Detection of milicious node in wireless sensor networks

Optimization of Wireless Sensor Network is necessary to reduce redundancy and energy consumption. This paper is mainly focused on TESDA protocol against the compromised nodes that attempt to inject fake data into the data aggregation process. To optimize the data aggregation process in the existence of compromised nodes, the TESDA integrates an energy efficient clustering approach and a trust-based security mechanism. The trust-based security mechanism of TESDA allows the sink and cluster head to estimate a deviation based trust and it diminishes the impact of the compromised sensor node contribution in aggregation performance. By considering the current trust values of sensor nodes in the cluster head election process, the TESDA optimizes the cluster head election performance and also enhances the routing performance By electing a CH based on residual energy, the clustering mechanism of TESDA attains fair energy consumption among nodes within the cluster. Thus, it prolongs the overall network.