A modified remote user authentication scheme using smart cards

  • Authors:
  • Jau-Ji Shen;Chih-Wei Lin;Min-Shiang Hwang

  • Affiliations:
  • Dept. of Inf. Manage., Chaoyang Univ. of Technol., Taichung, Taiwan;-;-

  • Venue:
  • IEEE Transactions on Consumer Electronics
  • Year:
  • 2003

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Abstract

Hwang and Li (see IEEE Trans. Consumer Electron., vol.46, no.1, p.28-30, 2000) proposed a new remote authentication scheme using smart cards. Their scheme is based on the ElGamal's public key cryptosystem. However, Chan and Cheng (see IEEE Trans. Consumer Electron., vol.46, p.992-993, 2000) pointed out that the scheme is vulnerable to the masquerade attack. In this article, we show a different attack on Hwang-Li scheme which is easier and simpler. Furthermore, we present an enhanced scheme for repairing the above attacks.