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移动自组织网络中,节点作为一个终端或路由来和网络中其他节点进行通信.黑洞攻击是 MANET 中一种常见的攻击,恶意节通过返回包含到达目标节点的错误最短跳数,从而形成一个只吸收数据包的黑洞.其中,选择性黑洞攻击是一种特殊种类的黑洞攻击,其选择性地丢弃数据包.基于此,在 AODV 协议的基础上提出一种改进的路由协议来检测和防止选择性黑洞攻击,根据目标节点接收包的概率来判断是否启动检测过程,并通过计算任意两节点间的可疑行为概率,来找出源路由中的可疑节点,一旦定位和隔离恶意节点后,所有节点将包含攻击节点的信息从它们的路由缓存中清除.最后通过仿真实验验证了所提技术的有效性.“,”In mobile ad hoc networks, nodes communicate with other nodes in the network as a terminal or path. Black hole attack is a common attack in MANET. The malicious node returns a black hole that absorbs only data packets by returning the shortest number of hops that contain the destination node. Among them, selective black hole attack is a special kind of black hole attack, which selectively discards data packets. Based on this, an improved routing protocol based on AODV protocol is proposed to detect and prevent selective black hole attack, according to the probability of receiving the packet destination node to determine whether to start the detection process, and by calculating the probability of suspicious behavior between any two nodes, to identify suspicious nodes in the source route, once the malicious location and isolation after a node, all nodes will contain the attack node information removed from the routing cache. The validity of the proposed technique is verified by simulation experiment.