OTP Authentication Protocol Using Stream Cipher with Clock-Counter
Sang-Il Cho, Hoon Jae Lee, Sang-Gon Lee, Hyotaek Lim · The Journal of the Korean Institute of Information and Communication Engineering · 2009
User authentication has been one of the most important part of the network system. OTP(One-Time Password) has been developed and applied to the existing authentication system. OTP makes a different password and abrogates used password each time when user is authenticated by the server. Those systems prevent stolen-key-problems which is caused by using the same key every log-in trial. Yet, OTP still has vulnerabilities. In this paper, an advanced protocol which is using clock-count method to apply a stream cipher algorithm to OTP protocols and to solve problems of existing OTP protocols is proposed.