arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.02097cs.LGcs.AI
收藏

PLC过程控制中异常检测的无监督包围方法

Unsupervised Ensemble Methods for Anomaly Detection in PLC-based Process Control

Tennessee Technological University(田纳西理工大学)

Emmanuel Aboah Boateng, Bruce J. W

摘要:

基于可编程逻辑控制器(PLC)的工业控制系统(ICS)用于监视和控制关键基础设施。ICS中通信网络和物联网方法的集成增加了ICS对网络攻击的脆弱性。这项工作提出了新的无监督机器学习集成方法异常检测在基于PLC的ICS。这项工作提出了两种广泛的异常检测方法:加权投票集成方法与学习算法的基础上确定系数和堆叠为基础的集成方法,使用隔离森林元检测器。通过一个开源的基于PLC的ICS受到多种攻击场景作为案例研究的两个集成方法进行了分析。这项工作考虑了四种不同的学习模型的加权投票集成方法。比较性能分析的五个集成方法驱动的不同基地检测器。结果表明,基于堆栈集成方法使用隔离森林元检测器实现了优越的性能,以前的工作的所有性能指标。结果还表明,有效的无监督集成方法,例如具有隔离森林元检测器的基于堆栈的集成,可以鲁棒地检测任意ICS数据集中的异常。最后,所提出的结果进行了验证,通过使用统计假设检验。

英文摘要:

Programmable logic controller (PLC) based industrial control systems (ICS) are used to monitor and control critical infrastructure. Integration of communication networks and an Internet of Things approach in ICS has increased ICS vulnerability to cyber-attacks. This work proposes novel unsupervised machine learning ensemble methods for anomaly detection in PLC-based ICS. The work presents two broad approaches to anomaly detection: a weighted voting ensemble approach with a learning algorithm based on coefficient of determination and a stacking-based ensemble approach using isolation forest meta-detector. The two ensemble methods were analyzed via an open-source PLC-based ICS subjected to multiple attack scenarios as a case study. The work considers four different learning models for the weighted voting ensemble method. Comparative performance analyses of five ensemble methods driven diverse base detectors are presented. Results show that stacking-based ensemble method using isolation forest meta-detector achieves superior performance to previous work on all performance metrics. Results also suggest that effective unsupervised ensemble methods, such as stacking-based ensemble having isolation forest meta-detector, can robustly detect anomalies in arbitrary ICS datasets. Finally, the presented results were validated by using statistical hypothesis tests.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑