Comments on Modified User Friendly Remote Authentication Scheme with Smart Cards

Eun-Jun YOON  Kee-Young YOO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.2   pp.331-333
Publication Date: 2007/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.2.331
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
authentication,  password guessing attack,  smart card,  efficiency,  

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Summary: 
Recently, Wu-Chieu proposed an improvement to their original scheme, in order to make the scheme withstand impersonation attacks. However, the improved scheme is susceptible to an off-line password guessing attack and is inefficiently designed. Accordingly, the current letter demonstrates the vulnerability of Wu-Chieu's modified scheme to an off-line password guessing attack and evaluates the efficiency of their schemes and related schemes.