Backscatter communication is an energy-efficient technique that enables sustainable wireless connectivity with a minimal environmental impact. In this paper, the secrecy performance of practical non-linear energy-harvesting backscatter communications with various tag selection schemes is analyzed in Nakagami-m fading channels. We consider four tag selection schemes: sub-optimal, minimal eaves-dropping, optimal, and random tag selection. Closed-form expressions for secrecy outage probability (SOP) and intercept probability (IP) are derived for each scheme, along with asymptotic expressions to provide deeper insights. The impact of system and fading parameters on SOP and IP is investigated, and simulation results are presented to validate the accuracy of the analytical expressions.

翻译：反向散射通信是一种能量高效的技术，能以最小的环境影响实现可持续的无线连接。本文在Nakagami-m衰落信道中，分析了采用不同标签选择方案的实际非线性能量收集反向散射通信的保密性能。我们考虑了四种标签选择方案：次优选择、最小窃听选择、最优选择和随机选择。针对每种方案，推导了保密中断概率和截获概率的闭式表达式，并给出了渐近表达式以提供更深入的见解。研究了系统和衰落参数对保密中断概率与截获概率的影响，并通过仿真结果验证了理论表达式的准确性。