The motivation for this study about Physical Layer Security comes from bridging the gap between the vast theory and a feasible implementation. We propose a Physical-Layer-Security Box as a system-level Box is a system-level solution, named PLS-Box, to solve the key exchange between two wireless communicating parties. The PLS-Box performs a novel key generation method named time-frequency filter-bank. The entropy of the radio channel is harvested via a filter-bank processing, and then turned into a reciprocal security key, at both ends. In this concept work, we also focus on several PLS open issues, such as radio-frequency imperfections and accessibility to the baseband communication modem. The goal is to show a wide applicability of our PLS-Box to actual wireless systems, paving the way for an evolution of existing schemes.

进行有关物理层安全性研究的动机来自弥合广阔理论与可行实施之间的鸿沟。我们提出了一个物理层安全盒作为系统级盒，它是一种系统级解决方案，称为PLS盒，用于解决两个无线通信方之间的密钥交换。PLS-Box执行一种称为时频滤波器组的新颖密钥生成方法。无线电信道的熵通过滤波器组处理收集，然后在两端变成互惠的安全密钥。在这一概念工作中，我们还将重点放在一些PLS开放性问题上，例如射频缺陷和对基带通信调制解调器的可访问性。目的是展示我们的PLS-Box在实际无线系统中的广泛应用，为现有方案的发展铺平道路。