Abstract
Due to user's requirement of wireless connectivity irrespective of his geographical position the dynamic ad hoc networking (DANET) is gaining popularity to its peak today. In mobile ad hoc networks (MANETs), autonomous mobile devices connect with each other forming a temporary network without any centralized administration. The widely accepted ad hoc routing protocols do not address possible security threats at the network layer of MANETs. In this chapter, we investigate Blackhole and Grayhole attacks that cause denial-of-service and badly disrupt normal network functionalities. We present an algorithm that introduces security aspect in the route discovery process of ad hoc On-Demand Distance Vector (AODV) protocol to protect MANETs against these two attacks; a node identifies malicious node by detecting unusual routing information and alerts other nodes about the adversary using default routing packets. The proposed approach detects and isolates multiple malicious nodes during route discovery process to assure safe and secure communication among mobile nodes. We analyse our approach theoretically and evaluate its performance using Network Simulator-2 (NS-2).
Published Version
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