Machine Learning-Based Intrusion Detection: Feature Selection versus Feature Extraction

• URL: http://arxiv.org/abs/2307.01570v1
• Date: Tue, 4 Jul 2023 08:48:01 GMT
• Title: Machine Learning-Based Intrusion Detection: Feature Selection versus Feature Extraction
• Authors: Vu-Duc Ngo, Tuan-Cuong Vuong, Thien Van Luong, and Hung Tran
• Abstract summary: Internet of things (IoT) devices are highly vulnerable to cyber-attacks. A variety of machine learning-based network intrusion detection methods for IoT networks have been developed. This paper provides a comprehensive comparison between these two feature reduction methods of intrusion detection in terms of various performance metrics.
• Score: 3.5889226512319903
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Internet of things (IoT) has been playing an important role in many sectors, such as smart cities, smart agriculture, smart healthcare, and smart manufacturing. However, IoT devices are highly vulnerable to cyber-attacks, which may result in security breaches and data leakages. To effectively prevent these attacks, a variety of machine learning-based network intrusion detection methods for IoT networks have been developed, which often rely on either feature extraction or feature selection techniques for reducing the dimension of input data before being fed into machine learning models. This aims to make the detection complexity low enough for real-time operations, which is particularly vital in any intrusion detection systems. This paper provides a comprehensive comparison between these two feature reduction methods of intrusion detection in terms of various performance metrics, namely, precision rate, recall rate, detection accuracy, as well as runtime complexity, in the presence of the modern UNSW-NB15 dataset as well as both binary and multiclass classification. For example, in general, the feature selection method not only provides better detection performance but also lower training and inference time compared to its feature extraction counterpart, especially when the number of reduced features K increases. However, the feature extraction method is much more reliable than its selection counterpart, particularly when K is very small, such as K = 4. Additionally, feature extraction is less sensitive to changing the number of reduced features K than feature selection, and this holds true for both binary and multiclass classifications. Based on this comparison, we provide a useful guideline for selecting a suitable intrusion detection type for each specific scenario, as detailed in Tab. 14 at the end of Section IV.

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