OPC UA information transfer via unidirectional data diode for ICS cyber security

Cyber attacks on critical infrastructure pose serious threats. When industrial control systems (ICS) are targeted by cyber attacks, the resulting incidents cause not only security problems but also safety and pestilence issues. Encrypting the communication data passing through the data diode with OPC UA will further improve the security of the communication in ICS. In this paper, we propose a method to establish both a data diode that prevents intrusion and an OPC UA encrypted communication that prevents interception and tampering.