Cryptanalysis of a User Authentication Protocol
نویسنده
چکیده
Recently, Peyravin and Jeffries proposed a password-based practical authentication scheme using oneway collision-resistant hash functions. However, Shim and Munilla independently showed that the scheme is vulnerable to off-line guessing attacks. Hölbl, Welzer and Brumenn presented an improved password-based protocols. In the paper, we showed that the improved scheme still suffers from off-line guessing attacks on user authentication protocol and Denial-of-Service attacks on password change
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تاریخ انتشار 2009