Solution of Cooperative Black Hole Attack Problem in Mobile Ad-Hoc Network

Priyanka Gupta, Kamna Gauri


Mobile Ad-hoc network is particularly vulnerable due to it’s fundamental characteristics, such as open medium, dynamic topology, distributed cooperation, and constrained capability. It can be established extremely flexibly without any fixed base station in battlefields, military applications, and other emergency and disaster situation. All signals go through bandwidth-constrained wireless links in an ad-hoc network, which makes it more prone to physical security threats than fixed networks. Wireless networks are not secure due to the attacks of malicious nodes. In this paper we are analyzing and improving security in AODV routing protocol in presence of malicious faults by discovering safe route and avoiding these nodes. We also present a technique for ensuring security from coordinated attack that is caused by multiple black holes acting in a group. In this paper we also analyze the impacts of gray holes (nodes which are between good nodes and black hole nodes) on ad-hoc network routing performance.

Keywords: Mobile Ad-hoc network, routing, AODV, black hole, gray hole

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