Document Type : Research Article
Authors
1 Information Systems and Security Lab, Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
2 Electronics Research Institute, Sharif University of Technology, Tehran, Iran
Abstract
Industrial control systems are widely used in industrial sectors and critical infrastructures to monitor and control industrial processes. Recently, the security of industrial control systems has attracted a lot of attention, because these systems are now increasingly interacting with the Internet. Classic systems are suffering from many security problems and with the expansion
of Internet connectivity, they are now exposed to new types of threats and cyber-attacks. Addressing this, intrusion detection technology is one of the most important security solutions that is used in industrial control systems to identify
potential attacks and malicious activities. In this paper, we propose Stacked Autoencoder-Deep Neural Network (SAE-DNN), as a semi-supervised Intrusion Detection System (IDS) with appropriate performance and applicability on a wide range of Cyber-Physical Systems (CPSs). The proposed approach comprises a stacked autoencoder, a deep learning-based feature extractor, helping us with a low dimension and low noise representation of data. In addition, our system includes a deep neural network (DNN)-based classifier, which is used to detect anomalies with a high detection rate and low false positive rate in a real-time process. The SAE-DNN’s performance is evaluated on the WADI dataset, which is a real testbed for a water distribution system. The results indicate the superior performance of our approach over existing supervised and unsupervised methods while using a few percentages of labeled data.
Keywords
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