期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2008
卷号：8
期号：3
页码：62-66
出版社：International Journal of Computer Science and Network Security
摘要：In 2004, Das et. al proposed a Dynamic ID based remote authentication scheme to authenticate the users while preserving the user’s anonymity .Chein et. al. pointed out that Das et. al scheme fails to protect the user’s anonymity and proposed a new scheme to conquer the weakness in 2005. In this paper, we show that Chein et al scheme is insecure against Insider attack and Man-in-middle attack. An improved scheme is proposed that overcomes the security risk.
