Resampling Imbalanced Network Intrusion Datasets to Identify Rare Attacks

Sikha Bagui (), Dustin Mink, Subhash Bagui, Sakthivel Subramaniam and Daniel Wallace
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Sikha Bagui: Department of Computer Science, University of West Florida, Pensacola, FL 32514, USA
Dustin Mink: Department of Computer Science, University of West Florida, Pensacola, FL 32514, USA
Subhash Bagui: Department of Mathematics and Statistics, University of West Florida, Pensacola, FL 32514, USA
Sakthivel Subramaniam: Department of Computer Science, University of West Florida, Pensacola, FL 32514, USA
Daniel Wallace: Department of Computer Science, University of West Florida, Pensacola, FL 32514, USA

Future Internet, 2023, vol. 15, issue 4, 1-24

Abstract: This study, focusing on identifying rare attacks in imbalanced network intrusion datasets, explored the effect of using different ratios of oversampled to undersampled data for binary classification. Two designs were compared: random undersampling before splitting the training and testing data and random undersampling after splitting the training and testing data. This study also examines how oversampling/undersampling ratios affect random forest classification rates in datasets with minority dataor rare attacks. The results suggest that random undersampling before splitting gives better classification rates; however, random undersampling after oversampling with BSMOTE allows for the use of lower ratios of oversampled data.

Keywords: imbalanced data; resampling; rare attacks; network intrusion datasets; minority data; oversampling; BSMOTE; random undersampling; random forest (search for similar items in EconPapers)
JEL-codes: O3 (search for similar items in EconPapers)
Date: 2023
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