1. Password authentication with insecure communication;Lamport;Communications of the ACM,1981
2. A password authentication method for contents communications on the Internet;Shimizu;IEICE Transactions on Communications,1998
3. A secure one-time password authentication scheme using smart cards;Yeh;IEICE Transactions on Communications,2002
4. A flexible remote user authentication scheme using smart cards;Lee;ACM Operating Systems Review,2002
5. A remote user authentication scheme using hash functions;Lee;ACM Operating Systems Review,2002