Cryptanalysis of a flexible remote user authentication scheme using smart cards

Authors:
Wei-Chi Ku;Shuai-Min Chen
Affiliations:
Fu Jen Catholic University, Hsinchuang, Taipei County, Taiwan, R.O.C.;Fu Jen Catholic University, Hsinchuang, Taipei County, Taiwan, R.O.C.
Venue:
ACM SIGOPS Operating Systems Review
Year:
2005

Citing 10
Cited 2

A flexible remote user authentication scheme using smart cards
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Abstract

In 2002, Lee, Hwang, and Yang proposed a verifier-free remote user authentication scheme using smart cards. Their scheme is efficient because of mainly using cryptographic hash functions. However, we find that Lee-Hwang-Yang's scheme is not reparable once the user's permanent secret is compromised and is vulnerable to a privileged insider's attack. Furthermore, it lacks the user eviction mechanism. In this paper, we first show the weaknesses of Lee-Hwang-Yang's scheme, and then compare Lee-Hwang-Yang's scheme with three similar schemes.