A review and implementation of physical layer channel key generation in the Internet of Things

Physical layer channel key generation is a promising technology for secure communication in wireless network security, which mainly establishes secure communication keys between any two legitimate users. This article reviews current techniques for physical layer channel key generation. The physical layer channel key generation principle, system model, attack model, key generation process, and experimental application are comprehensively reviewed. In addition, we introduce the experimental scenarios of key generation and the collection methods of channel measurements in wireless applications and simulation platforms and summarize the experimental equipment configuration and actual operation in the process of collecting different measurements. The article concludes with some suggestions for future research.