Integrating SMOTE and Heterogeneous Ensemble Methods for Online FraudDetection
subject: K-Nearest Neighbors; Machine learning; Random Forest; SMOTE; XGBoost
description: In the continuous evolving digital era, the escalation of online fraud demands a robust and efficient mechanism for its detection and prevention. In the recent years there has been a significant increase in the online bank transactions. The research delves into the integration of different machine learning algorithms and to enhance the models adaptability, Synthetic Minority Oversampling Technique (SMOTE) has been utilized. The approach addresses the challenges of data imbalance and also strengthens the overall detection performance. Through an extensive literature review the study highlights the limitations in the existing issues in online financial fraud. The proposed model employs a heterogeneous ensemble model consisting of K-Nearest Neighbors (KNN), Random Forest, and XGBoost. KNN functions as an anomaly detector, identifying irregularities in transactional data. Simultaneously, Random Forest assesses feature significance and detects intricate patterns, contributing to a comprehensive understanding of fraudulent activity. XGBoost, known for its computational efficiency, ensures real-time responsiveness by adapting to emerging fraud tactics. The system also introduces a soft voting mechanism that seamlessly integrates individual algorithm predictions, resulting in a robust and highly accurate ensemble fraud detection system. Validation on an authentic bank fraud dataset underscores the framework's prowess, showcasing superior fraud detection capabilities and a significant reduction in false positives. The purpose of adopting this approach is to enhance the financial security and safeguard the consumers assets. The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
creator: Srivastava, Shilpa; Patni, Niharika; Singh, Meenu; Pant, Millie; Snl, Vlav
source: Smart Innovation, Systems and Technologies;Volume;445 SIST;pp.15-28
publisher: Springer Science and Business Media Deutschland GmbH
date: 01-01-2026
rights: Restricted Access; Hardcopy may be available in the library
relation: ISSN: 21903018; ISBN: 978-981967276-9;
language: English
type: Conference paper
coverage: Srivastava S., Christ University, Bengaluru, India; Patni N., IMT Ghaziabad, Ghaziabad, India; Singh M., Department of Computer Science, VB-Technical University of Ostrava, Ostrava, Czech Republic; Pant M., Department of Applied Mathematics and Scientific Computing, Indian Institute of Technology, Uttarakhand, Roorkee, India, Mehta Family School of Data Science and Artificial Intelligence, Indian Institute of Technology, Uttarakhand, Roorkee, India; Snl V., Department of Computer Science, VB-Technical University of Ostrava, Ostrava, Czech Republic