The study of the fundamental limits of covert communications, where a transmitter Alice
wants to send information to a desired recipient Bob without detection of that transmission by …

In this paper, we propose covert localization to improve the security of wireless localization
networks, which can prevent the legitimate transmission of localization signals between …

In this letter, we investigate covert relay communications with finite block-length against
combining detection, in which two-hop signals received by the warden can be combined to …

In this work, we investigated a covert communication method in wireless networks, which is
realized by multiantenna full‐duplex single relay. In the first stage, the source node sends …

In this paper, we propose to use a hybrid relay-reflecting intelligent surface (HR-RIS) to
enhance the performance of a covert communication system. Specifically, the HR-RIS …

To enhance transmission performance, privacy level, and energy manipulating efficiency of
wireless networks, this article initiates a novel simultaneous wireless information and power …

The broadcast nature of wireless communication systems makes wireless transmission
extremely susceptible to eavesdropping and even malicious interference. Physical layer …

Proactive eavesdropping is an effective method for government to monitor suspicious users
who are deemed to misuse communication systems for illegal activities. In this paper …

Physical layer covert communication is a crucial secure communication technology that
enables a transmitter to convey information covertly to a recipient without being detected by …

The covert communication technology has emerged as a novel method for network
authentication, copyright protection, and providing the evidence of cybercrimes. However …