Physical-Layer Security of RIS-Assisted Networks Over Correlated Fisher-Snedecor F Fading Channels

This article investigates the performance of physical-layer security (PLS) in wireless communication systems, where a reconfigurable intelligent surfaces (RISs) is deployed between the transmitter and legitimate receiver to enhance the communication security. The Fisher-Snedecor F distribution is adopted to model the underlying fading channels, owing to its accuracy, tractability and generality. On this basis, this article evaluates the performance of the proposed system by deriving the average secrecy capacity (ASC) and the secrecy outage probability (SOP) under correlated Fisher-Snedecor F channel coefficients. Furthermore, the asymptotic behavior of the ASC and SOP in the high- signal-to-noise ratio (SNR) regime is examined. Analyzing the correlated scenario is crucial as it provides a detailed understanding of how interdependencies among channel coefficients impact the system's security and overall performance, offering valuable insights into real-world communication scenarios. Finally, this article verifies the analytical results through numerical illustrations, and demonstrates the effectiveness of employing RIS.