… For secure transmission, our aim is to prevent the untrusted user from decoding Bob’s
message from Alice. Additionally, for covert communication, our goal is to avoid the warden from …

… We first consider a system model consisting of one source, one untrusted … For covert
communications, our aim is to prevent the warden from detecting the presence of communications …

… covert techniques in the existing literature are reviewed. We also discuss the potential
implementation of covert communications in … , where they also prevented the untrusted relays from …

… source transmits the covert message to a destination with the help of an untrusted UAV. We
… such that use UAVs to assist in covert communications while ensuring the security of covert …

… problem of secure communication with covert requirement in untrusted relaying networks. …
, one destination, one untrusted relay, and one Willie. The untrusted relay tries to extract the …

… For the covertness, its goal is to hide the existing of wireless communications from a warden,
ie, covert communications, which can provide enhanced privacy protection for supporting …

… To be more specific, in [25], the authors proposed a power allocation strategy to maximize
the secrecy rate under the covert requirements with multiple untrusted relays. Based on the …

… RATE In this section, we analyze the achievable covert rate of the proposed joint user-…
we analyze covert rate of our presented joint user-jammer scheduling schemes. First, covert …

… covert throughput. Particularly, we investigate the worst-case scenario of covert communication
… , we investigate the covert communication of a legitimate active communicating pair, that …

… to confuse the adversary, which enhanced the covert rate of the NOMA user [12]. Even more
… based covert communication scheme was proposed in the networks with an untrusted relay …