Password-based authenticated key distribution in the three-party setting with forward security
by Shuhua Wu, Yuefei Zhu
International Journal of Communication Networks and Distributed Systems (IJCNDS), Vol. 3, No. 4, 2009

Abstract: Key establishment protocols are used for distributing shared keying material in a secure manner. In 1995, Bellare and Rogaway presented a three-party server-based key distribution (3PKD) protocol. But the protocol was recently found insecure and then was fixed by Choo et al. (2005b). But forward-secrecy is not considered in the revised protocol. In this paper, we demonstrate that it is not forward secure indeed. We then revise the protocol to be a password-based authenticated key distribution in the three-party setting and prove our protocol is forward secure in the random-oracle and ideal-cipher models under the password-based chosen-basis gap Diffie-Hellman assumption. Our protocol is quite simple and elegant, and rather efficient when compared to previous solutions.

Online publication date: Mon, 03-Aug-2009

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