A Collusion-Resistant Acknowledgement-Based Scheme for Mitigation of Packet Drop in MANETs

MANETs are based on wireless multi-hop communication. To ensure correct operation, nodes need to cooperate and forward messages from other nodes. However there can be misbehaving nodes that can silently drop packets. Such misbehaviors can be either an individual node misbehavior or misbehavior of nodes in collusion. In this paper, a new approach is proposed to identify and mitigate the packet dropping due to individual node misbehavior and collusion. This collusion-resistant acknowledgement-based scheme, called CRACK is introduced based on DSR protocol. Simulation results are presented to estimate the performance of the proposed scheme and compare it with the other methods.