基于AODV的安全路由协议研究

【作者】 戈文燕；

【导师】 张修如；

【作者基本信息】 中南大学 ， 计算机应用技术， 2008， 硕士

【摘要】 近年来,随着无线通信技术快速发展以及Ad Hoc网络技术的应用范围不断拓展,针对Ad Hoc网络路由的研究也日益成熟,AODV路由协议由此孕育而生,然而AODV设计之初并未充分考虑诸多应用在安全方面的要求。因此,建立在AODV的研究基础上,设计出能充分保证路由的安全性和可靠性,同时优化Ad Hoc网络的节点能耗的安全路由协议是值得不断探讨的一个热点问题。论文对AODV协议的安全性以及基于AODV安全性改进的路由协议进行了研究,设计了一种基于AODV的安全路由方案DCAODV。为了有效避免恶意节点利用黑洞和蠕洞针对AODV的路由进行安全攻击,DCAODV协议在AODV协议的机制上增加了对路由回复过程进行验证的功能:采用邻居验证,用于降低验证的复杂度与网络规模的相关性,解决已有协议验证算法涉及节点数目过多的不足;建立在邻居验证基础上的二项分布的概率验证用于进一步检验回复点的可靠性。为了减轻AODV协议在链路中断时完全重建路由的过重负担,DCAODV协议针对路由的重建进行了优化。设计单点断路时,利用断点的上下游节点间的互搜索实现局部的路由重建;多点断路时,参照健壮的AODV路由修复协议采用备份路由来完成重建工作。仿真结果表明DCAODV协议基本可以满足Ad Hoc网络路由安全性方面的要求。更多还原

【Abstract】 In recent years, as the wireless communication technology being rapidly developed and the scope of the application of Ad Hoc continuously expanding.AODV is considered as the best protocol in domain, but the security is not being considered in it.Therefore, how to design a security routing protocol that fully guarantee the security and reliability of routing and optimize the energy consumptions of nodes and based on AODV is a hot topic worthing being continuously discussed.The disseratation was made reseach on the security of AODV protocol and the protocol based on the improving of security of AODV.A security routing protocol ------DCAODV that adopted a double testmechanism based on neighbors cetification and binomial distribution probability recursive verification for the routing lookup process,and optimized the reconstruction of route for the routing maintenance phase. In order to avoid the attacks of unreliable notes,a function that made certification for the replying process in routing lookup process was added to DCAODV.The neighbor verification can reduce the relevance between the complexity of verification and the scale of network. It can decrease the number of nodes in the authentication algorithm in the large-scale networks; The binomial distribution probability recursive based on the neighbors certification can also increase the reliability of replying notes.In order to alleviate the burden of reconstruct routing after route interrupt,DCAOV protocol optimized the routing construction.The simulation result indicated that the DCAODV protocol basicly satisfied the security request of the network route of Ad Hoc.更多还原