Abstract: The high bandwidth, low latency, and large connection features of 5G networks will greatly improve the informatization level of all industries in the whole society. It not only improves the speed and efficiency of communication between people, but also effectively expands the connection level and communication capability between people and things, and between things and things. In addition, 5G network new services, new technologies and massive terminal users pose new challenges to security and user privacy protection.ITU defined three service scenarios: eMBB, mMTC, and URLLC. IoT devices are massive and unattended, posing new challenges to network security management and security defense. In addition, services that require high reliability and high security, such as power distribution control, automatic driving, and remote surgery, involve industrial control systems and life safety systems, bringing more attention to 5G security. To improve the flexibility, scalability, and fast deployment of the communications system and reduce costs, the 5G network architecture will introduce technologies such as core network service-oriented architecture, network slicing, and multi-access edge computing. Based on the flexibility, scalability, and fast deployment of network functions, these technologies bring new challenges to 5G security.

Key words: 5G, network security, standard security, equipment security, deployment security, operation security

摘要： 5G网络的高带宽、低时延、大连接特性，将大幅度提升全社会各产业的信息化水平.它不仅提升了人与人之间通信的速度和效率，还将有效拓展人与物、物与物之间的连接水平和通信能力.同时，5G网络的业务多样化、新技术的引入、海量的终端用户，对安全和用户隐私保护提出了新的挑战.ITU定义了三大业务场景，eMBB(enhanced mobile broadband)，mMTC(massive machine type communications)，URLLC(ultra-reliable and low-latency communications).大规模物联网设备数量庞大，无人值守，给网络安全管理和安全防御都带来新的挑战.同时，高可靠性高安全性要求的业务，如配电控制、自动驾驶汽车、远程手术等涉及到工业工控系统和生命安全系统的业务，给5G安全带来了更多的关注.为提高通信系统的灵活性、扩展性和快速部署，同时降低成本，5G网络架构将引入核心网服务化架构、切片(network slicing)、边缘计算(multi-access edge computing)等技术.这些技术在使能网络功能的灵活性、可扩展性和快速部署的基础上，也给5G安全带来了新的挑战.

关键词: 5G, 网络安全, 标准安全, 设备安全, 部署安全, 运营安全