The development of the fifth generation (5G) wireless networks is gaining momentum to connect almost all aspects of life through the network with much higher speed, very low latency and ubiquitous connectivity. Due to its crucial role in our lives, the network must secure its users, components, and services. The security threat landscape of 5G has grown enormously due to the unprecedented increase in types of services and in the number of devices. Therefore, security solutions if not developed yet must be envisioned already to cope with diverse threats on various services, novel technologies, and increased user information accessible by the network. This paper outlines the 5G network threat landscape, the security vulnerabilities in the new technological concepts that will be adopted by 5G, and provides either solutions to those threats or future directions to cope with those security challenges. We also provide a brief outline of the post-5G cellular technologies and their security vulnerabilities which is referred to as future generations (XG) in this paper. In brief, this paper highlights the present and future security challenges in wireless networks, mainly in 5G, and future directions to secure wireless networks beyond 5G.

中文翻译：

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5G 及以后的安全

第五代 (5G) 无线网络的发展势头强劲，几乎可以通过网络以更高的速度、极低的延迟和无处不在的连接来连接生活的方方面面。由于其在我们生活中的关键作用，网络必须保护其用户、组件和服务。由于服务类型和设备数量的空前增加，5G 的安全威胁格局已大幅增长。因此，必须已经设想出尚未开发的安全解决方案，以应对对各种服务、新技术和网络可访问的用户信息增加的各种威胁。本文概述了 5G 网络威胁格局，5G 将采用的新技术概念中的安全漏洞，并提供应对这些威胁的解决方案或应对这些安全挑战的未来方向。我们还简要概述了后 5G 蜂窝技术及其安全漏洞，本文将其称为后代 (XG)。简而言之，本文重点介绍了无线网络（主要是 5G）当前和未来的安全挑战，以及 5G 之后的无线网络安全的未来方向。