A comparative assessment of machine learning algorithms in the IoT-based network intrusion detection systems

The rapid increase in online risks is a reflection of the exponential growth of Internet of Things (IoT) networks. Researchers have proposed numerous intrusion detection techniques to mitigate the harm caused by these threats. Enterprises use intrusion detection systems (IDSs) and intrusion prevention systems (IPSs) to keep their networks safe, stable, and accessible. Network intrusion detection solutions have lately integrated powerful Machine Learning (ML) techniques to safeguard IoT networks. Selecting the proper data features for effectively training such ML models is critical to maximizing detection accuracy and computational efficiency. However, the efficiency of these systems degrades in high-dimensional data spaces, and it is crucial to have a suitable feature extraction method to eliminate extraneous data from the classification procedure. The detection accuracy and false positive rate of many ML-based IDSs also rise when the samples used to train the models are unbalanced. This study provides a detailed overview of the UNSW-NB15(DS-1) and NF-UNSWNB15(DS-2) datasets for intrusion detection, which will be utilized to develop and evaluate our models. In addition, this model uses the MaxAbsScaler algorithm to implement a filter-based feature scaling strategy . Then, use the condensed feature set to perform several ML techniques, including Support Vector Machines (SVM), K-nearest neighbors (KNN), Logistic Regression (LR), Naive Bayes (NB), Decision Tree (DT), and Random Forest (RF), considering multiclass classification. Accuracy tests for the multiclass classification scheme were improved from 60% to 94% using the MaxAbsScaler-based feature scaling method.