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Lecture notes in computer science

Analysis and Improvement of an Authenticated Key Exchange Protocol

Jiaxin Pan, Libin Wang, Changshe Ma

Published Jan 1, 2011• 3 citations
Publisher
DOI
10.1007/978-3-642-21031-0_31

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IKEv2 can not achieve active identity protection to initiator in initial exchange,and it has the security flaw of authentication failure.So an improvement protocol is presented.In the new protocol,the SIGn-andMAc approach is adopted to realize explicit key authentication and the responder is first authenticated to actively protect the initiator's identity.By including the peer's identity in the sending messages,the new protocol solves the problem of authentication failure.Moreover,the non-repudiation of the peers for their interactions is also achieved.The analysis results show that our protocol is session key secure and has a good performance.
In 2010, Fan et al. proposed a Smart Card-Based Authenticated Key Exchange protocol with CAPTCHAs for wireless mobile networks. In this paper, it is shown that their proposed protocol is vulnerable to Key Compromise Impersonation (KCI) and ephemeral key compromise impersonation attacks while it does not provide the key confirmation attribute. Furthermore, it is inefficient due to number redundancy of rounds and computational costs. To overcome these weaknesses, two secure and efficient smart card-based Authenticated Key Exchange (AKE) protocols combined with CAPTCHAs are proposed for wireless mobile networks that provide many security attributes while they have a remarkable efficiency when compared with Fan et al.'s protocol in the terms of communication costs and computational complexities.