Journal
SENSORS
Volume 19, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s19010203
Keywords
wireless sensor networks; intrusion detection; class imbalance; SMOTE; random forest
Funding
- Natural Science Foundation of Hunan Province [2018JJ3607]
- National Natural Science Foundation of China [51575517]
- National Technology Foundation Project [181GF22006]
- Frontier Science and Technology Innovation Project in the National Key Research and Development Program [2016QY11W2003]
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With the wide application of wireless sensor networks in military and environmental monitoring, security issues have become increasingly prominent. Data exchanged over wireless sensor networks is vulnerable to malicious attacks due to the lack of physical defense equipment. Therefore, corresponding schemes of intrusion detection are urgently needed to defend against such attacks. Considering the serious class imbalance of the intrusion dataset, this paper proposes a method of using the synthetic minority oversampling technique (SMOTE) to balance the dataset and then uses the random forest algorithm to train the classifier for intrusion detection. The simulations are conducted on a benchmark intrusion dataset, and the accuracy of the random forest algorithm has reached 92.39%, which is higher than other comparison algorithms. After oversampling the minority samples, the accuracy of the random forest combined with the SMOTE has increased to 92.57%. This shows that the proposed algorithm provides an effective solution to solve the problem of class imbalance and improves the performance of intrusion detection.
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