International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Security Weakness in a Three-Party Password-Based Key Exchange Protocol Using Weil Pairing

Authors:
Junghyun Nam
Seungjoo Kim
Dongho Won
Download:
URL: http://eprint.iacr.org/2005/269
Search ePrint
Search Google
Abstract: Recently, Wen, Lee, and Hwang proposed a three-party password-authenticated key exchange protocol making use of the Weil pairing. The protocol was claimed to be provably secure. But despite the claim of provable security, the protocol is in fact insecure in the presence of an active adversary. We demonstrate this by presenting an attack that completely compromises the authentication mechanism of the protocol. Consequently, the proof of security for the protocol is invalidated.
BibTeX
@misc{eprint-2005-12603,
  title={Security Weakness in a Three-Party Password-Based Key Exchange Protocol Using Weil Pairing},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols / Key exchange protocol, password-based authentication, Weil pairing.},
  url={http://eprint.iacr.org/2005/269},
  note={ jhnam@dosan.skku.ac.kr 13010 received 14 Aug 2005},
  author={Junghyun Nam and Seungjoo Kim and Dongho Won},
  year=2005
}