Anomaly Detection Methods for IIoT Networks

IIoT networks are different from general IT networks such as office or business networks where multiple various types of applications, protocols and traffic profiles are presented, and the cyber security challenges are more on protecting data confidentiality and integrity than on network availability. IIoT networks have special features and face unique challenges in defending against cyber-attacks. This paper briefly describes the requirements and challenges in IIoT network security, and presents an overview of the existing network anomaly detection methods. The paper further presents other anomaly detection methods that are specifically applicable to IIoT networks, as those methods exploit the deterministic features of the physical world in detecting the anomalies in the observed behavior.