Abstract
This letter provides a unified performance analysis of secure reconfigurable intelligent surface (RIS)-assisted communications in the presence of discrete phase shifts. In particular, we derive exact secrecy outage probability in the presence of non-colluding and colluding eavesdroppers, and we obtain the corresponding diversity orders. Moreover, analytical expressions of the average secrecy rate and different scaling laws with sufficiently large signal-to-noise ratio and number of RIS reconfigurable elements are derived. Simulation results corroborate our theoretical analysis.
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