Due to the broadcast nature of wireless radio propagation channels, 5G wireless networks face serious security threats. Security mechanisms that leverage physical layer characteristics have been considered as potential complements to enhance 5G wireless network security. This article proposes physical layer security enhancements to defend against security attacks from the three most significant aspects: wireless secure communication, physical layer assisted authentication and secret key distribution. By integrating physical layer security with novel techniques and application scenarios in 5G communication, we elaborate several promising strategies, including massive MIMO beamforming with security code communication, self-adaptive mobile and cooperative secure communication with dynamic channel prediction, physical layer assisted authentication, malicious node detection and key generation of massive MIMO millimeter wave system. Research opportunities and future challenges are further discussed.

中文翻译：

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智能医疗的可靠性：网络切片视角


由于无线电传播信道的广播性质，5G无线网络面临严重的安全威胁。利用物理层特性的安全机制被认为是增强 5G 无线网络安全性的潜在补充。本文提出物理层安全增强，从无线安全通信、物理层辅助认证和密钥分发三个最重要的方面来防御安全攻击。通过将物理层安全与 5G 通信中的新技术和应用场景相结合，我们阐述了几种有前途的策略，包括具有安全代码通信的大规模 MIMO 波束成形、具有动态信道预测的自适应移动和协作安全通信、物理层辅助身份验证、恶意节点大规模MIMO毫米波系统的检测和密钥生成。进一步讨论了研究机会和未来的挑战。