In 2004, Yoon et al. proposed a user authentication scheme based on generalized ElGamal signature scheme using smart cards. In their scheme, the previous session keys will be comp...
Abstract. Recently, there are several articles proposed based on Yang and Shieh’s password authentication schemes (YS for short) with the following features: (1) A user can choos...
The purpose of this paper is to realize an authentication system which satisfies four requirements for security, privacy protection, and usability, that is, impersonation resistanc...