Joint Information Theoretic Secrecy and Covert Communication in the Presence of an Untrusted User and Warden

In this article, we investigate joint information-theoretic secrecy and covert communication in a single-input–multioutput (SIMO) system where a transmitter (Alice) is communicating with two legitimate users (Bob and Carol). We consider that an untrusted user and a warden node are also present in the network attempting to attack the secure and covert communications to Bob and Carol, respectively. ...