Attack and Improvement on the One-Time Password Authentication Protocol Against Theft Attacks
Wen‐Chung Kuo, Yung-Cheng Lee · 2007
Recently, Tsuji and Shimizu proposed a one-time password authentication protocol against replay and theft attacks. Unfortunately, in this paper, we show that their scheme is insecure under the modification attack. We propose an improvement scheme to enhance the security of the one-time password authentication protocol.