This paper presents an overview of the networked supervisory control frameworks for discrete event systems with imperfect communication networks, which are divided into centralized setup, decentralized setup and distributed setup. The state-of-the-art works on discrete-event addressing channel imperfections that caused by delays, data losses or non-FIFO channels discussed. By presenting key con...

Network covert channels are policy-breaking and stealthy communication channels in computer networks. These channels can be used to bypass Internet censorship, to exfiltrate data without raising attention, to allow a safe and stealthy communication for members of political oppositions and for spies, to hide the communication of military units at the battlefield from the enemy, and to provide st...