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Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol

Authors:
Chih-I Wang
Chun-I Fan
D. J. Guan
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URL: http://eprint.iacr.org/2005/182
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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.
BibTeX
@misc{eprint-2005-12518,
  title={Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol},
  booktitle={IACR Eprint archive},
  keywords={Authentication, Passwords, Information security, Cryptography},
  url={http://eprint.iacr.org/2005/182},
  note={ wangzy@isl.cse.nsysu.edu.tw 12950 received 16 Jun 2005},
  author={Chih-I Wang and Chun-I Fan and D. J. Guan},
  year=2005
}