Security Analysis of a Nonce-Based User Authentication Scheme Using Smart Cards

Junghyun NAM  Seungjoo KIM  Sangjoon PARK  Dongho WON  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E90-A   No.1   pp.299-302
Publication Date: 2007/01/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e90-a.1.299
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Information Security
Keyword: 
distributed system,  authentication scheme,  password,  smart card,  parallel session attack,  denial of service attack,  

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Summary: 
A remote user authentication scheme is a two-party protocol whereby an authentication server in a distributed system confirms the identity of a remote individual logging on to the server over an untrusted, open network. Recently, Lee et al. have proposed an efficient nonce-based scheme for remote user authentication using smart cards. This work reviews Lee et al.'s authentication scheme and provides a security analysis on the scheme. Our analysis shows that Lee et al.'s scheme does not achieve its basic aim of authenticating remote users and furthermore has a very hazardous method for changing passwords. In addition, we recommend some changes to the scheme so that it can attain at least its main security goal.