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 …

In this letter, we consider delay-constrained covert communications with the aid of a full-
duplex (FD) receiver. Without delay constraints, it has been shown that the transmit power of …

Covert communication hides the transmission of a message from a watchful adversary, while
ensuring reliable information decoding at the receiver, providing enhanced security in …

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 communication is to achieve a reliable transmission from a transmitter to a receiver
while guaranteeing an arbitrarily small probability of this transmission being detected by a …

Covert communication conceals transmission of messages between Alice and Bob from an
adversary, Willie, who tries to determine if a transmission took place or not. While covert …

Covert communications enable a transmitter to send information reliably in the presence of
an adversary, who looks to detect whether the transmission took place or not. We consider …

Covert communications hide the transmission of a message from a watchful adversary while
ensuring a certain decoding performance at the receiver. In this paper, a wireless …

Prior studies on covert communication with noise uncertainty adopted a worst-case
approach from the warden's perspective. That is, the worst-case detection performance of …

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