Hybrid Approach for Detection and Prevention of Blackhole Attack in Mobile Adhoc Network

In this paper, blackhole attack in mobile adhoc networks have been investigated. Blackhole attack is the attack in which all traffic is redirected to a specific node, which may not forward any traffic to all other nodes. The test-bed is created and system is developed using AODV as a base routing protocol on the network simulator. Various network performance parameters i.e. throughput, packet delivery ratio, collisions etc. are analyzed before and after attack. There are two existing mechanisms: packet based prevention, request based prevention and one hybrid mechanism for preventing blackhole attack is proposed. On implementation of blackhole attack the performance of the network reduces, but after implementation of detection and prevention mechanisms the performance of MANETs improves significantly and results shows that proposed hybrid technique is better than existing techniques.