Authors: Abdollah Jabbari Jamshid Bagherzadeh
Publish Date: 2014/06/15
Volume: 78, Issue: 1, Pages: 669-680
Abstract
Very recently Chen et al proposed a securityenhanced key agreement protocol based on Chebyshev chaotic map They claimed that the proposed protocol can achieve session key agreement shared among the server and user with security and users anonymity Although in this paper we will prove that Chen et al’s protocol cannot guarantee security and user anonymity against internal adversary who is a legal user Furthermore we give some improvements to dominate the mentioned shortcomings The analysis shows that our proposed improvements are secure and efficientThe authors would like to express their appreciation to Professor Ali H Nayfeh and the anonymous referees for their valuable comments This research was partially supported by the Iran Telecommunication Research Center ITRC under contract no 500/19246
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