Countering Flood Attacks and Routing Misbehavior in DTN

摘要

Disruption-tolerant networks are prone to flood attacks in which an attacker floods the network by forwarding as many packets into the network or forwarding replica of packets into network for selfish or malicious purpose. Also selfish or malicious nodes may drop received packets intentionally even when their buffer is not full. Such routing misbehavior reduces the packet delivery ratio and wastes system resources. The proposed approach provides measures to detect flood attack using a method called claim construction. For detecting routing misbehavior, it is required that a node keeps a few signed contact logs of its previous contacts. This signed contact log consists of information of number of packets in node’s buffer before this contact. Based on this contact log, the next contacted node can detect whether this node has dropped any packet.