  Secrecy outage probability (SOP) and secrecy rate (SR) of the reconfigurable
intelligent surface (RIS) assisted wireless networks under Rician fading are
investigated in this paper. More precisely, we enhance the secrecy performance
of the considered networks by suppressing the wiretap channel instead of
maximizing the main channel. We propose a simple heuristic algorithm to find
out the optimal phase-shift of each RIS's element. Simulation results based on
the Monte-Carlo method are given to verify the superiority of the proposed
optimal phase-shifts compared to the random phase-shifts design.
