An efficient and hybrid key management scheme for three tier wireless sensor networks using LU matrix

Abstract

Security plays a vital role in Wireless Sensor Networks and attention on key part is essential to encrypt the information processing among the sensor nodes in the network. Due to sensor node constraint, Key Management plays an important role. Existing Key Management Schemes (KMS) for Cluster-based architecture either supports Group communication or Node-to-Node communication. The proposed hybrid KMS concentrates on both Group communication and Node-to-Node communication using LU matrix and to enhance the strength of the security between cluster head and base station the ElGamal Public key encryption techniques is used. The main feature of this proposed protocol is 100% Node-to-Node connectivity and perfect resilience is achieved when Sensor node/Cluster Head is compromised. The scheme and its detailed performance analysis are discussed in this paper. © 2011 Springer-Verlag.