一種基于信譽的車載自組網(wǎng)信任管理模型
發(fā)布時間：2018-10-17 21:28
【摘要】：車載自組網(wǎng)是一種無中心、自組織、多跳無線通信網(wǎng)絡，是移動自組網(wǎng)在智能交通領域的重要應用。作為一種新型的無線通信網(wǎng)絡，車載自組網(wǎng)目的在于通過道路中車輛之間的通信或者車輛與基礎設施間的通信獲取豐富的道路信息，提升駕駛體驗和保障車輛行駛安全。 隨著車載自組網(wǎng)的研究不斷深入，安全問題在車載自組織網(wǎng)絡研究的重要性愈發(fā)凸顯。車載自組網(wǎng)通信主體主要由道路上的大量獨立運行的車輛節(jié)點和少量路邊輔助設施構成。網(wǎng)絡中節(jié)點能否友好的合作很大程度上決定了網(wǎng)絡能否健康、有效的運行。網(wǎng)絡中出現(xiàn)的某些惡意節(jié)點或者正常節(jié)點無意間實施錯誤的行為，極有可能導致這些節(jié)點周圍的網(wǎng)絡性能急劇下降，甚至影響到整個網(wǎng)絡的健康運行。研究發(fā)現(xiàn)車載自組網(wǎng)中存在多種潛在的安全威脅，比如自私攻擊、女巫攻擊、黑洞攻擊、共謀攻擊等等，嚴重危害了網(wǎng)絡的健康運行。與此同時，車載自組網(wǎng)網(wǎng)絡拓撲頻繁變化的特性給網(wǎng)絡安全問題的解決帶來了極大的挑戰(zhàn)。目前，移動自組網(wǎng)安全研究已經(jīng)有了較大的進展，但是很多有關移動自組網(wǎng)的安全解決方案難以在車載自組網(wǎng)獨特的網(wǎng)絡環(huán)境中適用。充分考慮車載自組網(wǎng)本身的特性并建立行之有效的信任管理模型是眾多解決安全通信、保障網(wǎng)絡健壯性的方案之一。 本文提出一種基于節(jié)點信譽的全局信任管理解決方案。本方案通過利用大數(shù)定理設計合理的算法對網(wǎng)絡中節(jié)點的經(jīng)驗信任進行篩選和過濾，保證節(jié)點間能夠安全的分享經(jīng)驗信任。此外，在對網(wǎng)絡中惡意節(jié)點判定中，本方案引入動態(tài)閾值的概念。信譽管理中心可根據(jù)網(wǎng)絡中實時的信譽水平，不斷調整判定閾值，提高了對惡意節(jié)點識別的準確性。分析表明，該方案與現(xiàn)有的信任管理方案相比有著更多的優(yōu)點：首先，它能夠有效地處理陌生節(jié)點及新加入節(jié)點的信任，從而更快地融入網(wǎng)絡。其次，克服了經(jīng)驗信任的主觀性缺陷，從一種相對客觀的角度維護信任，保障信任的公正性，增強了網(wǎng)絡抵抗惡意節(jié)點攻擊的能力。最后，在網(wǎng)絡拓撲變化頻繁的環(huán)境下，能夠充分共享不同節(jié)點的信任，，避免了信任資源的浪費，即使在網(wǎng)絡稀疏的情況下仍能夠正常工作。
[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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.08
本文編號：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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.08
【參考文獻】
相關期刊論文 前1條
1 常促宇;向勇;史美林;;車載自組網(wǎng)的現(xiàn)狀與發(fā)展[J];通信學報;2007年11期
本文編號：2278046
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