In covert communication systems, covert messages can be transmitted without being noticed
by the monitors or adversaries. Therefore, the covert communication technology has …

In a majority of research on covert communications, knowledge about channel state
information (CSI) of main channel and/or warden channel is assumed to be known or …

Covert communication can prevent an adversary from knowing that a transmission has
occurred between two users. In this article, we consider covert wireless communications in …

In this paper, we develop an approach to exploit multiple disparate wireless communication
technologies simultaneously to enhance covertness of a communication link. Specifically …

We present a covert (low probability of detection) communication scheme that exploits the
node multiplicity and channel variations in wireless broadcast networks. The transmitter …

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 …

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

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 …

Covert communication has recently been recognized as a highly promising security
technology that enables a transmitter Alice to reliably and covertly communicate with a …

This paper studies multi‐antenna covert communication exploiting a public communication
link over the wireless fading channel. In particular, a relatively practical covert …