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Inicio  /  Information  /  Vol: 13 Par: 10 (2022)  /  Artículo
ARTÍCULO
TITULO

Anomaly Detection Approach in Industrial Control Systems Based on Measurement Data

Xiaosong Zhao    
Lei Zhang    
Yixin Cao    
Kai Jin and Yupeng Hou    

Resumen

Anomaly detection problems in industrial control systems (ICSs) are always tackled by a network traffic monitoring scheme. However, traffic-based anomaly detection systems may be deceived by anomalous behaviors that mimic normal system activities and fail to achieve effective anomaly detection. In this work, we propose a novel solution to this problem based on measurement data. The proposed method combines a one-dimensional convolutional neural network (1DCNN) and a bidirectional long short-term memory network (BiLSTM) and uses particle swarm optimization (PSO), which is called PSO-1DCNN-BiLSTM. It enables the system to detect any abnormal activity in the system, even if the attacker tries to conceal it in the system?s control layer. A supervised deep learning model was generated to classify normal and abnormal activities in an ICS to evaluate the method?s performance. This model was trained and validated against the open-source simulated power system dataset from Mississippi State University. In the proposed approach, we applied several deep-learning models to the dataset, which showed remarkable performance in detecting the dataset?s anomalies, especially stealthy attacks. The results show that PSO-1DCNN-BiLSTM performed better than other classifier algorithms in detecting anomalies based on measured data.

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