Machine Learning Models and Explainable Artificial Intelligence Approaches for Intrusion Detection in IoT Networks

The rapid spread of Internet of Things (IoT) technologies and the rapidly increasing use of IoT devices offer technological transformation and innovative solutions in many areas from daily life to industrial processes. However, the resource constraints, simple operating systems, non-standard protocols and embedded software of IoT devices make them vulnerable to cyber-attacks. This makes IoT networks risky against malicious attacks and increases the size of security threats. Moreover, the complexity and heterogeneity of IoT networks render traditional security approaches inadequate and increase the need for advanced solutions. In this context, the need for methods for detecting and preventing attacks on IoT networks that are not only reliable and effective, but also understandable by users and security experts has become increasingly critical. This need for network security necessitates the development of strategies that will both secure technical infrastructures and increase the trust of human elements interacting with these infrastructures. In this context, the need for more interpretable, explainable and transparent security approaches is increasing. In particular, machine learning (ML) and deep learning (DL) based intrusion detection systems offer effective solutions to security problems such as anomaly detection and attack classification. The comprehensibility of the decision mechanisms of the models used enables both security experts to manage the systems more effectively and users to have more confidence in the security measures taken. Explainable Artificial Intelligence (XAI) techniques make the decision processes of ML and DL models transparent, allowing to understand how and why attacks are detected. Accordingly, it has become a critical requirement for security systems not only to achieve high accuracy rates, but also to make the decisions taken interpretable. In this study, the effectiveness of artificial intelligence (ML and DL) techniques for the detection and classification of security threats in IoT networks is analysed. In addition, the applications of XAI methods such as SHapley Additive exPlanations (SHAP), Local Interpretable Model-Agnostic Explanations (LIME) and Explain Like I'm 5 (ELI5) for IoT security are investigated. It is shown how these methods make the decision processes of ML and DL models used in IoT networks more transparent and provide a better analysis. As a result, this study presents an approach that combines both performance and explainability in IoT security. By demonstrating the effectiveness of XAI-supported ML and DL models, it aims to contribute to future research and innovative security solutions for enhancing security in IoT networks.