Abstract

MANETs are open and cooperative networks and can be formed quickly and without any complex infrastructure. These are very useful characteristics for fast and easy connectivity, however this poses severe security threats. In this paper, we only focus on the security threats posed to most popular MANET routing protocol AODV by black hole and flooding attacks. A Simulation study has been conducted in ns-3.29 to compare the performance of preventive schemes FAP and AMTT in case of flooding and black hole attacks on MANET’s. The performance is analyzed based on throughput, message delay and routing overhead. In trust management security scheme, the trust model has two components: direct observation and indirect observation. In direct observation, trust value is calculated from an observer node to observed node. On the other hand, indirect observation is also referred as secondhand information which is obtained from neighbor nodes of the observer node; the trust value is calculated between them. By combining these two components in the trust model, a more accurate trust value is obtained. This will help to improve throughput and packet delivery ratio in the network.

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