A Secure Communication Model for Defending Against Insider Packet Dropping Attacks
Zhang Zhong · Chinese Journal of Computers · 2010
In wireless ad hoc networks,packets are delivered by multi-hop relay among nodes.When some nodes are captured,they turn out to be inside attackers,then drop data packets arbitrarily.Such kind of attack,called packet dropping attack,will dramatically degrade network performance.However,neither transport layer nor network layer protocols of existing network protocol stacks are able to defend against it efficiently.Hence,this paper presents a new secure communication model defending against packet dropping attack from inside attacker in the network layer,including Real-time Link Status Analysis protocol(RLSA)and Distributed Node Classification algorithm(DNC).RLSA took advantage of segment-based multiple paths between a pair of source and destination,as well as group acknowledgement mechanism for packets,to obtain packet forwarding status of neighbors in real time.Based on RLSA and related analytical model,DNC identifies abnormal behavior of nodes,and then classifies nodes into normal and malicious types.Simulation results show the secure communication model performs well regarding malicious node detection rate and false alarm rate.