【摘要】：當(dāng)今道路交通事故的頻發(fā),已經(jīng)成為全社會必須面對的嚴(yán)峻問題之一。車載自組織網(wǎng)絡(luò)(VANET,Vehicular Ad-hoc Network)是專門為減少交通事故和增強(qiáng)道路安全所設(shè)計(jì)的車輛通信自組織網(wǎng)絡(luò)。但傳統(tǒng)的安全和隱私保護(hù)協(xié)議并不完全適用于車載自組網(wǎng),迫切需要設(shè)計(jì)新的適用于VANET的安全認(rèn)證和隱私保護(hù)協(xié)議。代理重簽名技術(shù)是數(shù)字簽名領(lǐng)域中的一個研究熱點(diǎn),能夠有效實(shí)現(xiàn)身份的匿名性,為VANET中的安全認(rèn)證和隱私保護(hù)提供新的方法。針對VANET的隱私保護(hù)問題,采用秘密共享技術(shù),提出了一個安全的車載自組網(wǎng)消息認(rèn)證方案。該方案使用高效的門限代理簽名來保護(hù)隱私,路邊單元將車載單元對消息的簽名轉(zhuǎn)換為認(rèn)證中心對同一消息的簽名,有效消除根據(jù)簽名追蹤車輛的風(fēng)險;同時將重簽名密鑰共享給多個路邊通信單元,有效防止重簽名密鑰受到威脅。認(rèn)證中心還能夠追溯到發(fā)布虛假消息的真實(shí)車輛,解決了違規(guī)車輛的召回問題�；诖碇睾灻w制和無證書公鑰密碼體制,提出了一個安全有效的車載自組網(wǎng)消息認(rèn)證方案。通過引入代理重簽名技術(shù),認(rèn)證中心將車載單元對消息的簽名轉(zhuǎn)換為路邊單元對同一消息的簽名,消除根據(jù)簽名追蹤車輛的風(fēng)險,實(shí)現(xiàn)了車載自組網(wǎng)的安全通信;并且采用的無證書公鑰密碼體制,有效解決了車載自組網(wǎng)中證書管理與密鑰托管的問題。如果車輛發(fā)布虛假消息,認(rèn)證中心能夠準(zhǔn)確追溯到車輛的真實(shí)身份,并召回違法車輛。與同類方案相比,新方案具有較高的安全性和較低的存儲開銷和通信開銷。
[Abstract]:Nowadays, the frequent occurrence of road traffic accidents has become one of the serious problems that the whole society must face. Vehicle Ad Hoc Network (VANET,Vehicular Ad-hoc Network) is a vehicle communication ad hoc network designed to reduce traffic accidents and enhance road safety. However, the traditional security and privacy protection protocol is not fully suitable for on-board ad hoc network, so it is urgent to design a new security authentication and privacy protection protocol for VANET. Proxy resignature technology is a research focus in the field of digital signature, which can effectively realize the anonymity of identity and provide a new method for security authentication and privacy protection in VANET. In order to solve the privacy protection problem of VANET, a secure message authentication scheme for vehicle ad hoc network is proposed by using secret sharing technology. In this scheme, efficient threshold proxy signature is used to protect privacy. Roadside unit converts the signature of the vehicle unit to the message into the signature of the same message by the authentication center, which effectively eliminates the risk of tracking the vehicle according to the signature. At the same time, the resignature key is shared with multiple roadside communication units to effectively prevent the resignature key from being threatened. The certification center can also trace back to real vehicles that publish false news, solving the recall problem of illegal vehicles. Based on the proxy resignature scheme and the certificate-free public key cryptography, a secure and effective message authentication scheme for vehicle ad hoc networks is proposed. By introducing proxy resignature technology, the authentication center converts the signature of the vehicle unit to the signature of the same message by the roadside unit, eliminates the risk of tracking the vehicle according to the signature, and realizes the secure communication of the vehicle ad hoc network. The certificate-free public key cryptosystem is adopted to effectively solve the problems of certificate management and key escrow in vehicle ad hoc networks. If the vehicle publishes false information, the certification center can accurately trace the true identity of the vehicle and recall illegal vehicles. Compared with similar schemes, the new scheme has higher security, lower storage overhead and communication overhead.
【學(xué)位授予單位】：西北師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U463.67;U495;TP309

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