【作者】 王娟；

【导师】 侯整风；

【作者基本信息】 合肥工业大学 ， 计算机应用技术， 2009， 硕士

【摘要】 Adhoc网络具有自组织、无中心、动态拓扑等特点,广泛应用于民用、军事、救灾等各个领域。现有的Adhoc安全路由协议,大多运用密码学手段对路由消息进行安全操作,提供路由消息的机密性、完整性和抗否性。然而,密码学手段在保障路由协议安全性的同时,也产生了运算量大、消耗能量多等问题。因此,如何减少安全路由协议的运算量、降低能耗成为Adhoc网络的研究热点。本文介绍了Adhoc路由协议的特点及分类,分析了Adhoc路由协议所面临的攻击行为及相应安全措施,探讨了几种具有代表性的安全路由协议。在此基础上,对SAODV协议运算量大的问题展开讨论,提出了改进的ISAODV协议。ISAODV协议具有如下特点:(1)避免对冗余反向路径的签名验证,减少了协议的运算量。(2)在协议中引入信任链,通过使用信任链避免中间节点传送RREP消息时对源节点的验证。(3)设置临时路由表和信任链路由表,存储不同类型的路由条目,保证协议的安全性。最后,利用网络模拟软件NS2对ISAODV协议和SAODV协议进行仿真实验。实验结果表明,与SAODV协议相比,ISAODV协议具有较低的能量消耗和网络延时。更多还原

【Abstract】 Adhoc network is self-organized,no-centered and has dynamic-topology.It is widely used in civilian,military,disaster relief and other fields.Most of the security routing protocols use cryptography to provide routing message confidentiality,integrity and anti-whether.The cryptography provides routing protocol security,but brings high computational complexity,large energy Consumption and other issues with it.How to reduce the computation and energy consumption of secure routing protocl become the research focus of Adhoc network.In this thesis,Features and categories of Adhoc network routing protocol are introduced at first.Its security problems and appropriate safety measures are analysised.Several types of security routing protocols are discussed.On this basis, SAODV protocol is discussed for the large public-key computation it has.Finally ISAODV protocol is proposed.ISAODV protocol has the following characteristics:(1) Signature verifications for the redundant reverse-path are avoided,so computation of the protocol is reduced.(2)Trust chain in the protocol is used,so the verification for the source-node before intermediate node send RREP is avoided.(3)Temporary routing table and trust chain routing table are established to store the path of different types. It help to ensure the security of the protocol.At last,simulation tests of ISAODV protocol and SAODV protocol are made. The results show that,energy consumption and network latency in ISAODV protocol are lower than in SAODV protocol.更多还原