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Wireless Communications, Networking and Information Security

A provably secure authenticated key exchange protocol

Lijiang Zhang

Published Jun 1, 2010• 6 citations
Publisher

Abstract

Authenticated key exchange protocol not only allows parities to compute the shared session key but also ensures authenticity of the parties. In this work, we propose an authenticated key exchange protocol CMQV+ which is an improved version of the protocol CMQV. Furthermore, we show that our proposed scheme was provably secure with a tight security reduction under eCK model in random oracle model. Also, the proposed protocol is efficient.

DOI
10.1109/wcins.2010.5541786

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Authenticated key exchange protocol not only allows parities to compute the shared session key but also ensures authenticity of the parties. In this work, we propose an authenticated key exchange protocol CMQV+ which is an improved version of the protocol CMQV. Furthermore, we show that our proposed scheme was provably secure with a tight security reduction under eCK model in random oracle model. Also, the proposed protocol is efficient.
Two-party key exchange protocol is a mechanism in which two parties communicate with each other over an insecure channel and output the same session key.A key exchange protocol that is secure against an active adversary who can control and modify the exchanged messages is called authenticated key exchange (AKE) protocol.LaMacchia, Lauter and Mityagin presented a strong security definition for public key infrastructure (PKI) based two-pass protocol, which we call the extended Canetti-Krawczyk (eCK) security model, and some researchers have provided eCK-secure AKE protocols in recent years.However, almost all protocols are provably secure in the random oracle model or rely on a special implementation technique so-called the NAXOS trick.In this paper, we present a PKI-based two-pass AKE protocol that is secure in the eCK security model.The security of the proposed protocol is proven without random oracles (under three assumptions), and does not rely on implementation techniques such as the NAXOS trick.
Recently,LaMacchia et al.proposed the extended Canetti-Krawczyk(eCK) model,which captures all security properties of authenticated key enchange protocols.Most of existing identity-based authenticated key exchange protocols are not secure in the eCK model.This paper proposes an identity-based authenticated key exchange protocol,and the security of proposed protocol can be proved in the eCK model.When compaer with other schemes,the proposed protocol achieves efficiency in terms of computation and communication.The proposal achieve strong security,and can be proved under the random oracle assumption and the Gap Bilinear Diffie-Hellman assumption.
In this paper, we propose two authenticated key exchange (AKE) protocols and prove their security in the extended Canetti-Krawczyk model. The first protocol, called NAXOS+, is obtained by slightly modifying the NAXOS protocol proposed by LaMacchia, Lauter and Mityagin [15]. We prove its security under the Computational Diffie-Hellman (CDH) assumption by using the trapdoor test introduced in [6]. To the authors' knowledge, this is the first AKE protocol which is secure under the CDH assumption in the eCK model. The second protocol, called NETS, enjoys a simple and tight security reduction compared to existing schemes including HMQV and CMQV without using the Forking Lemma. Since each session of the NETS protocol requires only three exponentiations per party, its efficiency is also comparable to MQV, HMQV and CMQV.
This paper considers the issue on authenticated two-party key agreement protocol over an insecure public network. Many authenticated key agreement protocols have been proposed to meet the challenges. Based on bilinear pairing, Zhou et al. proposed a two-party key agreement with implicit key authentication in 2011. Implicit key authentication can be easily achieved by encrypting the later communications using the session key. However, we can not ensure how participants using the session key protocol. This paper will transform the Zhou's implicit authenticated key agreement protocol into the explicit one with key confirmation by introducing the authenticators, and show the proposed protocol is provably secure under the random-oracle model.
This paper presents an identity-based authenticated key exchange protocol in the standard model.Protocol design isinspired by bilinear pairings.Strand space knowledge and Game method in provable security are comprehensively used.Thecorrectness of the protocol is analysed and a strict proof is given.The protocol has good forward security and session keynon-hosting.At the same time,through the explicit authentication,it improves the efficiency of the implementation of the pro-tocol.Compared with the protocol in the random oracle model,the protocol has the same computational and communicationefficiencies.