A cryptographic system based on automata for Networked Automation Systems abstracted as Discrete-Event Systems
Marcos Vicente de Brito Moreira, Públio M. Lima, Lilian K. Carvalho, Felipe G. Cabral · 2024
One of the main concerns about implementing Networked Automation Systems is ensuring its security against cyber-attacks. In this paper, we consider that the Networked Automation System is abstracted as a Discrete-Event System, and we consider cyber-attacks where a malicious agent eavesdrops on a communication channel with the objective of gathering information about the system’s behavior. To protect the information transmitted in the attacked channel, we propose a cryptographic system that uses Mealy automata to represent the encryption and decryption functions. One of the main advantages of representing cryptographic systems using automata is that they can be easily implemented on Programmable Logic Controllers, yielding to fast encryption and decryption of the transmitted message.