Enhanced McCullagh-Barreto identity-based key exchange protocols with master key forward security
by H. Guo, Y. Mu, X.Y. Zhang, Z.J. Li
International Journal of Security and Networks (IJSN), Vol. 5, No. 2/3, 2010

Abstract: Master key forward security is an important property for identity-based key exchange protocols. Unfortunately, most of existing identity-based key exchange protocols do not satisfy this property. In this paper, we firstly analyse Xie's modified protocol to show that signature is undesirable for an identity-based key agreement protocol with the master key forward secrecy. Then we present two improved protocols from McCullagh-Barreto identity-based key agreement protocol to capture the master key forward security. Our first protocol is efficient and its security can be proved with the help of a decisional oracle, while the second one achieves stronger security and its security can be reduced to a computational problem in the random oracle model. The master key forward secrecy is proved under the computational Diffie-Hellman assumption.

Online publication date: Wed, 17-Mar-2010

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