This paper presents a unicast beamforming network for covert ambient backscatter
communications (AmBC). Different from the prior covert backscatter works using artificial …

In this work, we study the covert communications in ambient backscatter systems (ABS) with
uncontrollable RF source on AWGN channels. In contrast to the prior works impractically …

This letter investigates the limit covert rate of ambient backscatter communications over
additive white Gaussian noise channel, where Alice expects to reliably transmit information …

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 consider covert communications for bistatic backscatter systems, where a
tag transmits information passively to a reader by reflecting incident carrier signals with …

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 …

In this letter, a reconfigurable intelligent surface (RIS)-based passive covert communication
scheme is proposed, where source node Alice covertly transmits information to receiver Bob …

Covert communication in backscatter radio systems is considered, where the transmitter
controls its transmit power to keep the transponder's response hidden, while a warden tries …

This paper investigates covert communications with finite blocklength in the presence of
multiple randomly distributed wardens, which are modeled as a Poisson point process …

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 …