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An enhanced verifier-free password authentication scheme for resource-limited environments

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4 Author(s)
Wei-Chi Ku ; Dept. of Comput. & Inf. Sci., Nat. Taichung Univ., Taichung ; Hao-Rung Chung ; Maw-Jinn Tsaur ; Szu-Yao Wang

To realize secure access to multimedia anywhere, anytime, and with any devices, we need efficient authentication mechanisms suitable for resource-limited environments. Password authentication is regarded as one of the most widely used authentication mechanisms for its convenience, easy implementation, and user-friendliness. Up to now, many verifier-free password authentication schemes that can resist stolen-verifier attacks have been proposed, and each has its pros and cons. Recently, Wang et al. showed that two new verifier-free password authentication schemes are vulnerable to an off-line password guessing attack, a forgery attack, and a denial-of-service attack, and then proposed an improved scheme for the real application in resource-limited environments. Unfortunately, we find that Wang et al.'s scheme is still vulnerable to several attacks. Herein, we propose an enhanced verifier-free password authentication scheme for resource-limited environments with better security strength.

Published in:

Communications and Networking in China, 2008. ChinaCom 2008. Third International Conference on

Date of Conference:

25-27 Aug. 2008

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