International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Dah-Jyh Guan

Publications

Year
Venue
Title
2005
PKC
2005
EPRINT
Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol
Chih-I Wang Chun-I Fan D. J. Guan
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.

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