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Volume :38 Issue : 2 2011      Add To Cart                                                                    Download

Further improvement of Juang et al.'s password-authenticated key agreement scheme using smart cards

Auther : DEBIAO HE, JIANHUA CHEN AND JIN HU

School of Mathematics and Statistics, Wuhan University, Wuhan, Hubei 430072, China
Email: hedebiao@163.com

ABSTRACT
Very recently, Sun et al. proposed an improved password authenticated key agreement scheme based on Juang et al.’s scheme. However, after reviewing their scheme and analyzing its security, we find their scheme is vulnerable to two kinds of attacks, i.e., the offline password guessing attack, and the Denial-of-Service (DoS) attack. The analysis shows that Sun’s scheme is insecure for practical application. Then, we propose a further improved scheme to eliminate the security vulnerability. Compared with Juang et al.’s scheme and Sun et al.’s scheme, our scheme is more secure and more suitable for real-life applications.
Keywords: Authentication; Security; Cryptanalysis; Smart card; Attacks.
 

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