关键词: 5G, 安全威胁, 移动通信系统, 网络安全, 标准研究

Abstract: Abstract5G system is a higher stage of the development of mobile communication systems, the foundation of Internet of things, and an important infrastructure for realizing social services and the smart of people's lives. Under the guidance of the Ministry of Industry and Information Technology, China has made brilliant achievements in the development of communications technology. The rapid development of mobile communication technology in 5G will become the cornerstone of the rapid development of various industries. The higher the degree of dependence on network communication technology, the more important the security protection techniques and security assurance mechanisms will be. Therefore, the security of 5G systems is the key to 5G system design, network deployment, and normal operation. Based on the research of the first stage Rel15 version documents of the 5G security standard of the 3GPP standard organization, it introduces the progress of 5G security standardization research, analyzes the security threats and security requirements of 5G systems, proposes the security objectives of 5G systems, and sorts out 5G The security design principles of the system. It summarizes the enhanced security features of 5G mobile communication systems by comparing the differences between the security functions of 5G systems and 4G systems.

Key words: 5G, security threats, mobile communication system, network security, standard research