An Elliptic Curve based Hierarchical Cluster Key Management in Wireless Sensor Network

Abstract

In wireless sensor networks(WSN), because of the absence of physical protection and unattended deployment, the wireless connec- tions are prone to dierent type of attacks. Hence, security is a measure concern in WSN. Moreover, the limited energy, memory and computa- tion capability of sensor nodes, lead to diculty in implementing secu-rity mechanisms eectively. In this paper we proposed an elliptic curve based hierarchical cluster key management scheme, which is very muchsecure, have better time complexity and consumes reasonable amount of energy. The proposed work uses digital signature scheme and encryption-decryption mechanisms using elliptic curve cryptography(ECC). As it is using ECC, the same level of security can be achieved with smaller keysize compared to other mechanisms. The result shows that the proposed work is faster than Hamed and Khamys work, and it also guards againstdierent type of attacks. Energy consumption, number of messages ex- changed and key storage are three other aspects addressed in this work.