Wireless short-packet communications pose challenges to the reliability and security of the
transmission. Besides, the proactive warder compounds these challenges, who detects and …

Covert communication has been widely investigated to avoid the transmission behavior
being overheard by the warder. However, covert communication may be illegitimately …

The environmental shelters such as public links can enable covert communication by
covering covert transmission. To further exploit shelters, this paper focuses on a two-hop …

Covert communication is an important approach to ensure information security by hiding the
transmission behavior. Space-domain-coding intelligent reflecting surface (SDC-IRS) can …

In this paper, we study covert communications in a hybrid decode-and-forward (DF)/amplify-
and-forward (AF) relay system. The considered relay in normal operation forwards …

This paper investigates the joint relay and transmission mode selection for covert
communication in a wireless relay system with amplify-and-forward (AF) forwarding mode …

Intelligent reflecting surface (IRS) is widely utilized in covert communications to enhance the
system performance by passive beamforming. However, transmission covertness is …