WeiDetect: Weibull Distribution-Based Defense against Poisoning Attacks in Federated Learning for Network Intrusion Detection Systems

• URL: http://arxiv.org/abs/2504.04367v2
• Date: Sat, 19 Apr 2025 15:07:05 GMT
• Title: WeiDetect: Weibull Distribution-Based Defense against Poisoning Attacks in Federated Learning for Network Intrusion Detection Systems
• Authors: Sameera K. M., Vinod P., Anderson Rocha, Rafidha Rehiman K. A., Mauro Conti,
• Abstract summary: We propose WeiDetect, a two-phase, server-side defense mechanism for FL-based NIDS that detects malicious participants.<n>We conducted experiments to evaluate the effectiveness of our approach in diverse attack settings.<n>Our findings highlight that WeiDetect outperforms state-of-the-art defense approaches.
• Score: 23.03944479383518
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In the era of data expansion, ensuring data privacy has become increasingly critical, posing significant challenges to traditional AI-based applications. In addition, the increasing adoption of IoT devices has introduced significant cybersecurity challenges, making traditional Network Intrusion Detection Systems (NIDS) less effective against evolving threats, and privacy concerns and regulatory restrictions limit their deployment. Federated Learning (FL) has emerged as a promising solution, allowing decentralized model training while maintaining data privacy to solve these issues. However, despite implementing privacy-preserving technologies, FL systems remain vulnerable to adversarial attacks. Furthermore, data distribution among clients is not heterogeneous in the FL scenario. We propose WeiDetect, a two-phase, server-side defense mechanism for FL-based NIDS that detects malicious participants to address these challenges. In the first phase, local models are evaluated using a validation dataset to generate validation scores. These scores are then analyzed using a Weibull distribution, identifying and removing malicious models. We conducted experiments to evaluate the effectiveness of our approach in diverse attack settings. Our evaluation included two popular datasets, CIC-Darknet2020 and CSE-CIC-IDS2018, tested under non-IID data distributions. Our findings highlight that WeiDetect outperforms state-of-the-art defense approaches, improving higher target class recall up to 70% and enhancing the global model's F1 score by 1% to 14%.

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