DETECTION AND RECTIFYING VARIOUS ATTACKS IN MULTIHOP NETWORKS

Electronics and Communication Engineering

Stealthy attacks were considered as a kind of dangerous attack because a small number of malicious parties can easily ruin the entire network performance. The most possible attacks were misrouting, power control, identity delegation, colluding collision, data modification and denial of service. Stealthy packet dropping disrupts the packet from reaching the destination through malicious behavior at an intermediate node. The malicious node gives the impression to its neighbors that it performs the legitimate forwarding action. Moreover, a legitimate node comes under suspicion. A popular method for detecting attacks in wireless networks is behaviour based detection performed by normal network nodes through overhearing the communication in their neighborhood. this project provides a protocol namely MAAM to detect and isolate stealthy packet dropping attack efficiently .it performs effectively because by maintaining extra neighbours in the monitoring process and accurately identifies the malicious user. MAAM presents two techniques that can be overlaid on basic local monitoring: having the neighbors maintain additional information about the routing path, and adding some checking responsibility to each neighbor. Additionally, MAAM provides an innovative mechanism to better utilize local monitoring by considerably increasing the number of nodes in a neighborhood that can do monitoring. We show through analysis and simulation experiments that basic local monitoring fails to efficiently mitigate most of the presented attacks while MAAM successfully mitigates them.

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