车载网安全是车载网及智能交通发展的重要保障，然而现有的车载网安全技术面临模型陈旧、效率低下等问题，这成为阻碍车载网快速发展与应用的瓶颈。本课题突破现有移动通信技术的局限，从未来的5G移动通信环境出发，提出“模型设计→隐私保护→度量机制”的理论体系，利用边缘计算的思想，从系统性能、网络负载和通信安全三个方面集中解决5G车载网中的安全通信与隐私保护问题。首先，建立一种基于边缘计算的新型5G车载网系统模型；其次，深入研究边缘节点的签名算法，建立新型车载网环境下的条件隐私保护机制；再次，利用基于边缘计算的LBS模型，构建新型车载网络环境下的车辆位置隐私保护策略；最后，基于形式化分析的数据隐私水平度量和信息论的位置隐私水平度量相结合的方法，建立完善的隐私保护水平度量体系。解决上述科学问题，建立一套支持5G移动通信环境的车载网安全理论体系和方法，为未来智能交通的发展奠定可靠的安全理论和应用基础。

The security of the vehicular network is an important guarantee for the development of the vehicular network and the intelligent transportation. However, the existing security technology of the vehicular network is facing the problems of old model, low efficiency and so on, and this has become a bottleneck that hinders the rapid development and application of the vehicular network. This project breaks through the limitations of the existing mobile communication technology. Considering the future 5G mobile communication environment, we propose the theoretical system on “model design→privacy protection→measurement mechanism”. This project aims to comprehensively solve the problems of secure communication and privacy protection in 5G-enabled vehicular network from system performance, network load and communication security by adopting the idea of edge computing. First, a new 5G-enabled vehicular network system model based on edge computing will be established. Second, the signature algorithms of edge nodes will be studied deeply, and the new conditional privacy protection mechanism in the new 5G-enabled vehicular network will be established. Third, the LBS system model based on edge computing is adopted to construct the vehicle location privacy protection strategy under the new vehicular network environment. Finally, by our adoption of the method of combining the measurement of data privacy level based on the formal analysis with the measurement of location privacy level based on the information theory, a perfect measurement system of privacy protection level will be established. After solving the above scientific problems, the theoretical system and method which can support the security of vehicular network in 5G communication environment will be established, and it can provide the security theory and applied basis for the development of the intelligent transportation.