无线物理层密钥生成技术发展及新的挑战

物理层安全技术从信息论安全理论出发，保障通信安全，是实现安全与通信一体化的关键手段，逐渐成为国内外研究热点。该文围绕无线通信物理层密钥生成技术研究，主要聚焦在物理层密钥生成技术的理论模型，机制机理和研究现状，重点对比分析了两种不同类型密钥生成算法，即源型密钥生成算法和信道型密钥生成算法的区别和联系，揭示了物理层密钥技术利用通信信道内在安全属性促进通信安全的实质。特别地，该文给出了一种可行的物理层密钥生成5G工程实现框架。最后，该文展望了物理层密钥生成技术未来可能的研究方向。

Development of Wireless Physical Layer Key Generation Technology and New Challenges

Physical layer security technology secures wireless communications based on information security theory, which is the key means to realize the integration of security and communication, and has become gradually a research hotspot at home and abroad. The research of key generation technology in the physical layer of wireless communication is studied, mainly focusing on the theoretical model, mechanism and research status of key generation technologies. Through the comparison and analysis of the two different types of key generation algorithms, that is, the source key generation algorithm and the channel key generation algorithm, the essence of physical layer key technologies using communication channel’s inherent security attributes to promote communication security is revealed. In particular, a feasible physical layer key generation 5G engineering implementation framework is presented. Finally, the possible future research directions of physical layer key generation technologies is prospected.