Dynamic ID-based Password Authentication Protocol with Strong Security Against Smart Card Lost Attacks


Qi Xie School of Information Science and Engineering,Hangzhou Normal University Hangzhou 310036,China


Seeing that the existing dynamic ID-based password authentication protocols are vulnerable to various attacks, a novel dynamic ID-based password authentication protocol using smart card is proposed. Compared to the existing protocols, the proposed protocol can protect the user’s anonymity, can resist the password guessing attacks and smart card lost attacks. On the other hand, our protocol has many advantages, such as perfect forward security, no verification tables, no server’s public key and timestamp. To the best of my knowledge, this is the first secure dynamic ID-based password authentication protocol.


password authentication protocol, dynamic ID, smart card, anonymity.


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