An Enhanced Bait Approach to Defend against Collaborative Attacks in Manets

R.SOMASUNDARAM, DR.P.SIVAKUMAR AND K.SUMITHRA M.Tech Student., Department of Computer Science and Engineering, Manakula Vinayagar Institute of Technology, Pondicherry University, Pondicherry, India. [email protected]. 2 Associate Professor, Department of Information Technology, Manakula Vinayagar Institute of Technology, Pondicherry University, Pondicherry, India. --------------------------------------------------------------------------------------------------------------ABSTRACT The dynamic changing topology of Mobile Ad-hoc Network (MANET) makes a node to join and leave the network at any time. The routes between the nodes in the network are established using routing protocols in MANET. The routing protocols are vulnerable to many kinds of security attacks such as blackhole and grayhole attacks. The Black hole attack is a type of attack where a malicious node advertises itself as if it is having the optimal and shortest route to the destination. To resolve these attack issues a mechanism is proposed which is an Enhanced Bait Detection Approach. The proposed scheme embeds the feature of Dynamic Source Routing (DSR) protocol in Ad-hoc On Demand Distance-Vector Routing (AODV) protocol. The scheme comprises of three steps the bait step, Dubious path detection and the Confirmation request and RREP. The bait approach attracts the malicious node to send a reply and in the next step detects the suspected path. The last step involves the destination requesting its neighbor to confirm if the path given is secure. The work is implemented in Network Simulator. Simulation results for performance metric such as Packet Delivery Fraction, Throughput and Overhead are provided. Index Terms — Blackhole, Bait, DSR, AODV --------------------------------------------------------------------------------------------------------------