A Pairing Free Identity Based Two Party Authenticated Key Agreement Protocol Using Hexadecimal Extended ASCII Elliptic Curve Cryptography

In wireless sensor network (WSN), the secure communication and exchange of confidential information between nodes is a challenging task. To eliminate the security flaws WSN adopts authenticated cryptography mechanisms. The authenticated key agreement protocol guarantees the reality of the users and negotiates the shared session key. In the past years, the two-way authentication scheme has been proved as a better approach for secure and energy efficient communication over Bin and Balls Authentication scheme, Timed Efficient Stream Loss-Tolerant Authentication scheme and so on. However, the recently established identity based protocols are associated with the flaws like inadequate security, high computation cost and latency in communication to a larger extent. The issues related to cost is raised because of the pairing and mapping functionalities in the state-of-the-art techniques. This paper proposes a pairing-free identity based two-party authenticated key agreement protocol based on hexadecimal extended ASCII Elliptic Curve Cryptography. The proposed scheme is developed in an adequate manner with the increased security strength and reduced cost. The security of this protocol is tightened by the extended ASCII code representation of the identity of the user. The performance of this protocol is compared with the Bin and Balls Authentication scheme, Loss-Tolerant Authentication scheme and recently proposed Ramachandran and Shanmugam scheme that show our scheme outperforms these three authentication schemes.