Trust aware systems in Wireless Sensor Networks

Sensor network is an adaptable technology for perceiving environmental criterions and hence finds its pivotal role in a wide range of applications. The applications range from mission critical like military or patient monitoring systems to home surveillance systems where the network may be prone to security attacks. The network is vulnerable to attack as it may be deployed in hostile environments. In addition it may be exposed to attacks due to the inherent feature of not incorporating security mechanisms into the nodes. Hence additional programs for security may be added in the network. One such scheme is making the network a trust ware system. The trust computation serves as a powerful tool in the detection of unexpected node behaviour. In this paper we propose a trust mechanism to determine the trustworthiness of the sensor node. Most of the existing trust aware systems are centralised and suffer from single head failure. In this paper we propose a dynamic and decentralized system.