European Journal of Computer Science and Information Technology (EJCSIT)

Fraud Detection

Federated Learning-Based Hybrid Model for Secure Fraud Detection in Distributed Rural Environments (Published)

Accurate and efficient detection of fraudulent financial transactions is essential for ensuring security, trust, and stability in modern digital financial systems. However, this task remains challenging due to highly imbalanced datasets, continuously evolving fraud strategies, heterogeneous data distributions across different financial institutions, and strict privacy constraints in distributed environments. To address these challenges, this research proposes a federated learning-based hybrid deep learning model for fraud detection across distributed rural financial environments. The evaluation was conducted using the Credit Card Fraud Detection Dataset (CCFD), which comprises 284,807 financial transactions with 492 fraudulent transactions. This dataset is severely skewed between valid and fraudulent classes. To mitigate class imbalance, the Synthetic Minority Oversampling Technique (SMOTE) was applied during preprocessing to improve the representation of minority fraud samples and enhance model learning capability. The proposed Pity Beetle Algorithm- driven Federated-tuned Recurrent Neural Networks (PBA-FederatedRNN) model integrates Recurrent Neural Networks (RNNs) for sequential transaction behavior learning and the Pity Beetle Algorithm (PBA) for optimized parameter tuning and faster convergence. Federated learning ensures robust data security and privacy preservation by allowing several financial nodes to cooperatively train a global model without exchanging raw data. The model was implemented using Python with TensorFlow/PyTorch in a distributed simulation environment. According to experimental results, the proposed model outperforms existing centralized and federated approaches with 97.8% recall, 98.0% F1-score, 98.7% accuracy, and 98.2% precision. With all factors considered, the proposed PBA-FederatedRNN model offers a flexible, dependable, and highly efficient fraud detection solution in distributed financial systems that protect privacy.

Keywords: Fraud Detection, distributed systems, federated learning, hybrid model, privacy preservation, rural environments, secure aggregation

Real-Time Fraud in Real-Time Rails: AI-Driven Detection Frameworks for Protecting Small Business Payments (Published)

The rapid proliferation of Real-Time Payment (RTP) rails — including The Clearing House’s RTP® network and the Federal Reserve’s FedNow® Service — has fundamentally transformed the payments landscape for small and medium-sized businesses (SMBs), enabling instant, irrevocable fund transfers 24/7/365. However, this same immediacy eliminates the settlement windows upon which traditional batch-based fraud detection systems rely, creating a critical security gap. In 2024, RTP processed 343 million transactions valued at $246 billion, a 94% year-over-year increase, while fraud losses on instant rails are projected to exceed $12 billion by 2025. SMBs are disproportionately vulnerable, with Business Email Compromise (BEC) alone accounting for 38% of RTP-based fraud targeting small businesses. This study proposes, evaluates, and validates an AI-Driven Fraud Detection Framework (AI-RTPF) tailored specifically to SMB transaction patterns on real-time rails. Leveraging a hybrid architecture combining Long Short-Term Memory (LSTM) networks, Graph Neural Networks (GNNs), and Isolation Forest anomaly detection — scored and decisioned in under 50 milliseconds — the proposed framework achieves 95.5% recall, 96.0% precision, and an AUC-ROC of 0.978, outperforming all baseline models while reducing false positive rates to 4.2%, down from 18.2% in conventional rule-based systems. Findings demonstrate that ISO 20022 rich data enrichment and behavioral baseline modeling are critical enablers of pre-authorization fraud interception in SMB payment contexts. Implications for banking technology design, regulatory compliance, and SMB financial inclusion are discussed.

Keywords: Artificial Intelligence, FedNow, Fraud Detection, ISO 20022, Small Business, behavioral analytics, graph neural networks, machine learning, payment security, real-time payments (RTP)

Technical Review: Cloud-Native Payment Processing Platform (Published)

The evolution of digital commerce has driven the transformation from traditional monolithic payment systems toward cloud-native architectures that deliver superior scalability, resilience, and operational efficiency. This technical review examines a comprehensive cloud-native payment processing platform designed to address the fundamental limitations of legacy payment infrastructure through distributed microservices architectures, containerization, and event-driven design patterns. The platform addresses critical business challenges, including transaction volume volatility, multi-channel payment diversity, and regulatory compliance across multiple jurisdictions. Key architectural components include API gateways for secure entry points, service mesh integration for enhanced communication, hybrid SQL/NoSQL data strategies, and sophisticated fraud detection capabilities powered by machine learning algorithms. Implementation features encompass multi-channel payment support spanning cards, wallets, bank transfers, and cryptocurrency, real-time fraud scoring services, automated chargeback handling, and modern DevOps deployment strategies utilizing GitOps principles. The platform delivers substantial operational benefits, including vendor independence, geographic scalability, enhanced resilience during peak traffic events, and significant cost reductions through dynamic resource allocation. Competitive positioning advantages emerge through technical differentiation, market responsiveness, and improved customer trust metrics. Risk considerations include complexity management challenges, integration requirements with existing systems, and ongoing regulatory compliance maintenance. The platform represents a paradigm shift, enabling financial institutions, fintech companies, and e-commerce platforms to achieve superior performance while maintaining competitive advantages in the dynamic digital payments landscape.

Keywords: Fraud Detection, Microservices architecture, cloud-native payment systems, digital payment processing, financial technology infrastructure

AI-Driven Fraud Detection Models in Cloud-Based Banking Ecosystems: A Comprehensive Analysis (Published)

The digital transformation of banking services has fundamentally altered the financial fraud landscape, creating sophisticated threats that traditional rule-based security systems cannot adequately address. Contemporary fraudulent activities leverage advanced technologies, including synthetic identity creation, real-time social engineering attacks, and deepfake-enabled deceptions to exploit vulnerabilities in digital banking infrastructures. Conventional fraud detection mechanisms demonstrate critical limitations through static architectures, inability to adapt to novel fraud patterns, excessive false positive rates, and scalability constraints that compromise effectiveness in high-velocity transaction environments. Cloud-native infrastructures provide essential foundations for advanced fraud detection through elastic scalability mechanisms, real-time data streaming technologies, and seamless integration of external intelligence sources. AI-powered fraud detection models represent a paradigm shift toward adaptive security frameworks, incorporating ensemble learning methodologies, deep neural networks, and real-time inference capabilities that enable instantaneous transaction evaluation. Machine learning algorithms deployed within cloud environments can process vast transactional datasets simultaneously, identifying subtle correlations and behavioral patterns impossible to detect through manual processes or traditional systems. Performance evaluation demonstrates superior detection accuracy through precision, recall, and F1-score metrics while maintaining model interpretability and regulatory compliance requirements. The integration of artificial intelligence with cloud-native infrastructure creates comprehensive fraud detection ecosystems that evolve alongside emerging threat vectors, ensuring continuous protection against sophisticated financial crimes in modern banking environments.

Keywords: Artificial Intelligence, Cloud-Native Infrastructure, Fraud Detection, financial security, machine learning

Streaming Data Pipelines and AI-Driven Cleansing: A Financial Institution’s Journey to Enhanced Risk Assessment (Published)

Financial institutions face mounting challenges in processing vast transactional datasets while maintaining regulatory compliance and detecting fraudulent activities. This article examines how a global banking enterprise implemented an integrated data architecture utilizing AWS Aurora and Redshift to consolidate disparate transactional systems. The implementation resulted in significant reduction of risk assessment timeframes while enhancing analytical capabilities. Apache Kafka-powered streaming pipelines provided the foundation for real-time fraud detection mechanisms, seamlessly supporting compliance monitoring across multiple jurisdictions. The migration process incorporated AI-driven data cleansing protocols to maintain data integrity and ensure analytical accuracy. Particularly noteworthy was the development of scalable analytical models designed specifically to process volatile market data during periods of financial uncertainty. The architectural solutions described demonstrate how strategic data engineering investments enable financial institutions to navigate complex regulatory landscapes while simultaneously improving operational efficiency. These findings contribute to understanding how modern data infrastructure can transform risk assessment capabilities in the financial services sector.

 

Keywords: AWS aurora, Apache Kafka, Financial data engineering, Fraud Detection, regulatory compliance, risk analytics

AI in Insurance: Transforming Fraud Detection and Claims Processing through Salesforce Integration (Published)

The insurance industry is experiencing a profound transformation through artificial intelligence integration, particularly in fraud detection and claims processing operations. This article delves into how Salesforce Einstein serves as a pivotal platform for implementing AI solutions that address longstanding challenges in insurance workflows. Insurers face substantial financial losses from fraudulent claims and operational inefficiencies in claims handling, creating opportunities for technological innovation to drive competitive differentiation. Through the synergistic combination of sophisticated AI algorithms and Salesforce’s customer relationship management infrastructure, insurance providers can simultaneously enhance fraud detection accuracy and accelerate legitimate claims processing. The evolution of insurance operations has progressed from basic automation to advanced cognitive technologies, with Einstein’s capabilities spanning predictive analytics, natural language processing, and automated decision support. These technologies enable insurers to detect complex fraud patterns through both supervised and unsupervised machine learning techniques while streamlining claims workflows through intelligent automation. Document processing capabilities extract crucial information from submitted materials with remarkable precision, while comprehensive customer data integration facilitates personalized experiences. The resulting operational improvements include dramatic reductions in claims cycle times, decreased processing costs, enhanced payment accuracy, and significantly higher customer satisfaction scores. This technological paradigm shift ultimately creates more secure, responsive insurance systems that benefit both providers and policyholders, enabling insurers to maintain competitive advantages in an increasingly complex marketplace.

Keywords: Artificial Intelligence, Claims Automation, Fraud Detection, Salesforce Einstein, insurance technology, machine learning

AI in Insurance Claims Processing: Balancing Innovation with Implementation Challenges (Published)

This article explores the multifaceted implementation of artificial intelligence in insurance claims processing, examining both transformative successes and persistent challenges. It analyzes how AI technologies automate workflows, enhance fraud detection capabilities, improve customer interactions, reduce processing errors, and accelerate claim settlements. The discussion extends to critical implementation barriers, including legacy system integration difficulties, algorithmic bias concerns, resource constraints for smaller insurers, model explainability issues, and regulatory compliance challenges. By providing a balanced technical assessment of current applications alongside practical solutions for common obstacles, this article offers insurance professionals a comprehensive framework for navigating AI adoption decisions while maintaining ethical standards and stakeholder trust.

Keywords: Fraud Detection, algorithmic transparency, claims processing, ethical AI, insurance automation

Real-Time Data Streaming: Transforming FinTech Through Modern Data Architectures (Published)

This comprehensive article explores the transformative impact of real-time data streaming technologies in the financial services sector through four detailed case studies. It examines how leading financial institutions have leveraged modern data architectures, including Apache Kafka, Spark Streaming, AWS Kinesis, and cloud computing platforms, to address critical business challenges. The article demonstrates how these technologies enable instantaneous fraud detection, enhanced customer experience through personalized offerings, streamlined regulatory reporting, and optimized customer acquisition strategies. Throughout the analysis, the article highlights implementation challenges, technical considerations, and valuable lessons learned, providing essential insights for financial organizations seeking to modernize their data infrastructure and maintain a competitive advantage in an increasingly real-time business environment.   

Keywords: Cloud Computing, Fraud Detection, customer analytics, financial technology, real-time data streaming

Cloud-Native API Strategies for Financial Services: Ensuring Security, Compliance, and Scalability (Published)

This comprehensive article examines the transformation of financial services through cloud-native API architectures, focusing on implementation strategies across banking, fintech, and insurance sectors. The article investigates the evolution of security frameworks, regulatory compliance mechanisms, and scalability patterns in cloud-native environments. Through detailed articles, real-time payment processing systems, fraud detection capabilities, and multi-layer security architectures, the article demonstrates how financial institutions leverage microservices, API gateways, and hardware security modules to enhance operational efficiency while maintaining robust security measures. The article explores the integration of artificial intelligence in fraud detection, regulatory technology for compliance automation, and resilience patterns for fault tolerance. Additionally, it examines the impact of open banking standards, cross-border payment processing, and data protection frameworks on the financial services ecosystem.

 

Keywords: Cloud-Native Architecture, Fraud Detection, financial services API, payment processing, regulatory technology, security implementation

Machine Learning for Core Banking System Anomaly Detection: From Batch to Stream Processing (Published)

This article examines the evolution of anomaly detection techniques in core banking systems, transitioning from traditional batch processing to modern stream processing approaches powered by machine learning. We explore how financial institutions have historically addressed fraud detection and system vulnerabilities, and detail the significant paradigm shift toward real-time analysis. The paper presents empirical evidence of increased detection efficiency, reduced false positives, and enhanced security posture in banking environments. Through case studies, technical implementations, and quantitative analysis, we demonstrate how stream processing architectures leveraging ML algorithms provide superior protection for modern banking infrastructure compared to conventional methods.

Keywords: Fraud Detection, anomaly detection, core banking systems, machine learning, stream processing

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