Date Added: Jul 2010
Mobile Ad hoc NETworks (MANET), nodes usually belong to different authorities and pursue different goals. In order to maximize their own performance, nodes in such networks tend to be selfish and are not willing to forward packets for benefit of others. Meanwhile, some nodes may behave maliciously and try to disrupt the network through wasting other nodes resources in a very large scale. In this paper, the authors present reputation-based attack Resistant Cooperation Stimulation (RACS) system which ensures that damage caused by malicious nodes can be bounded and cooperation among the selfish nodes can be enforced. Mathematical analyses of the system as well as the simulation results have confirmed effectiveness of the proposed system. RACS is completely self-organizing and distributed. It does not require any tamper-proof hardware or central management policy.