arXiv AI

A Gradient-Optimized TSK Fuzzy Framework for Explainable Phishing Detection

A novel phishing URL detection system is introduced that employs a first-order Takagi-Sugeno-Kang (TSK) fuzzy inference model optimized via gradient-based techniques, specifically using the Adam optimizer. The framework combines fuzzy logic’s interpretability with gradient optimization’s precision, achieving an average accuracy of 99.95% and a perfect AUC of 1.00 across 5 cross-validation folds on a dataset of over 235,000 URLs. The optimized fuzzy rules and membership functions provide clear decision pathways, enhancing transparency for cybersecurity applications.

arXiv AI
Sep 10

CoGReV: A Confidence-Gated Post-Hoc Non-Monotonic Belief Revision Framework for Phishing Website Classification

CoGReV is a hybrid framework that enhances machine‑learning phishing classifiers with a post‑hoc, non‑monotonic reasoning layer written in Answer Set Programming. It uses a confidence‑gated defeasible rule to revise low‑confidence phishing predictions toward legitimate only when website metadata is available, thereby allocating uncertain decisions to the reasoning layer while leaving confident ones to the classifier. The gated rule reduces false positives by 0.27 % of decisions and maintains recall within 0.7 % of the baseline, operating in linear time.

By Mainak Sen, Kumar Sankar Ray, Amlan Chakrabarti
arXiv Machine Learning
Oct 23

Bridging the Closed-World Gap: Interpretable Anomaly Detection via a Hybrid TSK-FCM Ensemble on the BETH Dataset

The paper introduces a Hybrid Fuzzy Ensemble that combines a gradient‑optimized Takagi‑Sugeno‑Kang (TSK) fuzzy classifier with a parallel Fuzzy C‑Means (FCM) module to address the closed‑world gap in anomaly detection on the BETH dataset. It replaces traditional fuzzy membership scores with a robust Min Distance metric to mitigate the curse of dimensionality, achieving a state‑of‑the‑art AUROC of 0.9951 and outperforming Isolation Forest by 17.1%. The approach delivers near‑perfect out‑of‑distribution detection while maintaining interpretability through fuzzy logic.

By Lohith Srikanth Pentapalli, Josette Riep, Justin Ouwerkerk, Kelly Cohen
arXiv Machine Learning
Sep 18

AURA: Adaptive Uncertainty-Routed Analysis for Email Threat Detection

AURA: Adaptive Uncertainty-Routed Analysis for Email Threat Detection is a multimodal system that evaluates both email content and embedded URLs to detect spam and phishing. It uses a two-layer approach: first, a URL classifier estimates prediction uncertainty, and only messages with high uncertainty are passed to a fine-tuned transformer encoder for deeper semantic analysis. Evaluated on eight diverse training corpora and two real-world datasets covering a decade of attacks, AURA achieves a macro F1-score of 0.9858 in-distribution and maintains scores above 0.94 on the NazPhish-Eval and GuenterTrap-Eval datasets, demonstrating strong generalization to new attack scenarios.

By Omran Berjawi, Walid fahs, Rida Khatoun
arXiv AI
Oct 27

A Computer Vision Approach to Visual Fraud Detection in Phishing Websites Using YOLOv8

The paper presents a visual phishing detection system that treats rendered webpages as images, using a YOLOv8 convolutional neural network to classify full-page screenshots as phishing or legitimate. It achieves 92% accuracy, processes a screenshot in about 100 ms, and reduces false positives by 11% after targeted data augmentation. The authors detail dataset creation, augmentation, model architecture, training, and discuss how this visual approach complements existing URL- and content-based defenses.

By Basil Sajid Shaikh