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Keywords = anti-money laundering

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22 pages, 441 KB  
Article
Blockchain Forensics and Regulatory Technology for Crypto Tax Compliance: A State-of-the-Art Review and Emerging Directions in the South African Context
by Pardon Takalani Ramazhamba and Hein Venter
Appl. Sci. 2026, 16(2), 799; https://doi.org/10.3390/app16020799 - 13 Jan 2026
Viewed by 94
Abstract
The rise in Blockchain-based digital assets has transformed the financial ecosystems, which has also created complex governance and taxation challenges. The pseudonymous and cross-border nature of crypto transactions undermines traditional tax enforcement, leaving regulators such as the South African Revenue Service (SARS) reliant [...] Read more.
The rise in Blockchain-based digital assets has transformed the financial ecosystems, which has also created complex governance and taxation challenges. The pseudonymous and cross-border nature of crypto transactions undermines traditional tax enforcement, leaving regulators such as the South African Revenue Service (SARS) reliant on voluntary disclosures with limited verification mechanisms, while existing Blockchain forensic tools and regulatory technologies (RegTechs) have advanced in anti-money laundering and institutional compliance, their integration into issues related to taxpayer compliance and locally adapted solutions remains underdeveloped. Therefore, this study conducts a state-of-the-art review of Blockchain forensics, RegTech innovations, and crypto tax frameworks to identify gaps in the crypto tax compliance space. Then, this study builds on these insights and proposes a conceptual model that integrates digital forensics, cost basis automation aligned with SARS rules, wallet interaction mapping, and non-fungible tokens (NFTs) as verifiable audit anchors. The contributions of this study are threefold: theoretically, which reconceptualise the adoption of Blockchain forensics as a proactive compliance mechanism; practically, it conceptualises a locally adapted proof-of-concept for diverse transaction types, including DeFi and NFTs; and lastly, innovatively, which introduces NFTs to enhance auditability, trust, and transparency in digital tax compliance. Full article
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27 pages, 1186 KB  
Article
Legal Dimensions of Global AML Risk Assessment: A Machine Learning Approach
by Olha Kovalchuk, Ruslan Shevchuk, Serhiy Banakh, Nataliia Holota, Mariana Verbitska and Oleksandra Lutsiv
Risks 2026, 14(1), 5; https://doi.org/10.3390/risks14010005 - 3 Jan 2026
Viewed by 513
Abstract
Money laundering poses a serious threat to financial stability and requires effective national frameworks for prevention. This study investigates how the quality of legal and institutional frameworks affects the effectiveness of national anti-money laundering (AML) systems and their implications for financial risk management. [...] Read more.
Money laundering poses a serious threat to financial stability and requires effective national frameworks for prevention. This study investigates how the quality of legal and institutional frameworks affects the effectiveness of national anti-money laundering (AML) systems and their implications for financial risk management. We conducted an empirical analysis of 132 jurisdictions in 2024 using the Basel AML Index (AMLI) and the WJP Rule of Law Index (RLI). The Random Forest method was employed to model the relationship between rule-of-law indicators and AML risk levels. Findings reveal a significant inverse relationship between rule-of-law indicators and AML risk levels, with an overall classification accuracy of 69.6%. The model performed best for low-risk countries (precision 75%, recall 92.31%), moderately for medium-risk countries (precision 65.22%, recall 78.95%), but failed to identify high-risk jurisdictions, suggesting a legal institutional “threshold” necessary for effective AML functioning. Key predictors included protection of fundamental rights and mechanisms for civil oversight, with strong negative correlations between AML risk and criminal justice impartiality (−0.35), civil justice fairness (−0.35), and equality before the law (−0.41). These results show that legal factors strongly affect AML risk and can guide regulators in improving risk-based standards, enhancing regulatory certainty, and managing financial risk. Full article
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30 pages, 513 KB  
Article
From Placement to Integration: A Parametric Study of Cryptocurrency-Based Money Laundering Techniques
by Hugo Almeida, Pedro Pinto and Ana Fernández Vilas
Risks 2025, 13(12), 249; https://doi.org/10.3390/risks13120249 - 11 Dec 2025
Viewed by 543
Abstract
The widespread adoption of cryptocurrencies has transformed the financial landscape by enabling swift, decentralised transactions. However, the pseudonymous nature of digital currencies has also fuelled illicit activities, such as money laundering. Criminals perform money laundering to access illicitly acquired funds without detection and [...] Read more.
The widespread adoption of cryptocurrencies has transformed the financial landscape by enabling swift, decentralised transactions. However, the pseudonymous nature of digital currencies has also fuelled illicit activities, such as money laundering. Criminals perform money laundering to access illicitly acquired funds without detection and convert illegally obtained assets into untraceable commodities, seamlessly integrated into the financial system. Although new regulatory measures have been introduced, illicit actors continue to exploit various methods, from peer-to-peer exchanges to cryptocurrency mixing services, to obscure the origins of illegal funds. This study presents a parametric analysis of these methods, examining dimensions such as duration, number of actors, contextual requirements, operational difficulty, traceability, and costs across each stage of the money laundering process: placement, layering, and integration. The analysis indicates that, while more sophisticated techniques may provide a higher degree of anonymity, they simultaneously require specialised technical expertise and meticulous planning. Consequently, there is a trade-off between the level of privacy attainable and the operational complexity inherent to each method. By systematically comparing these strategies, this analysis aims to contribute to a deeper understanding of cryptocurrency-based money laundering techniques, providing insight for more effective prevention and mitigation measures for both regulatory authorities and the financial sector. Full article
(This article belongs to the Special Issue Cryptocurrency Pricing and Trading)
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21 pages, 526 KB  
Article
Harmonisation of the Albanian Anti-Money Laundering Law with the EU Anti-Money Laundering Directive: Challenges and Perspectives
by Gledis Nano and Gentjan Skara
Laws 2025, 14(6), 95; https://doi.org/10.3390/laws14060095 - 1 Dec 2025
Viewed by 979
Abstract
As Albania aspires to join the EU by 2030, harmonisation of existing and future legislation and ensuring proper implementation remain the main priorities. Several working groups have been established to deal with harmonisation and enforcement. Although scepticism about Albania’s 2030 membership exists among [...] Read more.
As Albania aspires to join the EU by 2030, harmonisation of existing and future legislation and ensuring proper implementation remain the main priorities. Several working groups have been established to deal with harmonisation and enforcement. Although scepticism about Albania’s 2030 membership exists among Albanian scholars and politicians about whether public administration can address this daunting task, Albanian citizens are hopeful about finally joining the EU. This paper analyses the extent to which Albanian legislation on the prevention of money laundering and financing of terrorism aligns with the Anti-Money Laundering Directives and how it is enforced. Using both traditional legal and comparative methodologies, this paper compares whether the Albanian anti-money laundering and countering the financing of terrorism law aligns with the Anti-Money Laundering regime and assesses the level of enforcement of harmonised legislation. This paper concludes that, although the Albanian Law on anti-money laundering and terrorist financing largely aligns with the AML/FT Directive, proper implementation remains a challenge due to limited enforcement capacities, weak legal structures, and an essentially cash-based economy with a substantial informal economy. Full article
(This article belongs to the Section Criminal Justice Issues)
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17 pages, 1119 KB  
Article
Cryptocurrencies as a Tool for Money Laundering: Risk Assessment and Perception of Threats Based on Empirical Research
by Marta Spyra, Rafał Balina, Marta Idasz-Balina, Adam Zając and Filip Różyński
Risks 2025, 13(10), 189; https://doi.org/10.3390/risks13100189 - 2 Oct 2025
Viewed by 5178
Abstract
As the global economy undergoes rapid digital transformation, cryptocurrencies have emerged as a prominent alternative class of financial assets. Their decentralized nature, pseudonymity, and lack of centralized oversight have attracted considerable interest among investors while simultaneously raising significant concerns among regulators and compliance [...] Read more.
As the global economy undergoes rapid digital transformation, cryptocurrencies have emerged as a prominent alternative class of financial assets. Their decentralized nature, pseudonymity, and lack of centralized oversight have attracted considerable interest among investors while simultaneously raising significant concerns among regulators and compliance professionals. While cryptocurrencies offer benefits such as enhanced accessibility and transactional privacy, they also pose notable risks, particularly their potential misuse in financial crimes, including money laundering. This study explores the perceived risks associated with cryptocurrencies in the context of money laundering, drawing on insights from a survey conducted among 50 financial sector professionals. A quantitative research design was employed, using a structured online questionnaire to assess participants’ awareness, investment behavior, and perceptions of the role of cryptocurrencies in illicit finance and financial system security. The results reveal a complex perspective: while 70% of respondents acknowledged the potential for cryptocurrencies to facilitate money laundering, 60% expressed support for their wider adoption. Notably, statistically significant correlations emerged between active investment in cryptocurrencies and the belief that they could enhance financial market security and reduce laundering risks. However, self-reported knowledge levels and general awareness did not show a significant relationship with perceived risk. The findings underscore the importance of a balanced approach to regulation, one that fosters innovation while mitigating illicit finance risks. The study recommends increased investment in user education, the development of blockchain analytics, the adoption of global regulatory standards and enhanced international cooperation to ensure the responsible evolution of the cryptocurrency ecosystem. Full article
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20 pages, 1025 KB  
Article
Money Laundering in Global Economies: How Economic Openness and Governance Affect Money Laundering in the EU, G20, BRICS, and CIVETS
by Anas AlQudah, Mahmoud Hailat and Dana Setabouha
J. Risk Financial Manag. 2025, 18(6), 319; https://doi.org/10.3390/jrfm18060319 - 11 Jun 2025
Cited by 2 | Viewed by 4087
Abstract
Purpose—This study examines the interaction of economic openness, governance, and money laundering. The paper’s main objective is to analyze how trade openness, foreign direct investment, and anti-corruption measures influence the risk of money laundering in specific economic blocs. Design/methodology/approach—This study analyzes these economic [...] Read more.
Purpose—This study examines the interaction of economic openness, governance, and money laundering. The paper’s main objective is to analyze how trade openness, foreign direct investment, and anti-corruption measures influence the risk of money laundering in specific economic blocs. Design/methodology/approach—This study analyzes these economic blocs (EU, G20, BRICS, and CIVETS) using annual data from the Basel Institute on Governance and World Bank statistics for 2012–2021. A panel-corrected standard errors (PCSE) estimator is employed to examine the relationships among the variables, accounting for cross-sectional dependence and ensuring robust parameter estimation. The corruption control index is a proxy for governance effectiveness, though it does not directly measure regulatory strength. Future research should incorporate more specific variables to evaluate the regulatory impact. Findings—This study reveals significant variations in money laundering risks by a country’s income category and economic bloc influenced by economic openness and governance structures. Economic growth and foreign direct investment (FDI) inflows exhibit contrasting effects on money-laundering risks; they tend to exacerbate risks in middle-income countries, while high-income nations demonstrated a lower risk of money laundering, likely due to more robust governance structures. Trade openness and anti-corruption measures generally reduced risks in wealthier countries, highlighting the importance of strong governance frameworks. These insights suggest that anti-money-laundering policies should be tailored to fit different regions’ unique economic and institutional contexts for enhanced effectiveness. Originality—This study employs a structured approach to analyzing a decade of panel data from key economic blocs, providing insights into the intricate relationships between governance, economic openness, and money laundering risks. Bridging the gap between theoretical research and practical, actionable strategies serves as a valuable resource for improving the effectiveness of anti-money-laundering (AML) measures on a global scale. Full article
(This article belongs to the Section Economics and Finance)
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21 pages, 494 KB  
Article
LineMVGNN: Anti-Money Laundering with Line-Graph-Assisted Multi-View Graph Neural Networks
by Chung-Hoo Poon, James Kwok, Calvin Chow and Jang-Hyeon Choi
AI 2025, 6(4), 69; https://doi.org/10.3390/ai6040069 - 3 Apr 2025
Cited by 2 | Viewed by 5464
Abstract
Anti-money laundering (AML) systems are important for protecting the global economy. However, conventional rule-based methods rely on domain knowledge, leading to suboptimal accuracy and a lack of scalability. Graph neural networks (GNNs) for digraphs (directed graphs) can be applied to transaction graphs and [...] Read more.
Anti-money laundering (AML) systems are important for protecting the global economy. However, conventional rule-based methods rely on domain knowledge, leading to suboptimal accuracy and a lack of scalability. Graph neural networks (GNNs) for digraphs (directed graphs) can be applied to transaction graphs and capture suspicious transactions or accounts. However, most spectral GNNs do not naturally support multi-dimensional edge features, lack interpretability due to edge modifications, and have limited scalability owing to their spectral nature. Conversely, most spatial methods may not capture the money flow well. Therefore, in this work, we propose LineMVGNN (Line-Graph-Assisted Multi-View Graph Neural Network), a novel spatial method that considers payment and receipt transactions. Specifically, the LineMVGNN model extends a lightweight MVGNN module, which performs two-way message passing between nodes in a transaction graph. Additionally, LineMVGNN incorporates a line graph view of the original transaction graph to enhance the propagation of transaction information. We conduct experiments on two real-world account-based transaction datasets: the Ethereum phishing transaction network dataset and a financial payment transaction dataset from one of our industry partners. The results show that our proposed method outperforms state-of-the-art methods, reflecting the effectiveness of money laundering detection with line-graph-assisted multi-view graph learning. We also discuss scalability, adversarial robustness, and regulatory considerations of our proposed method. Full article
(This article belongs to the Special Issue AI in Finance: Leveraging AI to Transform Financial Services)
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27 pages, 1616 KB  
Article
Evaluating the Anti-Corruption Factor in Environmental, Social, and Governance Indices by Sampling Large Financial Asset Management Firms
by Kenneth David Strang and Narasimha Rao Vajjhala
Sustainability 2024, 16(23), 10240; https://doi.org/10.3390/su162310240 - 22 Nov 2024
Cited by 3 | Viewed by 3475
Abstract
Current Environmental, Social, and Governance (ESG) indices are flawed because the data are incomplete and not reported consistently, and some measured factors may be irrelevant to the industry. Regulators in the financial services industry emphasize reporting CO2 emissions (environmental factor), yet the [...] Read more.
Current Environmental, Social, and Governance (ESG) indices are flawed because the data are incomplete and not reported consistently, and some measured factors may be irrelevant to the industry. Regulators in the financial services industry emphasize reporting CO2 emissions (environmental factor), yet the key resources leveraged for production are rented offices, and internet–governance issues like money laundering, corruption, and unethical behavior would be more relevant. To investigate this problem, we sampled the finance and insurance industry firms in the USA with the greatest economic impact, i.e., those managing at least USD 1 trillion in assets. We used artificial intelligence to collect data about undisclosed legal decisions against firms to measure the ESG anti-corruption governance factor GRI 206-1, defined by the Global Reporting Institute (GRI) for global sustainable development goals (SDGs), which correspond to the United Nations’ SDGs. We applied Bayesian correlation with bootstrapping to test our hypotheses, followed by root cause analysis. We found that ESG ratings from providers did not reflect legal cases decided against firms; the Bayesian BF+0 odds ratio was 3005 (99% confidence intervals were 0.617, 0.965). Also, misconduct fines and arbitration legal case counts were significantly related for the same firm (the Vovk-Selke maximum p-ratio was 4411), but most ESG scores were significantly different for the same firm. We found three other studies in the literature that corroborated some of our findings that specific firms in our sample were considered to be unethical. We propose deeper study of the implications related to our findings based on public interest and stakeholder theory. Full article
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18 pages, 4479 KB  
Review
Mapping the Knowledge Landscape of Money Laundering for Terrorism Financing: A Bibliometric Analysis
by Himanshu Thakkar, Saptarshi Datta, Priyam Bhadra, Siddharth Baburao Dabhade, Haresh Barot and Shankar O. Junare
J. Risk Financial Manag. 2024, 17(10), 428; https://doi.org/10.3390/jrfm17100428 - 24 Sep 2024
Cited by 4 | Viewed by 4356
Abstract
This study employs a bibliometric analysis of emerging trends in money laundering for terrorism financing (ML/TF) to provide direction for future research. The authors used VOSviewer and analyzed 2577 published documents retrieved from the SCOPUS database using the PRISMA methodology. The findings reveal [...] Read more.
This study employs a bibliometric analysis of emerging trends in money laundering for terrorism financing (ML/TF) to provide direction for future research. The authors used VOSviewer and analyzed 2577 published documents retrieved from the SCOPUS database using the PRISMA methodology. The findings reveal a growing research interest in understanding the complex interplay between money laundering and terrorism financing. This research emphasizes the significance of ML/TF for economic stability, as understanding terrorism financing mechanisms allows authorities to trace and block funds going to terrorist groups, which is crucial for national security. Critical insights for policymakers underscore the need for robust legislative frameworks, effective Financial Intelligence Units (FIUs), and international collaboration to combat these global threats. This analysis offers a foundation for future research, mapping the evolving knowledge landscape in ML/TF. Full article
(This article belongs to the Special Issue Fintech, Business, and Development)
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27 pages, 1002 KB  
Article
Antecedents of Compliance with Anti-Money Laundering Regulations in the Banking Sector of Ghana
by Bernardette Naa Hoffman, Johnson Okeniyi and Sunday Eneojo Samuel
J. Risk Financial Manag. 2024, 17(8), 373; https://doi.org/10.3390/jrfm17080373 - 20 Aug 2024
Cited by 2 | Viewed by 8785
Abstract
This study examines factors influencing Ghanaian banks’ compliance with anti-money laundering (AML) legislation. Drawing upon institutional, compliance, and dynamic capability theories, the study identifies the interplay of organisational, regulatory, and employee factors influencing compliance outcomes. A mixed methods approach was used to collect [...] Read more.
This study examines factors influencing Ghanaian banks’ compliance with anti-money laundering (AML) legislation. Drawing upon institutional, compliance, and dynamic capability theories, the study identifies the interplay of organisational, regulatory, and employee factors influencing compliance outcomes. A mixed methods approach was used to collect data from 23 universal banks, 9 local and 14 foreign, in Ghana, focusing on experienced managers and employees in risk, legal, operations, compliance, and business development departments. The findings show that employee characteristics like due diligence and moral involvement have a positive relationship with compliance with AML regulations; however, contrary to expectations, effective AML/CFT programs did not significantly impact banks’ adherence to these regulations. The association between moral engagement, an innovative culture, and AML compliance is weakened by normative power and an innovative culture acting as negative moderators. This study contributes empirical evidence to the literature on AML compliance in emerging markets and offers practical implications for policymakers, regulators, and banking professionals seeking to boost regulatory effectiveness and mitigate financial crime risks. This study provides a foundation for targeted interventions and strategic initiatives aimed at strengthening the AML regulatory landscape in Ghana and other countries. Full article
(This article belongs to the Section Banking and Finance)
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22 pages, 3886 KB  
Article
A Novel Money Laundering Prediction Model Based on a Dynamic Graph Convolutional Neural Network and Long Short-Term Memory
by Fei Wan and Ping Li
Symmetry 2024, 16(3), 378; https://doi.org/10.3390/sym16030378 - 21 Mar 2024
Cited by 9 | Viewed by 5053
Abstract
Money laundering is an illicit activity that seeks to conceal the nature and origins of criminal proceeds, posing a substantial threat to the national economy, the political order, and social stability. To scientifically and reasonably predict money laundering risks, this paper focuses on [...] Read more.
Money laundering is an illicit activity that seeks to conceal the nature and origins of criminal proceeds, posing a substantial threat to the national economy, the political order, and social stability. To scientifically and reasonably predict money laundering risks, this paper focuses on the “layering” stage of the money laundering process in the field of supervised learning for money laundering fraud prediction. A money laundering and fraud prediction model based on deep learning, referred to as MDGC-LSTM, is proposed. The model combines the use of a dynamic graph convolutional network (MDGC) and a long short-term memory (LSTM) network to efficiently identify illegal money laundering activities within financial transactions. MDGC-LSTM constructs dynamic graph snapshots with symmetrical spatiotemporal structures based on transaction information, representing transaction nodes and currency flows as graph nodes and edges, respectively, and effectively captures the relationships between temporal and spatial structures, thus achieving the dynamic prediction of fraudulent transactions. The experimental results demonstrate that compared with traditional algorithms and other deep learning models, MDGC-LSTM achieves significant advantages in comprehensive spatiotemporal feature modeling. Specifically, based on the Elliptic dataset, MDGC-LSTM improves the Macro-F1 score by 0.25 compared to that of the anti-money laundering fraud prediction model currently considered optimal. Full article
(This article belongs to the Section Computer)
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13 pages, 11349 KB  
Article
Proposal of a Service Model for Blockchain-Based Security Tokens
by Keundug Park and Heung-Youl Youm
Big Data Cogn. Comput. 2024, 8(3), 30; https://doi.org/10.3390/bdcc8030030 - 12 Mar 2024
Cited by 3 | Viewed by 4276
Abstract
The volume of the asset investment and trading market can be expanded through the issuance and management of blockchain-based security tokens that logically divide the value of assets and guarantee ownership. This paper proposes a service model to solve a problem with the [...] Read more.
The volume of the asset investment and trading market can be expanded through the issuance and management of blockchain-based security tokens that logically divide the value of assets and guarantee ownership. This paper proposes a service model to solve a problem with the existing investment service model, identifies security threats to the service model, and specifies security requirements countering the identified security threats for privacy protection and anti-money laundering (AML) involving security tokens. The identified security threats and specified security requirements should be taken into consideration when implementing the proposed service model. The proposed service model allows users to invest in tokenized tangible and intangible assets and trade in blockchain-based security tokens. This paper discusses considerations to prevent excessive regulation and market monopoly in the issuance of and trading in security tokens when implementing the proposed service model and concludes with future works. Full article
(This article belongs to the Special Issue Blockchain Meets IoT for Big Data)
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23 pages, 2277 KB  
Article
The Impact of Academic Publications over the Last Decade on Historical Bitcoin Prices Using Generative Models
by Adela Bâra and Simona-Vasilica Oprea
J. Theor. Appl. Electron. Commer. Res. 2024, 19(1), 538-560; https://doi.org/10.3390/jtaer19010029 - 6 Mar 2024
Cited by 9 | Viewed by 6006
Abstract
Since 2012, researchers have explored various factors influencing Bitcoin prices. Up until the end of July 2023, more than 9100 research papers on cryptocurrencies were published and indexed in the Web of Science Clarivate platform. The objective of this paper is to analyze [...] Read more.
Since 2012, researchers have explored various factors influencing Bitcoin prices. Up until the end of July 2023, more than 9100 research papers on cryptocurrencies were published and indexed in the Web of Science Clarivate platform. The objective of this paper is to analyze the impact of publications on Bitcoin prices. This study aims to uncover significant themes within these research articles, focusing on cryptocurrencies in general and Bitcoin specifically. The research employs latent Dirichlet allocation to identify key topics from the unstructured abstracts. To determine the optimal number of topics, perplexity and topic coherence metrics are calculated. Additionally, the abstracts are processed using BERT-transformers and Word2Vec and their potential to predict Bitcoin prices is assessed. Based on the results, while the research helps in understanding cryptocurrencies, the potential of academic publications to influence Bitcoin prices is not significant, demonstrating a weak connection. In other words, the movements of Bitcoin prices are not influenced by the scientific writing in this specific field. The primary topics emerging from the analysis are the blockchain, market dynamics, transactions, pricing trends, network security, and the mining process. These findings suggest that future research should pay closer attention to issues like the energy demands and environmental impacts of mining, anti-money laundering measures, and behavioral aspects related to cryptocurrencies. Full article
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19 pages, 3953 KB  
Article
Predictive Power of Random Forests in Analyzing Risk Management in Islamic Banking
by Ahmet Faruk Aysan, Bekir Sait Ciftler and Ibrahim Musa Unal
J. Risk Financial Manag. 2024, 17(3), 104; https://doi.org/10.3390/jrfm17030104 - 1 Mar 2024
Cited by 7 | Viewed by 4615
Abstract
This study utilizes the random forest technique to investigate risk management practices and concerns in Islamic banks using survey data from 2016 to 2021. Findings reveal that larger banks provide more consistent survey responses, driven by their confidence and larger survey budgets. Moreover, [...] Read more.
This study utilizes the random forest technique to investigate risk management practices and concerns in Islamic banks using survey data from 2016 to 2021. Findings reveal that larger banks provide more consistent survey responses, driven by their confidence and larger survey budgets. Moreover, a positive link is established between a country’s development, characterized by high GDPs and low inflation and interest rates, and the precision of Islamic banks’ survey responses. Analyzing risk-related concerns, the study notes a significant reduction in credit portfolio risk attributed to improved risk management practices, global economic growth, stricter regulations, and diversified asset portfolios. Concerns related to terrorism financing and cybersecurity risks have also decreased due to the better enforcement of anti-money laundering regulations and investments in cybersecurity infrastructure and education. This research enhances our understanding of risk management in Islamic banks, highlighting the impact of bank size and country development. Additionally, it emphasizes the need for ongoing analysis beyond 2021 to account for potential COVID-19 effects and evolving risk management and regulatory practices in Islamic banking. Full article
(This article belongs to the Special Issue Blockchain Technologies and Cryptocurrencies​)
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24 pages, 2867 KB  
Article
Bitcoin Money Laundering Detection via Subgraph Contrastive Learning
by Shiyu Ouyang, Qianlan Bai, Hui Feng and Bo Hu
Entropy 2024, 26(3), 211; https://doi.org/10.3390/e26030211 - 28 Feb 2024
Cited by 17 | Viewed by 9157
Abstract
The rapid development of cryptocurrencies has led to an increasing severity of money laundering activities. In recent years, leveraging graph neural networks for cryptocurrency fraud detection has yielded promising results. However, many existing methods predominantly focus on node classification, i.e., detecting individual illicit [...] Read more.
The rapid development of cryptocurrencies has led to an increasing severity of money laundering activities. In recent years, leveraging graph neural networks for cryptocurrency fraud detection has yielded promising results. However, many existing methods predominantly focus on node classification, i.e., detecting individual illicit transactions, rather than uncovering behavioral pattern differences among money laundering groups. In this paper, we tackle the challenges presented by the organized, heterogeneous, and noisy nature of Bitcoin money laundering. We propose a novel subgraph-based contrastive learning algorithm for heterogeneous graphs, named Bit-CHetG, to perform money laundering group detection. Specifically, we employ predefined metapaths to construct the homogeneous subgraphs of wallet addresses and transaction records from the address–transaction heterogeneous graph, enhancing our ability to capture heterogeneity. Subsequently, we utilize graph neural networks to separately extract the topological embedding representations of transaction subgraphs and associated address representations of transaction nodes. Lastly, supervised contrastive learning is introduced to reduce the effect of noise, which pulls together the transaction subgraphs with the same class while pushing apart the subgraphs with different classes. By conducting experiments on two real-world datasets with homogeneous and heterogeneous graphs, the Micro F1 Score of our proposed Bit-CHetG is improved by at least 5% compared to others. Full article
(This article belongs to the Special Issue Blockchain and Cryptocurrency Complexity)
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