一种基于效用值的车载网络信任模型  

A Trust Model Based on Utility Values in VANETs

作　　者：张冬雯[1] 张沙沙[1] 张光华[1] 柳晨光[1] 

机构地区：[1]河北科技大学信息科学与工程学院,河北石家庄050018

出　　处：《河北师范大学学报（自然科学版）》2016年第3期200-205,共6页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(61300120);河北省自然科学基金(F2014208169);河北省高等学校科学研究优秀青年基金(YQ2014036)

摘　　要：针对车载网络中因自私节点及恶意节点存在而造成的节点间相互不信任的问题,提出一种基于效用值的车载网络信任模型.在分簇模型下,依照国家的安全认证,把车辆节点划分为5个信任等级,并根据节点的消息成功传输比例及监督比例,得出节点的声誉值.综合车辆信任等级及声誉值的计算,将二者的乘积作为节点的当前效用值,以此选择最佳的下一跳消息收发节点,保证消息的安全传输.基于以上工作,该机制充分利用车载网络的通信方式,根据不同的事件等级来选择不同的通信方式,保证消息快速安全的传输.仿真实验表明,该方法在一定程度上提高了消息的成功传输率,保证了数据的安全.When it comes to the vehicular Ad hoc network（VANET）,there are some trusting issues among nodes because of the presence of selfish and malicious nodes.In order to solve these issues,we propose a vehicle network trust model based on utility values.In the clustering model,the vehicle nodes are divided into five levels of trust by the national safety certification;the reputation value of each node can be calculated according to its successful transmission rate and surveillance.The utility value of each is the product of its value of trust level and its value of reputation.The utility value is used to choose the best next-hop node of message transceiver and ensure the safety of the message transmission.So this new mechanism makes full use of the communication mode in the vehicular Ad hoc network and simulations show that this new model improves the success rate of transmission and ensures the security of data.

关 键 词：车载网络 效用值 声誉模型 信任机制 事件等级 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]