Covert communication is a field of study that focuses on communication techniques that are designed to be discreet or hidden from observation. This can include techniques such as encryption, steganography, and other methods of transmitting information in a way that is not easily detected by unauthorized parties. Covert communication is often used in situations where privacy or security is of paramount importance, such as in military operations, intelligence gathering, or criminal activities. Researchers in this field often explore new techniques for hiding or disguising information, as well as ways to detect and counteract covert communication methods.