Pushpita Chatterjee
School of Information Technology
Indian Institute of Technology,
Kharagpur, India
ABSTRACT
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. The evidence theory of Dempster-Shafer [7], [8] used in order to combine the evidences collected
by a clusterhead itself and the recommendations from other neighbor nodes. Moreover, in our scheme we
do not restrict to a single gateway node for inter cluster routing.
Keywords:
Ad hoc networks, Trust, Cluster, Security, Distributed Leader Election
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