一种基于信誉的车载自组网信任管理模型
发布时间：2018-10-17 21:28
【摘要】：车载自组网是一种无中心、自组织、多跳无线通信网络，是移动自组网在智能交通领域的重要应用。作为一种新型的无线通信网络，车载自组网目的在于通过道路中车辆之间的通信或者车辆与基础设施间的通信获取丰富的道路信息，提升驾驶体验和保障车辆行驶安全。 随着车载自组网的研究不断深入，安全问题在车载自组织网络研究的重要性愈发凸显。车载自组网通信主体主要由道路上的大量独立运行的车辆节点和少量路边辅助设施构成。网络中节点能否友好的合作很大程度上决定了网络能否健康、有效的运行。网络中出现的某些恶意节点或者正常节点无意间实施错误的行为，极有可能导致这些节点周围的网络性能急剧下降，甚至影响到整个网络的健康运行。研究发现车载自组网中存在多种潜在的安全威胁，比如自私攻击、女巫攻击、黑洞攻击、共谋攻击等等，严重危害了网络的健康运行。与此同时，车载自组网网络拓扑频繁变化的特性给网络安全问题的解决带来了极大的挑战。目前，移动自组网安全研究已经有了较大的进展，但是很多有关移动自组网的安全解决方案难以在车载自组网独特的网络环境中适用。充分考虑车载自组网本身的特性并建立行之有效的信任管理模型是众多解决安全通信、保障网络健壮性的方案之一。 本文提出一种基于节点信誉的全局信任管理解决方案。本方案通过利用大数定理设计合理的算法对网络中节点的经验信任进行筛选和过滤，保证节点间能够安全的分享经验信任。此外，在对网络中恶意节点判定中，本方案引入动态阈值的概念。信誉管理中心可根据网络中实时的信誉水平，不断调整判定阈值，提高了对恶意节点识别的准确性。分析表明，该方案与现有的信任管理方案相比有着更多的优点：首先，它能够有效地处理陌生节点及新加入节点的信任，从而更快地融入网络。其次，克服了经验信任的主观性缺陷，从一种相对客观的角度维护信任，保障信任的公正性，增强了网络抵抗恶意节点攻击的能力。最后，在网络拓扑变化频繁的环境下，能够充分共享不同节点的信任，，避免了信任资源的浪费，即使在网络稀疏的情况下仍能够正常工作。
[Abstract]:Vehicle ad hoc network is a centerless, self-organized, multi-hop wireless communication network, which is an important application of mobile ad hoc network in the field of intelligent transportation. As a new type of wireless communication network, the purpose of vehicle-borne ad hoc network is to obtain rich road information through the communication between vehicles or between vehicles and infrastructure, to improve the driving experience and to ensure the safety of vehicles. With the development of vehicular ad hoc network, the importance of security is becoming more and more important. The main body of vehicle-mounted ad hoc network is composed of a large number of independent vehicle nodes and a small number of roadside auxiliary facilities. Whether the nodes in the network can cooperate well or not determines whether the network can run healthily and effectively. Some malicious nodes or normal nodes inadvertently implement the wrong behavior in the network, which may lead to a sharp decline in the network performance around these nodes, and even affect the healthy operation of the entire network. It is found that there are many potential security threats in the vehicle Ad Hoc network, such as selfish attack, witch attack, black hole attack, conspiracy attack and so on, which seriously endanger the healthy operation of the network. At the same time, the frequent change of network topology brings great challenges to the solution of network security problems. At present, the research of mobile ad hoc network security has made great progress, but many security solutions related to mobile ad hoc network are difficult to apply in the unique network environment of vehicular ad hoc network. Fully considering the characteristics of the vehicle-mounted ad hoc network and establishing an effective trust management model is one of the many solutions to secure communication and ensure the robustness of the network. This paper presents a global trust management solution based on node reputation. By using the large number theorem to design a reasonable algorithm for filtering and filtering the empirical trust of the nodes in the network, the scheme ensures that the nodes can share the empirical trust safely. In addition, the concept of dynamic threshold is introduced in the decision of malicious nodes in the network. The reputation management center can constantly adjust the judgment threshold according to the real-time reputation level in the network and improve the accuracy of the malicious node identification. The analysis shows that the proposed scheme has more advantages than the existing trust management scheme. Firstly, it can deal with the trust of unfamiliar nodes and newly joined nodes effectively, so as to integrate into the network more quickly. Secondly, it overcomes the subjective defects of empirical trust, maintains trust from a relatively objective angle, guarantees the fairness of trust, and enhances the ability of network to resist malicious node attacks. Finally, in the environment of frequent network topology changes, the trust of different nodes can be fully shared, and the waste of trust resources can be avoided, even if the network is sparse, it can work normally.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.08
本文编号：2278046
[Abstract]:Vehicle ad hoc network is a centerless, self-organized, multi-hop wireless communication network, which is an important application of mobile ad hoc network in the field of intelligent transportation. As a new type of wireless communication network, the purpose of vehicle-borne ad hoc network is to obtain rich road information through the communication between vehicles or between vehicles and infrastructure, to improve the driving experience and to ensure the safety of vehicles. With the development of vehicular ad hoc network, the importance of security is becoming more and more important. The main body of vehicle-mounted ad hoc network is composed of a large number of independent vehicle nodes and a small number of roadside auxiliary facilities. Whether the nodes in the network can cooperate well or not determines whether the network can run healthily and effectively. Some malicious nodes or normal nodes inadvertently implement the wrong behavior in the network, which may lead to a sharp decline in the network performance around these nodes, and even affect the healthy operation of the entire network. It is found that there are many potential security threats in the vehicle Ad Hoc network, such as selfish attack, witch attack, black hole attack, conspiracy attack and so on, which seriously endanger the healthy operation of the network. At the same time, the frequent change of network topology brings great challenges to the solution of network security problems. At present, the research of mobile ad hoc network security has made great progress, but many security solutions related to mobile ad hoc network are difficult to apply in the unique network environment of vehicular ad hoc network. Fully considering the characteristics of the vehicle-mounted ad hoc network and establishing an effective trust management model is one of the many solutions to secure communication and ensure the robustness of the network. This paper presents a global trust management solution based on node reputation. By using the large number theorem to design a reasonable algorithm for filtering and filtering the empirical trust of the nodes in the network, the scheme ensures that the nodes can share the empirical trust safely. In addition, the concept of dynamic threshold is introduced in the decision of malicious nodes in the network. The reputation management center can constantly adjust the judgment threshold according to the real-time reputation level in the network and improve the accuracy of the malicious node identification. The analysis shows that the proposed scheme has more advantages than the existing trust management scheme. Firstly, it can deal with the trust of unfamiliar nodes and newly joined nodes effectively, so as to integrate into the network more quickly. Secondly, it overcomes the subjective defects of empirical trust, maintains trust from a relatively objective angle, guarantees the fairness of trust, and enhances the ability of network to resist malicious node attacks. Finally, in the environment of frequent network topology changes, the trust of different nodes can be fully shared, and the waste of trust resources can be avoided, even if the network is sparse, it can work normally.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.08
【参考文献】
相关期刊论文 前1条
1 常促宇;向勇;史美林;;车载自组网的现状与发展[J];通信学报;2007年11期
本文编号：2278046
本文链接：https://www.wllwen.com/guanlilunwen/ydhl/2278046.html
