Securing Low-Altitude Intelligent Networks: Challenges and Solutions

The rapid development of the low-altitude economy (LAE) has spurred the growth of low-altitude intelligent networks (LAINs), which serve as the infrastructure of LAE. While LAINs possess notable advantages as real-time capabilities, wide coverage, high flexibility and cross-layer collaboration, they are confronted with numerous security risks, where they are susceptible to assorted factors including environmental and human-induced attacks. In this paper, we divide LAINs into multiple layers and focus on its wireless communication security, with particular emphasis on various active and passive attacks they encounter. We provide an overview of these attacks and their corresponding countermeasures, comprising encryption to prevent eavesdropping, joint resource optimization to counter jamming attacks and so forth. Moreover, we propose a secure authenticated key agreement (AKA) scheme, resisting various attacks, for multi-UAV access in LAINs, which comprehensively outperforms other schemes in terms of security, computation and communication performance. Finally, we discuss the ongoing challenges and directions of wireless communication security in LAINs.