Secure Cluster based Data Aggregation in Wireless Sensor Networks

Data aggregation is the best technique for energy conservation in Wireless Sensor Networks (WSN). Because of the open deployment, sensors are vulnerable for security threats. In this paper we address the data aggregation and security issues together. In our approach, we modify our Energy efficient Cluster Based Data Aggregation (ECBDA)[1] scheme to provide secure data transmission. Since, sensors nodes are low powered in nature, it is not viable to apply standard cryptography methods. Cluster head performs data aggregation and Bayesian fusion algorithm to enable security. Trust is the directional relationship between two sensor nodes. By checking the trustworthiness of a node, we can enable secure communication. Bayesian fusion algorithm calculates the trust probability of a sensor based on the behavior of the node. The simulation results show that our approach effectively detects the untrustworthy nodes with minimum energy consumption.