In this paper, we investigate the physical layer security capabilities of reconfigurable intelligent surface (RIS) empowered wireless systems. In more detail, we consider a general system model, in which the links between the transmitter (TX) and the RIS as well as the links between the RIS and the legitimate receiver are modeled as mixture Gamma (MG) random variables (RVs). Moreover, the link between the TX and eavesdropper is also modeled as a MG RV. Building upon this system model, we derive the probability of zero-secrecy capacity as well as the probability of information leakage. Finally, we extract the average secrecy rate for both cases of TX having full and partial channel state information knowledge.

翻译：本文研究了可重构智能表面（RIS）赋能无线系统的物理层安全能力。具体而言，我们考虑了一个通用系统模型，其中发射机与RIS之间的链路以及RIS与合法接收机之间的链路均被建模为混合伽马（MG）随机变量（RV）。此外，发射机与窃听者之间的链路也被建模为MG随机变量。基于此系统模型，我们推导了零保密容量的概率以及信息泄露的概率。最后，我们分别提取了发射机具有完全和部分信道状态信息两种情况下的平均保密速率。