基于RTI的统计分析方法检测与防御虫洞攻击

摘要

移动Ad hoc网是一种新型的无线移动网络,具有无中心、自组织、拓扑结构动态变化以及开放式通信等特性,使得Ad hoc网络易遭受攻击.虫洞攻击是针对Ad hoc路由协议的攻击,对Ad hoc网络造成的威胁最大.提出一种基于RTT(往返时间)的统计分析检测方法,在路由发现过程中,目的节点在返回路由应答(RREP)之前统计并分析获得的路由信息,得到各条链路在所有路由中出现的频率,再结合两两节点间的RTT时间来选择路由.由于在路由过程中就检测出虫洞,因此可以很好地抵御虫洞的攻击.同时,RTT的计算由各个节点自己完成,计算量不大且维持较少的开销.仿真实验表明,该方法能有效地检测出虫洞攻击并提高虫洞的检测率.%Mobile Ad hoc Networks (MANET) is a new networking for wireless hosts.Because of self-organization,dynamic topology and openness of wireless communication, it makes them very attractive to attackers.Wormhole attack is one of the most severe threats to ad hoc networks.They create a higher level virtual tunnel between two malicious colluding nodes in the network.In this paper, we proposed a novel statistical analysis mechanism based on RTT (Round Trip Time) to detect and avoid wormhole attacks.It detected wormhole attacks during route setup procedure by statistically analyzing the route information and the transmission time between every two successive nodes along the established path before sending RREP to the source node.The wormhole will be recognize before it can do harm to the network in the route setup.And each node compute the RTT, it only introduces very limited overhead.Simulation results showed that the method can efficiently detect wormhole attacks and have better detection rote.