【摘要】：隨著社會(huì)經(jīng)濟(jì)水平的提高和科學(xué)技術(shù)的發(fā)展,人們對(duì)現(xiàn)代便利生活有了更高的要求。汽車(chē)作為現(xiàn)代生活出行的基本工具越來(lái)越成為人們?nèi)粘Ｉ畹闹匾M成部分,進(jìn)而對(duì)汽車(chē)的舒適性、安全性有了更高的要求。智能車(chē)鑰匙系統(tǒng)提高了汽車(chē)的自動(dòng)程度,極大便利了用戶(hù)。然而傳統(tǒng)的智能車(chē)鑰匙系統(tǒng)采用準(zhǔn)雙向通信模式,易被攻擊者截獲低頻報(bào)文,進(jìn)而誘導(dǎo)高頻加密信號(hào),因此存在安全隱患。即使采用全雙向通信模式消除了這個(gè)隱患,也不能有效防范中繼攻擊。距離邊界協(xié)議理論上可以防止中繼攻擊,但距離邊界協(xié)議理論需要很高的時(shí)間精度,缺乏廣泛適用的實(shí)現(xiàn)方案。作為物聯(lián)網(wǎng)的延伸,車(chē)聯(lián)網(wǎng)實(shí)現(xiàn)了人、車(chē)、路和環(huán)境的協(xié)同交互,將使用戶(hù)擁有更加安全、舒適的駕駛環(huán)境,未來(lái)智能車(chē)鑰匙系統(tǒng)也將成為車(chē)聯(lián)網(wǎng)的一個(gè)重要組成部分。然而,傳統(tǒng)智能車(chē)鑰匙系統(tǒng)不能與車(chē)身控制模塊有效結(jié)合,進(jìn)而無(wú)法拓展實(shí)現(xiàn)車(chē)內(nèi)的更多功能,也無(wú)法接入網(wǎng)絡(luò)與外界通信,因此其不符合車(chē)聯(lián)網(wǎng)的發(fā)展趨勢(shì)。本文改進(jìn)了智能車(chē)鑰匙系統(tǒng),并提出了一種安全防護(hù)方案,通過(guò)無(wú)線(xiàn)網(wǎng)絡(luò)實(shí)現(xiàn)遠(yuǎn)程控制汽車(chē),并在車(chē)內(nèi)將智能車(chē)鑰匙系統(tǒng)與CAN總線(xiàn)整合。設(shè)計(jì)并實(shí)現(xiàn)了汽車(chē)與服務(wù)器間通信、汽車(chē)與鑰匙間通信的安全協(xié)議。通過(guò)引入無(wú)線(xiàn)網(wǎng)絡(luò),當(dāng)用戶(hù)遠(yuǎn)離汽車(chē)時(shí),可通過(guò)網(wǎng)絡(luò)關(guān)閉汽車(chē)本地智能車(chē)鑰匙子系統(tǒng),隔絕了針對(duì)智能車(chē)鑰匙系統(tǒng)的中繼攻擊等攻擊方式;同時(shí),還可以遠(yuǎn)程監(jiān)控汽車(chē)狀態(tài)信息,若遭到攻擊,可向遠(yuǎn)程報(bào)警,以便用戶(hù)采取對(duì)應(yīng)措施。通過(guò)引入CAN總線(xiàn),將智能車(chē)鑰匙系統(tǒng)整合入車(chē)身控制系統(tǒng),使系統(tǒng)具有了實(shí)時(shí)性好、可靠性高及方便拓展的優(yōu)點(diǎn),且便于準(zhǔn)確快速地進(jìn)行故障診斷和更新固件程序。搭建了系統(tǒng)軟硬件平臺(tái),包括硬件平臺(tái)、天線(xiàn)設(shè)計(jì)與制作,軟件、協(xié)議設(shè)計(jì)與開(kāi)發(fā)等。最后測(cè)試了系統(tǒng)的安全策略和各項(xiàng)功能,驗(yàn)證了本方案設(shè)計(jì)的有效性。
[Abstract]:With the improvement of social and economic level and the development of science and technology, people have higher requirements for modern convenient life. As a basic means of travel in modern life, automobile has become an important part of people's daily life, and has a higher requirement for comfort and safety of automobile. Intelligent car key system improves the automatic degree of the car and greatly facilitates users. However, the traditional intelligent vehicle key system adopts quasi-bi-directional communication mode, which is easy for attackers to intercept low-frequency messages and then induce high-frequency encrypted signals, so there is a security hazard. Even if full two-way communication mode is used to eliminate this hidden danger, it can not effectively prevent relay attacks. Distance boundary protocol can prevent relay attack in theory, but the theory of distance boundary protocol needs high time precision and lacks of widely applicable implementation scheme. As an extension of the Internet of things, the Internet of vehicles realizes the collaborative interaction among people, cars, roads and environments, which will make users have a safer and more comfortable driving environment. The intelligent car key system in the future will also become an important part of the Internet of cars. However, the traditional intelligent vehicle key system can not be effectively combined with the body control module, and then it can not expand to realize more functions in the car, nor can it connect to the network to communicate with the outside world, so it is not in line with the trend of the development of the car network. In this paper, the key system of intelligent vehicle is improved, and a security protection scheme is put forward. The remote control of vehicle is realized through wireless network, and the key system of intelligent vehicle is integrated with CAN bus in the vehicle. The safety protocols of communication between vehicle and server and between car and key are designed and realized. Through the introduction of wireless network, when the user is away from the car, the local intelligent vehicle key subsystem can be shut down through the network, and the attack mode such as relay attack against the intelligent vehicle key system can be isolated. At the same time, the vehicle status information can be monitored remotely, if attacked, the remote alarm can be made, so that the user can take corresponding measures. Through the introduction of CAN bus, the intelligent car key system is integrated into the body control system. The system has the advantages of good real-time performance, high reliability and convenient expansion, and is convenient for accurate and rapid fault diagnosis and updating firmware program. The hardware and software platform of the system is built, including hardware platform, antenna design and manufacture, software, protocol design and development, etc. Finally, the security policy and functions of the system are tested, and the effectiveness of the scheme is verified.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：U463.6

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