An Attacking and Improvement on a Remote Dynamic Password Authentication

Password authentication is a hot research field of identity verification, in recent years many authentication protocolbased on password is proposed. This paper analyses the safety of a remote dynamic password authentication protocol, and it is point-ed out that the authentication protocol vulnerabilities cannot resist the impersonation attack and the man in the middle attack. It isimproved in this paper, propose a protocol named SH-Key remote dynamic password authentication. Through the security analysisshows that this protocol can provide a safe, efficient remote dynamic password authentication.