一种解决ad hoc网络中自私节点安全问题的方法

One Method for Selfish nodes Security Problem in Ad Hoc Networks

移动ad hoc网络（MANET）路由和分组转发功能需要节点间的相互合作，自私节点为节约能量而不参与合作，将会影响网络的正常工作．因此本文将针对自私节点危害和解决方法展开分析，并提出一种改进解决方法——基于可信任中心服务器和邻居监测的合作增强机制，该方法不但能够激励节点间的相互合作，而且有效地解决了自私节点改变用户身份的欺骗攻击．最后，仿真结果表明这种合作增强机制对自私节点安全问题是有效的，并且易于实用化．

Mobile ad hoc networks （MANET） works properly only if the participating nodes cooperate in routing and forwarding, However, for saving battery life for its own communications, the selfish node simply does not cooperate in network operation. So in this paper, we analyze the harm of selfish nodes and its solution, and provide an improved method, which is based on trusted center server and neighbor monitor cooperative enhancing. This method not only may encourage the nodes cooperating with each other, but also may solve the spoofing attacks caused by selfish nodes changing their identities. Finally, the simulation results conclude that this cooperation enhancing method is effective to solve the selfish nodes security problem, and it is easy to be implemented.