In this paper, we investigate the performance of covert communications in different types of a
relay system: decode-and-forward (DF), compress-and-forward (CF) and amplify-and …

In this letter, we investigate covert communication in relay networks with relay selection. We
consider the scenario that while forwarding the source's message, the selected relay …

In this paper, we study covert communications strategies in a compress-and-forward (CF)
relay system. Along with a public message to a destination node via a CF relay, a source …

Multi-hop transmissions are desirable in realizing large-scale long-distance covert wireless
communications, since a single-hop transmission cannot fully satisfy the covertness …

Covert communication aims to shield the very existence of wireless transmissions in order to
guarantee a strong security in wireless networks. In this work, for the first time we examine …

In this letter, we investigate covert relay communications with finite block-length against
combining detection, in which two-hop signals received by the warden can be combined to …

This paper focuses on the covert communication in a two-hop relay system consisting of a
transmitter, a relay, a receiver and a warden, where the relay can flexibly select between the …

Covert wireless communication ensures information security by hiding the existence of the
information transmission itself. Available works mainly focused on the covert throughput …

We investigate covert wireless communication in a multi-antenna relay network, where the
relay transmits its own covert message to the destination when assisting the source's …

In this work, a covert communication scheme under block-fading channels is proposed
where the relay, apart from forwarding source's information to the destination, also acts as a …