Multiantenna technique can provide a substantial rate gain for wireless communication;
however, when applied in covert wireless communication, the potential detecting risk of pilot …

Covert communication can prevent adversary from knowing the existence of the
transmissions while guaranteeing the security in wireless communications. In this paper …

In this paper, we investigate multi-antenna covert communications, where the transmitter
Alice equips multiple antennas, the legitimate receiver Bob and the eavesdropper Willie …

Internet of Things (IoT) systems are of paramount importance to provide ubiquitous wireless
connectivity for smart cities. However, such systems are facing security challenges due to …

With growing security threats to the evolving wireless systems, protecting user privacy
becomes progressively challenging. Even if the transmitted information is encrypted and the …

In this paper, the covert communication system with the assistance of an active intelligent
reflecting surface (IRS) is investigated. Unlike the conventional passive IRS, which reflects …

Residual hardware impairments widely exist in transceivers and intelligent reflecting surface
(IRS) in practical systems, which lead to serious signal distortion, causing performance loss …

Abstract As the Internet of Things (IoT) becomes increasingly popular, the amount of
information transmitted through the IoT network has increased significantly. Therefore, the …

Covert communication can hide the information transmission process from the warden to
prevent adversarial eavesdropping. However, it becomes challenging when the location of …

Covert wireless communications aim to hide the existence of transmission behavior from
watchful adversaries to enhance security. In this paper, we propose a spectrum mask based …