Cellular communication technologies such as 5G are deployed on a large scale around the world. Compared to other communication technologies such as WiFi, Bluetooth, or Ultra Wideband, the 5G communication standard describes support for a large variety of use cases, e.g., Internet of Things, vehicular, industrial, and campus-wide communications. An organization can operate a Private 5G network to provide connectivity to devices in their manufacturing environment. Physical Layer Key Generation (PLKG) is a method to generate a symmetric secret on two nodes despite the presence of a potential passive eavesdropper. To the best of our knowledge, this work is one of the first to implement PLKG in a real Private 5G network. Therefore, it highlights the possibility of integrating PLKG in the communication technology highly relevant for industrial applications. This paper exemplifies the establishment of a long-term symmetric key between an aerial vehicle and IT infrastructure both located in a manufacturing environment and communicating via the radio interface of the Private 5G network.

翻译：蜂窝通信技术如5G已在全球范围内大规模部署。相较于WiFi、蓝牙或超宽带等其他通信技术，5G通信标准支持多种应用场景，例如物联网、车联网、工业通信及园区网络。组织可运营私有5G网络，为其制造环境中的设备提供连接。物理层密钥生成（PLKG）是一种在潜在被动窃听者存在的情况下，在两个节点间生成对称密钥的方法。据我们所知，本研究是首批在真实私有5G网络中实现PLKG的工作之一。因此，它突显了在与工业应用高度相关的通信技术中集成PLKG的可行性。本文以位于制造环境中的飞行器与IT基础设施通过私有5G网络无线接口通信为例，展示了长期对称密钥的建立过程。