Detecting collaborative attacks by malicious nodes in MANET: An improved bait detection scheme

A mobile ad hoc network (MANET) is a self-configuring, infrastructure-less and wireless network of mobile devices. In MANET each device is free to move independently. Each node in MANET acts as both host as well as a router. MANET is simple and flexible hence widely used in military communication, emergency communication and mobile conferencing. But due to dynamic nature and no certification authority, MANETs are more vulnerable to different types of attacks. A primary requirement for the establishment of communication among different nodes in MANET is that, nodes should cooperate with each other. If malicious nodes are present, this requirement may lead to serious security concerns like disrupting routing process, delaying and dropping packets (black hole attack) etc. This paper attempts to resolve this issue by designing an AODV based routing mechanism, which is referred to as Improved bait detection scheme (IBDS) that combines advantages of both proactive and reactive defense architectures. Simulation results are provided showing comparision between the two systems, system without using IBDS and system with IBDS. Simulation results shows that IBDS outperforms as compared to existing systems in terms of Packet delivery ratio, routing overhead and energy consumption.

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