OTP Authentication Protocol Using Stream Cipher with Clock-Counter

클럭 카운트를 이용한 스트림 암호의 OTP 인증 프로토콜

  • 조상일 (동서대학교 유비쿼터스 IT 학과) ;
  • 이훈재 (동서대학교 컴퓨터정보공학부) ;
  • 이상곤 (동서대학교 컴퓨터정보공학부) ;
  • 임효택 (동서대학교 컴퓨터정보공학부)
  • Published : 2009.10.31


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.


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