International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Comments on a Provably Secure Three-Party Password-Based Authenticated Key Exchange Protocol Using Weil Pairings

Authors:
Hung-Yu Chien
Download:
URL: http://eprint.iacr.org/2006/013
Search ePrint
Search Google
Abstract: In 2005, Wen et al. proposed the first provably secure three-party password-based authenticated key exchange using Weil pairings, and provided their proof in a modified Bellare-Rogaway model (BR-model). Here, we show an impersonation attack on Wen et al.¡¦s scheme and point out a main flaw of their model that allows a man-in-the-middle adversary easily violate the security.
BibTeX
@misc{eprint-2006-21507,
  title={Comments on a Provably Secure Three-Party Password-Based Authenticated Key Exchange Protocol Using Weil Pairings},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols / weil pairing, random oracle, authenticated key exchange},
  url={http://eprint.iacr.org/2006/013},
  note={ redfish6@ms45.hinet.net 13159 received 11 Jan 2006},
  author={Hung-Yu Chien},
  year=2006
}