智能车钥匙系统及其安全防护研究与设计
发布时间：2019-03-29 07:42
【摘要】：随着社会经济水平的提高和科学技术的发展,人们对现代便利生活有了更高的要求。汽车作为现代生活出行的基本工具越来越成为人们日常生活的重要组成部分,进而对汽车的舒适性、安全性有了更高的要求。智能车钥匙系统提高了汽车的自动程度,极大便利了用户。然而传统的智能车钥匙系统采用准双向通信模式,易被攻击者截获低频报文,进而诱导高频加密信号,因此存在安全隐患。即使采用全双向通信模式消除了这个隐患,也不能有效防范中继攻击。距离边界协议理论上可以防止中继攻击,但距离边界协议理论需要很高的时间精度,缺乏广泛适用的实现方案。作为物联网的延伸,车联网实现了人、车、路和环境的协同交互,将使用户拥有更加安全、舒适的驾驶环境,未来智能车钥匙系统也将成为车联网的一个重要组成部分。然而,传统智能车钥匙系统不能与车身控制模块有效结合,进而无法拓展实现车内的更多功能,也无法接入网络与外界通信,因此其不符合车联网的发展趋势。本文改进了智能车钥匙系统,并提出了一种安全防护方案,通过无线网络实现远程控制汽车,并在车内将智能车钥匙系统与CAN总线整合。设计并实现了汽车与服务器间通信、汽车与钥匙间通信的安全协议。通过引入无线网络,当用户远离汽车时,可通过网络关闭汽车本地智能车钥匙子系统,隔绝了针对智能车钥匙系统的中继攻击等攻击方式;同时,还可以远程监控汽车状态信息,若遭到攻击,可向远程报警,以便用户采取对应措施。通过引入CAN总线,将智能车钥匙系统整合入车身控制系统,使系统具有了实时性好、可靠性高及方便拓展的优点,且便于准确快速地进行故障诊断和更新固件程序。搭建了系统软硬件平台,包括硬件平台、天线设计与制作,软件、协议设计与开发等。最后测试了系统的安全策略和各项功能,验证了本方案设计的有效性。
[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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.6
[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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.6
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