In this paper, we investigate the throughput performance of covert communication over a
channel with incumbent channel activities. Unlike existing work, we explicitly consider the …

In this paper, we examine the optimality of Gaussian signalling for covert communications
with an upper bound on D (p 1|| p 0) or D (p 0|| p 1) as the covertness constraint, where D (p …

Covert communication is critical to guarantee a strong security and secure user privacy. In
this work, we consider adversary's noise and channel uncertainties and analyze their impact …

This work studies a covert communication scheme for an uplink multi-user scenario in which
some users are opportunistically selected to help a covert user. In particular, the selected …

Covert communication can hide the information transmission process from the warden to
prevent adversarial eavesdropping. However, it becomes challenging when the location of …

This letter investigates and analyzes covert communications to safeguard backscatter
systems, ie, how to hide backscattering transmission for privacy and security, which is rarely …

In this paper, we investigate covert communication where the relay and the jammer are
jointly selected. It is demonstrated that the improvement of covert communication …

A multi-antenna covert communication system under fading channels is proposed in this
paper, where the existing public communication link is exploited as a cover. With the warden …

Covert communication is achieved if the transmitter (Alice) sends messages to a legitimate
receiver (Bob) without detection by an attentive warden (Willie). Recently, there has been …

Covert communications can hide the very existence of wireless transmissions and thus are
able to address privacy issues in numerous applications of the emerging Internet of Things …