Flooding Attack in Delay Tolerant Network

Delay Tolerant Network (DTN) routing protocols works in an environment where there is no guarantee of end to end path between source and destination. DTNs operate with the principle of store, carry and forward. Mobile nodes have limited buffer space and contact opportunity. So the resources are useful and must be used optimally. The routing protocol message replication strategies react differently to the increase or decrease of buffer size in different network nodes. Aim of this paper is to study the importance of space constraints on various protocols with respect to message delivery ratio, latency & overhead. The simulation results show how resources are an important factor for enhancing the overall network performance. So we must prevent the network from malicious nodes which by various attacks consume the buffer space of the nodes and thereby hamper the network in terms of various evaluation parameters like message delivery and overhead. We also describe how various types of flooding attacks can be implemented by malicious nodes on different routing protocols which can degrade the network performance. Keywords-Delay Tolerant Networks, Malicious Node, Flooding Attack, Buffer Resource, Bandwidth.