Secured routing protocol for avoiding BlackHole in MANETS

Abstract

An ad hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized administration. This lack of centralised infrastructure in ad hoc network makes it vulnerable to various attacks. The routing process is disrupted if malicious nodes start performing malicious activity instead of the intended function. One among several severe attacks is a BlackHole attack where a malicious node tries to capture the path towards itself by falsely claiming larger sequence number and smaller hop count to the destination and then absorb all data packet without forwarding them to destination node. In this paper, we propose a protocol for avoiding BlackHole attack without the special hardware constraints and dependency on physical medium of wireless network. BRRP modifies AOMDV & uses its link disjoint multi-path during path discovery to provide greater path selection in order to avoid multiple malicious nodes in the path using Reliability table maintained by each node in the network. Thus with the help of Reliability ratio stored in the Reliability table, Non-malicious nodes gradually avoid the BlackHole nodes while making path between source and destination. The proposed protocol will be implemented using NS-2 simulator.