\textcolor{blue}{In} this paper, we investigate the performance of physical layer security (PLS) over reconfigurable intelligent surfaces (RIS)-aided wireless communication systems, where all fading channels are modeled with Fisher-Snedecor $\mathcal{F}$ distribution. Specifically, we consider a RIS with $N$ reflecting elements between the transmitter and the legitimate receiver to develop a smart environment and also meliorate secure communications. In this regard, we derive the closed-form expressions for the secrecy outage probability (SOP) and average secrecy capacity (ASC). \textcolor{blue}{We also analyze the asymptotic behaviour of the SOP and ASC by exploiting the residue approach}. Monte-Carlo (MC) simulation results are provided throughout to validate the correctness of the developed analytical results, showing that considering RIS in wireless communication systems has constructive effects on the secrecy performance.

翻译：本文研究了可重构智能表面(RIS)辅助无线通信系统中物理层安全(PLS)的性能，其中所有衰落信道均采用Fisher-Snedecor $\mathcal{F}$ 分布建模。具体而言，我们在发射端与合法接收端之间配置一个包含$N$个反射单元的RIS，以构建智能环境并提升安全通信质量。为此，我们推导了保密中断概率(SOP)和平均保密容量(ASC)的闭式表达式，并利用留数方法分析了SOP与ASC的渐近行为。通过蒙特卡洛(MC)仿真验证了解析结果的正确性，结果表明在无线通信系统中引入RIS对保密性能具有建设性影响。