Breaking an improved password authenticated key exchange protocol for imbalanced wireless networks

  title={Breaking an improved password authenticated key exchange protocol for imbalanced wireless networks},
  author={Muxiang Zhang},
  journal={IEEE Communications Letters},
Yeh et al. (2003) proposed a password-authenticated key exchange protocol which is claimed to be an improvement of Zhu et al.'s (2002) password-authenticated key exchange protocol to defend against the so-called undetectable on-line password guessing attack. In this paper, we show that the improved protocol of Yeh et al. is insecure. In fact, an adversary can recover the password, off-line, by executing a single run of the improved protocol. We also point out the misconception of the so-called… CONTINUE READING


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