Trust-Based LEACH Protocol for Wireless Sensor Networks
Fei Song, Baohua Zhao · 2008
The traditional security solution based on cryptography and authentication is not sufficient for wireless sensor networks, which encounters new challenges from internal attackers, and trust is recognized as a novel approach to defend against such attacks. In this paper, we propose a trust-based LEACH (low energy adaptive clustering hierarchy) protocol to provide secure routing, while preserving the essential functionalities of the original protocol. The decision-making of our scheme is based on the decision trust, evaluated separately and dynamically for different decisions by basic situational trust. The situational trust is maintained by a trust management module integrated with a trust-based routing module, having novel techniques in trust update model and cluster-head-assisted monitoring control. The simulation results demonstrate the effectiveness of our proposed scheme.