A Practical Approach for Malicious Activity Detection in MANET

In this Paper, wireless networks, security has been proposed which becomes the prime factor of concern. The mobility of the nodes, in these so called Mobile Ad hoc Networks (MANETS), furthermore leads to a situation where it is very difficult to establish secure data transmission. Since the use of mobile equipments such as cellular phones or laptops is tremendously increasing and because of limited physical security, vulnerability to attacks, including an attack known as the wormhole attack, has become a challenging work. The wormhole attack is very powerful and preventing the attack has proven to be very complex. A strategic placement of the wormhole can result in a significant breakdown in communication across a wireless network. This addresses the aforementioned gap by providing a proper definition and categorization of wormhole attacks against MANET by introducing a new cooperative, clock synchronized technique based on Reference Broadcast System (RBS), and discuss its effect on network performance. To improve network scalability and throughput, the concept of thread for each and every node of MANET is proposed. So that our proposed scheme has two phases namely, route discovery phase of AODV (Ad hoc on demand distance vector protocol) for routing, Principle of Hop count for threshold setting are combined to detect and isolate wormhole attacks in ad hoc networks. That manages how the nodes are going to behave and which to route the packets in secured way.