| Summary: | A mobile ad-hoc network (MANET) is an ordinary and self-orbiting communication network that is capable of managingmobile nodes. Many proposed protocols on MANET address its vulnerability against different threats and attacks. Themalicious node exploits these vulnerabilities to lunch attacks, especially when nodes have mobility and network do not haveconstant topology, like wormhole attack. This paper presents a lightweight technique that detects the wormhole attacks inMANET. In the proposed technique, the source node calculates the average sequence number of the reply (RREP) packets.If the sequence number of the corresponding node exceeds the calculated average value of the sequence number, then alltraffic is discarded, and the node is marked as malicious. The proposed technique is less complex, power-efficient, andenhances network lifetime as more data packets are delivered to the destination node. This technique is validated throughcomprehensive simulations results in NS2.
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