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Industrial Control Systems
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Industrial control systems (ICSs) for critical infrastructure are extensively utilized to provide the fundamental functions of society and are frequently employed in critical infrastructure. Therefore, security of these systems from cyberattacks is essential.

industrial control systems intrusion detection system
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Update Date: 20 Jun 2022
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    1. Introduction

    In critical infrastructures that supply crucial services such as water, electricity, or communications, industrial control systems (ICSs) are at the heart of the operation. ICSs provide the foundational services for monitoring and controlling industrial operations. The monitoring section uses sensors to collect data, keep track of the processes, and ensure that they run properly [1]. On the one hand, the monitoring section oversees operations and ensures that they run correctly. On the other hand, the controlling portion manages the processes and makes decisions that cause actions to be carried out by actuators. If this workflow is disrupted as a result of technological difficulties or cyberattacks, many citizens may be adversely affected, for example, as a result of interruptions in electrical power or communications [2].
    Information technology stacks (ITS) and remote connections are commonly used to link ICS components. An increase in the likelihood of deliberate assaults on physical plants might result from reliance on communication networks to transmit measurements. Authentication, data encryption, and message integrity procedures are just a few methods for keeping network traffic safe. Despite this, these solutions cannot defend all layers of an ICS network from all types of invasions of privacy [3].
    Operational technology (OT) processes, which are critical components of infrastructure, are routinely targeted by criminal organizations. In the past, OT and information technology (IT) networks were kept separate or “air-gapped” from one another [4]. However, due to increased efficiency gained via digitalization, new business requirements are emerging, increasing the time and money spent on digitalization. However, due to digitalization’s increased efficiency, new business requirements are emerging, increasing the number of organizations using the technology [5]. Over the Internet of Things (IoT), sensor and actuator data, and multimedia data such as images and videos, are transmitted. It is vital to put security measures in place to protect against malicious behavior and cyber risks. On the one hand, cybersecurity approaches, which are critical to the long-term health of supply chains, are required to ensure the safety of workers and commodities and to protect information passing via their networks, among other things. On the other hand, a cyberattack on an ICS might result in a malfunction, which could cause physical harm to other physical components or even humans [6]. A cyberattack may result in the theft of confidential information about a company’s business activities; it may also have the unintended consequence of decreasing the degree of competitiveness of the industry in the long term. The percentage of malware threats to ICSs over the last four years is presented in Figure 1.
    Figure 1. Malware threats to ICSs over the last four years.
    An intrusion detection system (IDS) is one method of dealing with this problem. The detection methodologies used by signature-based and anomaly-based IDSs are distinct [7]. The signature-based technique instructs the system to seek specific anomalies. In contrast, the anomaly-based strategy instructs the system to look for any deviation from a previously defined standard of behavior. Most of the time, an IDS examines the network traffic of an ICS to detect irregularities in the incoming data packets. It is possible to safeguard a network from unwanted infiltration attempts by implementing a network intrusion detection system (NIDS), also known as packet filtering. The NIDS model utilized in various studies [8][9][10][11][12] was developed using machine learning approaches to detect network traffic intrusions. Because of its capacity to identify and quantify attacks in the network flow, even if its performance against encrypted data packets, fake IP packets, and regular false-positive alerts are not guaranteed, it is becoming increasingly popular.
    Anomaly detection in industrial control systems (MADICSs) is a comprehensive technique for identifying abnormalities in ICSS and is presented as a solution. To detect cyber risks in ICSS, MADICSs seeks to provide a consistent and unified approach for comparing data, which any researcher can utilize to compare data from different sources. Although these processes are based on a standard machine learning/deep learning methodology [13][14], they have been tailored for industrial settings. They can deal with the unique challenges of these types of scenarios. The statistically significant relationship between the characteristics of an ICS and the repetitiveness of its actions is one of the peculiarities that distinguishes it from other scenarios, such as 5G networks [15] or clinical information systems [16].

    2. Industrial Control Systems

    Previous research has focused on detecting cyberattacks on ICSs, which has resulted in several publications. An IDS based on rules and deterministic finite automata (DFA) are two examples of this system. The majority of current research has focused on developing new approaches that have taken advantage of cutting-edge technologies, such as big data and machine learning/deep learning. A growing number of machine learning (ML) and deep learning (DL) approaches are being used to detect cyberattacks in the industrial sector. The most significant publications on ML and DL anomaly detection in industrial contexts are evaluated here [16].
    Many academic ICSs use publicly available datasets to investigate ML algorithms, which is becoming increasingly common. The following are some of the drawbacks of the public database system in use today. The architecture proposed is limited to materials based on the Modbus/TCP protocol suite [17]. There was very little data acquired during online testing activities by [18], and only multi-ML algorithms were developed due to those activities. A similar issue existed in [19], where the database used was outdated and did not represent current threats. In contrast, the dataset in [20] was small (around 1000 occurrences) and was restricted to a single cyberattack. According to another report, the database was out of date and the assaults were linked to the field of IT [21]. The Singapore University of Technology developed a water treatment testbed that included supervisory control and data acquisition (SCADA) network traffic and assault scenarios for use in water treatment [22]. To train and test ML systems, real-time datasets, including common cyberattacks and 35 different types of cyberattacks, have recently been generated for training and testing ML systems. The only strategies that have been used to compare the performances of different algorithms are supervised ML techniques. The results have shown that algorithms have a considerable probability of false detection, which is supported by the literature. The performance of ML algorithms on a public dataset may result in a decent output depending on the dataset [23]. However, the payload/data frame is controlled using dataset labels, and the assaults are manually randomized and parameterized to imitate the operational/attack situation [24].
    Many DL and ML approaches have been reported in the literature, in addition to convolution neural network and long short-term memory (CNN-LSTM) networks. According to [25], unsupervised ML may be used to identify irregularities in cyber-physical systems (CPS). Among 23 methods, they tested deep neural networks (DNNs) and support vector machine (SVM) techniques, which were both designed specifically to work with time-series data. They used the test dataset’s mean and standard deviation to scale the dataset to a new size. Autoencoders (AE) and 1D convolutional neural networks (CNN) were proposed in [26] as a DL approach for identifying ICS anomalies. Additionally, the authors recommended filtering features to choose those most suited for anomaly detection from among the DL models they presented. They developed a feature extraction method that used the discrete Fourier transform (DFT) to compute features in the frequency domain. When utilizing DFT to extract features, important information from the remaining signal was lost instead of using only the highest energy bands. In addition, they used a threshold for anomaly detection based on the test dataset’s mean and standard deviation. Unsupervised anomaly detection was presented by the authors of [27] that focused on large-scale and real-time data processing. The three pillars of this strategy were update triggers, tree growth, and mass weighting methods. Thanks to this combination, random trees could be generated and updated in real time. They described the use of clustering analysis to reveal the dataset’s underlying patterns for another unsupervised anomaly detection. Next, the researchers used cluster intra-distances and inter-distances to extract features from the clusters [28]. Finally, an inference method was used to determine whether an irregularity was sparked. The authors in [29] devised an unsupervised learning technique based on stacked denoising autoencoders. Because the original network stream was used in their solution, it did not require any special skills.
    Furthermore, several surveys on IDSs have been conducted on IoT networks and their lightweight devices. Nevertheless, the majority of these surveys did not address the deployment of ML or DL approaches as detection mechanisms in IoT networks and their networks in any depth. In several recent studies, it was observed that the emphasis was on studying IoT security difficulties in general and categorizing them into multiple layers related to applications, network security, encryption, authentication, and access controls [30][31][32][33][34][35].

    References

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    2. Kargl, F.; van der Heijden, R.W.; König, H.; Valdes, A.; Dacier, M.C. Insights on the Security and Dependability of Industrial Control Systems. IEEE Secur. Priv. 2014, 12, 75–78.
    3. Threats against Industrial Control Systems on the Rise in H2 2020, Growing by Nearly 8 Percentage Points in the Engineering Sector. Available online: https://www.kaspersky.com/about/press-releases/2021_threats-against-industrial-control-systems-on-the-rise-in-h2-2020 (accessed on 19 April 2022).
    4. George, G.; Thampi, S.M. A Graph-Based Security Framework for Securing Industrial IoT Networks from Vulnerability Exploitations. IEEE Access 2018, 6, 43586–43601.
    5. Fan, X.; Fan, K.; Wang, Y.; Zhou, R. Overview of cyber-security of industrial control system. In Proceedings of the 2015 International Conference on Cyber Security of Smart Cities, Industrial Control System and Communications (SSIC), Shanghai, China, 5–7 August 2015; pp. 1–7.
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    7. Wang, Y.; Meng, W.; Li, W.; Li, J.; Liu, W.X.; Xiang, Y. A fog-based privacy-preserving approach for distributed signature-based intrusion detection. J. Parallel Distrib. Comput. 2018, 122, 26–35.
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    10. Manzoor, I.; Kumar, N. A feature reduced intrusion detection system using ANN classifier. Expert Syst. Appl. 2017, 88, 249–257.
    11. Miller, B.; Rowe, D. A survey SCADA of and critical infrastructure incidents. In Proceedings of the 1st Annual Conference on Research in Information Technology, Calgary, AB, Canada, 11–13 October 2012; pp. 51–56.
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    13. Fernández Maimó, L.; Perales Gómez, A.L.; García Clemente, F.J.; Gil Pérez, M.; Martínez Pérez, G. A Self-Adaptive Deep Learning-Based System for Anomaly Detection in 5G Networks. IEEE Access 2018, 6, 7700–7712.
    14. Fernández Maimó, L.; Huertas Celdrán, A.; Gil Pérez, M.; García Clemente, F.J.; Martínez Pérez, G. Dynamic management of a deep learning-based anomaly detection system for 5G networks. J. Ambient Intell. Humaniz. Comput. 2019, 10, 3083–3097.
    15. Fernández Maimó, L.; Huertas Celdrán, A.; Perales Gómez, A.L.; García Clemente, F.J.; Weimer, J.; Lee, I. Intelligent and dynamic ransomware spread detection and mitigation in integrated clinical environments. Sensors 2019, 19, 1114.
    16. Goh, J.; Adepu, S.; Junejo, K.N.; Mathur, A. A Dataset to Support Research in the Design of Secure Water Treatment Systems. In Critical Information Infrastructures Security; Havarneanu, G., Setola, R., Nassopoulos, H., Wolthusen, S., Eds.; Springer International Publishing: Cham, Switzerland, 2017; pp. 88–99.
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    View Times: 88
    Revisions: 2 times (View History)
    Update Date: 20 Jun 2022
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      Alkahtani, H.; Aldhyani, T.H.H. Industrial Control Systems. Encyclopedia. Available online: https://encyclopedia.pub/entry/24203 (accessed on 06 February 2023).
      Alkahtani H, Aldhyani THH. Industrial Control Systems. Encyclopedia. Available at: https://encyclopedia.pub/entry/24203. Accessed February 06, 2023.
      Alkahtani, Hasan, Theyazn H. H. Aldhyani. "Industrial Control Systems," Encyclopedia, https://encyclopedia.pub/entry/24203 (accessed February 06, 2023).
      Alkahtani, H., & Aldhyani, T.H.H. (2022, June 20). Industrial Control Systems. In Encyclopedia. https://encyclopedia.pub/entry/24203
      Alkahtani, Hasan and Theyazn H. H. Aldhyani. ''Industrial Control Systems.'' Encyclopedia. Web. 20 June, 2022.
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