Intrusion Detection Techniques in MANET: A Review

In today's world, wireless communication has rapid enhancement as demand for wireless network goes on increasing. It is one of the most popular and growing network i.e. Mobile AdHoc Network as no of mobile users are incremented day by day. Mobile AdHoc Network (MANET) is infrastructure-less network i.e. It doesn't require any central (base) station, so it is applicable in various fields for communications such as rescue operations and in critical situations like battlefields .To secure such demanding network is itself a big challenge. Due to some unique characteristics of MANETs like lack of infrastructure and central authority, node mobility and change of dynamic topology, prevention methods alone are not sufficient to make them secure therefore, detection should be added as another defense line before the system could be penetrated. To secure network we have to detect the attacks and take appropriate action on it. This paper reviews the performances of various detection techniques used to detect the malicious/selfish node in the network.