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Journal of Electrical and Computer Engineering
Volume 2013, Article ID 786587, 5 pages
Research Article

An Improved Dynamic ID-Based Remote User Authentication with Key Agreement Scheme

School of Mathematics and Statistics, Chongqing Three Gorges University, Wanzhou, Chongqing 404000, China

Received 8 May 2013; Revised 26 August 2013; Accepted 30 August 2013

Academic Editor: Dharma Agrawal

Copyright © 2013 Juan Qu and Li-min Zou. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In recent years, several dynamic ID-based remote user authentication schemes have been proposed. In 2012, Wen and Li proposed a dynamic ID-based remote user authentication with key agreement scheme. They claimed that their scheme can resist impersonation attack and insider attack and provide anonymity for the users. However, we will show that Wen and Li's scheme cannot withstand insider attack and forward secrecy, does not provide anonymity for the users, and inefficiency for error password login. In this paper, we propose a novel ECC-based remote user authentication scheme which is immune to various known types of attack and is more secure and practical for mobile clients.