A Secure and Efficient Chaotic Maps Based Authenticated Key-Exchange Protocol for Smart Grid

Nicanfar and Leung proposed a multilayer consensus elliptic curve based password authenticated key-exchange (MCEPAK) protocol for smart grid. They claimed that their protocol is secure against possible attacks. In this paper, we show that the MCEPAK protocol is vulnerable to the dictionary attack and an adversary can obtain the passwords of the appliances by eavesdropping the communicated messages in the protocol. Moreover, we state that the passwords can be discovered by curious operators of the building area networks and the neighbor area networks. Theses weaknesses motivated us to introduce a chaotic maps based authenticated key exchange protocol for smart grid. To the best of our knowledge, the chaotic maps based key exchange protocol has not yet been devised for smart grid and the same objective has been fulfilled in this paper. In addition, we prove the security of the proposed protocol by a formal analysis.