Trust based cluster and secure routing scheme for wireless sensor network

In this paper we present a distributed self organizing trust based clustering framework for securing ad hoc networks. The mobile nodes are vulnerable to security attacks, so ensuring the security of the network is essential. To enhance security, it is important to evaluate the trustworthiness of nodes without depending on central authorities. In our proposal the evidence of trustworthiness is captured in an efficient manner and from broader perspectives including direct interactions with neighbors, observing interactions of neighbors and through recommendations. Our prediction scheme uses a trust evaluation algorithm at each node to calculate the direct trust rating normalized as a fuzzy value between zero and one and also trust value is calculate based on throughput of nodes. Moreover, in our scheme we do not restrict to a single gateway node for inter cluster routing.