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BioMed Research International
Volume 2013 (2013), Article ID 491289, 9 pages
Research Article

An Improved Biometrics-Based Remote User Authentication Scheme with User Anonymity

1King Saud University, P.O. Box 92144, Riyadh 11653, Saudi Arabia
2Department of Mathematics, Agra College, Agra, Dr. B. R. A. University, Agra, Uttar Pradesh 282002, India

Received 4 August 2013; Accepted 2 September 2013

Academic Editor: Sabah Mohammed

Copyright © 2013 Muhammad Khurram Khan and Saru Kumari. 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.


The authors review the biometrics-based user authentication scheme proposed by An in 2012. The authors show that there exist loopholes in the scheme which are detrimental for its security. Therefore the authors propose an improved scheme eradicating the flaws of An’s scheme. Then a detailed security analysis of the proposed scheme is presented followed by its efficiency comparison. The proposed scheme not only withstands security problems found in An’s scheme but also provides some extra features with mere addition of only two hash operations. The proposed scheme allows user to freely change his password and also provides user anonymity with untraceability.