Information security has always been a critical issue in wireless networks. Apart from other
secure techniques, covert communication emerges as a potential solution to security for …

Unmanned aerial vehicles (UAVs) have been instrumental in enabling many new
applications and services, including military and rescue operations, aerial surveillance …

Unmanned aerial vehicles (UAVs) have attracted a lot of research attention because of their
high mobility and low cost in serving as temporary aerial base stations (BSs) and providing …

Owing to the ever increasing of information privacy requirement, covert communication has
gained more and more attention, whose effective range is limited by the trade-off between …

In this work, we aim to maximize the timeliness of data collection subject to a covertness
constraint in unmanned aerial vehicle (UAV)-aided Internet of Things (IoT) networks, where …

Unmanned aerial vehicles (UAVs)-assisted wireless communication will play an important
role in the next-generation mobile communication network. However, the inherent open …

This work tackles the joint optimization of a unmanned aerial vehicle's (UAV's) three-
dimensional (3D) placement and transmit power for covert communications with the …

In this paper, we study a covert Internet of Things (IoT) system. Compared with conventional
IoT systems that apply cryptography and information-theoretic secrecy approaches to secure …

In this article, we investigate the design of the trajectory of an unmanned aerial vehicle
(UAV) and the transmit power of ground users to improve covert communications against a …

Communication performance relies largely on the availability of channel state information
(CSI). This paper investigates the impact of outdated CSI on the achievable covert …