IoT is emerging as the future evolution of the Internet, aiming to provide connectivity for everyone and everything. Since IoT is expected to carry important and private information, a high level of PHY security is critical for wireless communications in IoT, as a complement for traditional security techniques that are employed at high layers. In this overview, we examine the recent interest in energy-efficient and cost-efficient PHY solutions for securing downlink IoT transmission through interference exploitation. This exciting line of research departs from conventional interference cancellation, and judiciously employs the inherent interference as a useful element for LUs while obstructing the eavesdropping of information. We first discuss the concept of CI, and then elaborate the fundamental CI signal design that employs the traditionally undesired interference as a constructive element to LUs while ensuring they are destructive to potential Eves. Subsequently, we illustrate several low-hardware-cost techniques to inherit the advantage of CI in an energy- and cost-efficient manner, from the perspective of HBF and DM. This family of techniques brings a disruptive vision of interference management for securing wireless communications with an eye on low-cost and hardware-constrained devices tailored for IoT systems.

中文翻译：

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物联网时代能源和成本高效的物理层安全：干扰的作用

物联网正在成为互联网的未来发展趋势，旨在为每个人和一切提供连接。由于物联网预计会携带重要的私人信息，因此高水平的 PHY 安全性对于物联网中的无线通信至关重要，作为高层采用的传统安全技术的补充。在本概述中，我们研究了最近人们对通过干扰利用来保护下行链路物联网传输的节能且具有成本效益的 PHY 解决方案的兴趣。这一令人兴奋的研究路线与传统的干扰消除不同，明智地将固有干扰用作 LU 的有用元素，同时阻止信息窃听。我们首先讨论CI的概念，然后详细阐述基本的 CI 信号设计，该设计采用传统上不希望的干扰作为 LU 的建设性元素，同时确保它们对潜在的 Eves 具有破坏性。随后，我们从 HBF 和 DM 的角度说明了几种低硬件成本的技术，以节能和经济高效的方式继承 CI 的优势。这一系列技术带来了干扰管理的颠覆性愿景，以确保无线通信安全，并着眼于为物联网系统量身定制的低成本和硬件受限设备。