Cryptology ePrint Archive: Report 2005/182
Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol
Chih-I Wang, Chun-I Fan, and D. J. Guan
Abstract: Recently, Chang et al. proposed an authenticated key agreement
and protected password change scheme.
They claimed that their scheme is simple and efficient.
However, in this letter we point out that their protected password
change protocol is insecure under the denial-of-service attack and the dictionary attack
in some situations.
Category / Keywords: Authentication, Passwords, Information security, Cryptography
Date: received 16 Jun 2005
Contact author: wangzy at isl cse nsysu edu tw
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Version: 20050622:214439 (All versions of this report)
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