; Shuhua Wu
International Journal of Information and Communication Technology (IJICT), Vol. 6, No. 1, 2014

Abstract: An authentication scheme allows the user and the server to authenticate each other and establish a session key for future communication in an open network. Very recently, Wen et al. proposed a DoS-resistant ID-based password authentication scheme without using smart card. They claimed that their scheme could overcome various attacks. However, in this paper, we will point out that Wen et al.'s scheme is vulnerable to an impersonation attack and a privileged insider attack. To overcome weaknesses, we also propose an improved scheme. The analysis shows our scheme not only overcomes weaknesses in Wen et al.'s scheme but also has better performance. Then our scheme is more suitable for practical applications.

Online publication date: Sat, 26-Jul-2014

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