  \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.
