Thanks to the rapidly developing technology, unmanned aerial vehicles (UAVs) are able to complete a number of tasks in cooperation with each other without need for human intervention. In recent years, UAVs, which are widely utilized in military missions, have begun to be deployed in civilian applications and mostly for commercial purposes. With their growing numbers and range of applications, UAVs are becoming more and more popular; on the other hand, they are also the target of various threats which can exploit various vulnerabilities of UAV systems in order to cause destructive effects. It is therefore critical that security is ensured for UAVs and the networks that provide communication between UAVs. In this survey, we aimed to present a comprehensive detailed approach to security by classifying possible attacks against UAVs and flying ad hoc networks (FANETs). We classified the security threats into four major categories that make up the basic structure of UAVs; hardware attacks, software attacks, sensor attacks, and communication attacks. In addition, countermeasures against these attacks are presented in separate groups as prevention and detection. In particular, we focus on the security of FANETs, which face significant security challenges due to their characteristics and are also vulnerable to insider attacks. Therefore, this survey presents a review of the security fundamentals for FANETs, and also four different routing attacks against FANETs are simulated with realistic parameters and then analyzed. Finally, limitations and open issues are also discussed to direct future work

翻译：得益于快速发展的技术，无人机（UAV）能够在无需人工干预的情况下相互协作完成多项任务。近年来，广泛应用于军事任务的无人机开始部署于民用领域，且主要用于商业目的。随着无人机数量和应用范围的增长，其日益普及；另一方面，它们也成为各种威胁的目标——这些威胁可能利用无人机系统的多种漏洞造成破坏性影响。因此，确保无人机及其通信网络的安全至关重要。在本综述中，我们通过分类针对无人机和飞行自组网（FANET）的可能攻击，旨在呈现一种综合性的安全方法。我们将安全威胁分为构成无人机基本结构的四大类：硬件攻击、软件攻击、传感器攻击和通信攻击。此外，针对这些攻击的应对措施被分为预防和检测两大类分别介绍。我们特别关注FANET的安全——由于其特性，FANET面临重大安全挑战，且易受内部攻击。因此，本综述回顾了FANET的安全基础，并使用真实参数模拟并分析了四种针对FANET的不同路由攻击。最后，讨论了当前局限性和未解决问题，以指导未来研究方向。