ICCSA'12 Proceedings of the 12th international conference on Computational Science and Its Applications - Volume Part III
A Smart Card Based Efficient and Secured Multi-Server Authentication Scheme
Wireless Personal Communications: An International Journal
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In 2007, Hu-Niu-Yang put forward an improved efficient password authenticated key agreement scheme for multi-server architecture based on Chang-Lee's scheme proposed in 2004. This scheme is claimed to be more efficient and is able to overcome a few existing deficiencies in Chang-Lee's scheme. However, we find that this scheme is not as ideal as described by the authors. Specifically, the fulfillment of forward secrecy property is delusively claimed and some potential threats to their scheme have been negligently uncovered in their security analysis. In this paper, we will discuss these issues in depth.