A simple scheme for remote dynamic password authentication

Password authentication is the key factor in identity authentication.In the paper,the idea of remote dynamic password authentication are proposed on the basis of analyzing the shortcomings of traditional remote password authentication system,a simple and effective authentication scheme is designed.The digital abstract generated by Hash function (SHA function) which has the oneness property is employed to realize the password dynamic changing for the client logging in a remote server.The scheme can overcome the disadvantages of one time password authentication system( S/KEY),can resist re-transmission attack and is a concise practical approach for identity authentication .