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 …

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 …

In this paper, we consider a common unicast beamforming network where Alice utilizes the
communication to Carol as a cover and covertly transmits a message to Bob without being …

We consider a scenario in which K transmitters attempt to communicate covert messages
reliably to a legitimate receiver over a discrete memoryless multiple-access channel (MAC) …

This work, for the first time, tackles channel estimation design with pilots in the context of
covert wireless communication. We consider Rayleigh fading for the communication channel …

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 …

We analyze a two-receiver binary-input discrete memoryless broadcast channel, in which
the transmitter communicates a common message simultaneously to both receivers and a …

This paper investigates the limit covert rate of the backscatter communication systems based
on undecodable ambient radio frequency (RF) signals over additive white Gaussian noise …

The problem of covert communication over Multiple-Input Multiple-Output (MIMO) Additive
White Gaussian Noise (AWGN) channels is investigated, in which a transmitter attempts to …

This work investigates the phase gain of intelligent reflecting surface (IRS) covert
communication over complex-valued additive white Gaussian noise (AWGN) channels. The …