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In this research, a comparative study of four Quantum Machine Learning (QML) models was conducted for fraud detection in finance. We proved that the Quantum Support Vector Classifier model achieved the highest performance, with F1 scores of…

Quantum Physics · Physics 2023-11-28 Nouhaila Innan , Muhammad Al-Zafar Khan , Mohamed Bennai

This study investigates fraud detection in ride hailing platforms through Graph Neural Networks (GNNs),focusing on the effectiveness of various models. By analyzing prevalent fraudulent activities, the research highlights and compares the…

Among the various types of cyberattacks, identifying zero-day attacks is problematic because they are unknown to security systems as their pattern and characteristics do not match known blacklisted attacks. There are many Machine Learning…

Cryptography and Security · Computer Science 2025-12-09 Zahra Lotfi , Mostafa Lotfi

The innovative GNN-CL model proposed in this paper marks a breakthrough in the field of financial fraud detection by synergistically combining the advantages of graph neural networks (gnn), convolutional neural networks (cnn) and long…

Machine Learning · Computer Science 2024-07-10 Yu Cheng , Junjie Guo , Shiqing Long , You Wu , Mengfang Sun , Rong Zhang

The growing integration of drones into civilian, commercial, and defense sectors introduces significant cybersecurity concerns, particularly with the increased risk of network-based intrusions targeting drone communication protocols.…

Cryptography and Security · Computer Science 2025-12-24 Md. Alamgir Hossain , Waqas Ishtiaq , Md. Samiul Islam

Large language model (LLM) unlearning has demonstrated its essential role in removing privacy and copyright-related responses, crucial for their legal and safe applications. However, the pursuit of complete unlearning often comes with…

Machine Learning · Computer Science 2025-06-06 Yue Wang , Qizhou Wang , Feng Liu , Wei Huang , Yali Du , Xiaojiang Du , Bo Han

This study proposes a credit card fraud detection method based on Heterogeneous Graph Neural Network (HGNN) to address fraud in complex transaction networks. Unlike traditional machine learning methods that rely solely on numerical features…

Machine Learning · Computer Science 2025-04-14 Qiuwu Sha , Tengda Tang , Xinyu Du , Jie Liu , Yixian Wang , Yuan Sheng

In the context of globalization and the rapid expansion of the digital economy, anti-money laundering (AML) has become a crucial aspect of financial oversight, particularly in cross-border transactions. The rising complexity and scale of…

Machine Learning · Computer Science 2024-12-11 Qian Yu , Zhen Xu , Zong Ke

Detecting fraud and corruption in public procurement remains a major challenge for governments worldwide. Most research to-date builds on domain-knowledge-based corruption risk indicators of individual contract-level features and some also…

Machine Learning · Computer Science 2025-12-29 Martí Medina-Hernández , Janos Kertész , Mihály Fazekas

With the proliferation of various online and mobile payment systems, credit card fraud has emerged as a significant threat to financial security. This study focuses on innovative applications of the latest Transformer models for more robust…

Machine Learning · Computer Science 2024-11-13 Chang Yu , Yongshun Xu , Jin Cao , Ye Zhang , Yinxin Jin , Mengran Zhu

This study investigates the efficacy of machine learning models in network security threat detection through the critical lens of partial versus complete flow information, addressing a common gap between research settings and real-time…

Machine Learning · Computer Science 2025-07-01 Adrian Pekar , Richard Jozsa

Card transaction fraud is a growing problem affecting card holders worldwide. Financial institutions increasingly rely upon data-driven methods for developing fraud detection systems, which are able to automatically detect and block…

Applications · Statistics 2020-05-07 Sebastiaan Höppner , Bart Baesens , Wouter Verbeke , Tim Verdonck

In the age of digital finance, detecting fraudulent transactions and money laundering is critical for financial institutions. This paper presents a scalable and efficient solution using Big Data tools and machine learning models. We utilize…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-04 Chen Liu , Hengyu Tang , Zhixiao Yang , Ke Zhou , Sangwhan Cha

The application of machine learning to support the processing of large datasets holds promise in many industries, including financial services. However, practical issues for the full adoption of machine learning remain with the focus being…

Machine Learning · Computer Science 2021-05-14 Ismini Psychoula , Andreas Gutmann , Pradip Mainali , S. H. Lee , Paul Dunphy , Fabien A. P. Petitcolas

Anomaly detection is a critical challenge across various research domains, aiming to identify instances that deviate from normal data distributions. This paper explores the application of Generative Adversarial Networks (GANs) in fraud…

Machine Learning · Computer Science 2024-02-16 Mengran Zhu , Yulu Gong , Yafei Xiang , Hanyi Yu , Shuning Huo

We present a novel hybrid quantum-classical neural network architecture for fraud detection that integrates a classical Long Short-Term Memory (LSTM) network with a variational quantum circuit. By leveraging quantum phenomena such as…

Quantum Physics · Physics 2025-05-02 Rushikesh Ubale , Sujan K. K. , Sangram Deshpande , Gregory T. Byrd

Financial fraud detection has emerged as a critical research challenge amid the rapid expansion of digital financial platforms. Although machine learning approaches have demonstrated strong performance in identifying fraudulent activities,…

Machine Learning · Computer Science 2026-03-13 Mohammad Shihab Uddin , Md Hasibul Amin , Nusrat Jahan Ema , Bushra Uddin , Tanvir Ahmed , Arif Hassan Zidan

Class imbalance problems manifest in domains such as financial fraud detection or network intrusion analysis, where the prevalence of one class is much higher than another. Typically, practitioners are more interested in predicting the…

Machine Learning · Statistics 2017-11-16 Peter Xenopoulos

Credit card fraud incurs a considerable cost for both cardholders and issuing banks. Contemporary methods apply machine learning-based classifiers to detect fraudulent behavior from labeled transaction records. But labeled data are usually…

Machine Learning · Computer Science 2024-12-25 Sheng Xiang , Mingzhi Zhu , Dawei Cheng , Enxia Li , Ruihui Zhao , Yi Ouyang , Ling Chen , Yefeng Zheng

There is a growing demand for explainable, transparent, and data-driven models within the domain of fraud detection. Decisions made by fraud detection models need to be explainable in the event of a customer dispute. Additionally, the…

Machine Learning · Computer Science 2023-12-04 Samantha Visbeek , Erman Acar , Floris den Hengst