面向6G的天地一体化网络安全技术

摘要：天地一体化是6G的基本组网架构，现有网络安全技术已不再适用新的安全风险与场景要求。分析了天地一体化网络广覆盖、海量接入、低时延、大带宽通信场景的安全需求。针对天地一体化网络面临的网络拓扑动态变化和卫星平台资源受限的挑战，重点分析了接入认证、星地回传安全传输、星间链路安全传输、轻量化的无线物理层安全、抗量子密码，以及量子保密通信和基于区块链的星地可信联盟等网络安全技术。认为未来有必要研究轻量化的接入认证、星地可信联盟等新技术，以解决当前天地一体化网络的安全与资源矛盾。

关键词：星载基站；星地协同；动态拓扑；轻量化；量子通信

Abstract：Space-Ground Integrated is the fundamental networking architecture for 6G, and existing cybersecurity technologies are no longer adequate to address the new security risks and scenario requirements. This document analyzes the security requirements for the wide coverage, massive access, low latency, and large bandwidth communication scenarios of the Space-Ground Integrated Networks, and focuses on network security technologies such as access authentication, satellite-ground backhaul security transmission, inter-satellite link security transmission, lightweight wireless physical layer security, quantum-resistant cryptography and quantum secure communication, and blockchain-based satellite-ground trusted alliance. It is believed that future research should prioritize the development of new technologies like lightweight access authentication and satellite-ground trusted alliances to resolve the conflict between security and resource constraints in the Space-Ground Integrated Networks.

Keywords：satellite base station; star-ground coordination; dynamic topology; lightweight; quantum communication