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arXiv 2011.08492cs.LGcs.AI
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一种基于时频分析的反洗钱可疑活动检测方法

A Time-Frequency based Suspicious Activity Detection for Anti-Money Laundering

H3M.IO;ITU TEKNOPARK(ITU技术园区)

Utku Görkem Ketenci, Tolga Kurt, Selim Önal, Cenk Erbil, Sinan Aktürkoğlu, Hande Şerban İlhan

摘要:

洗钱是犯罪分子将犯罪所得注入金融系统的重要机制。侦查与洗钱有关的可疑活动的主要责任在于金融机构。这些机构的现行制度大多是以规则为基础的,而且效率低下。现有的基于数据科学的反洗钱(AML)模型,以取代现有的基于规则的系统工作的客户关系管理(CRM)功能和交易行为的时间特征。然而,由于成千上万的可能特征,特征工程的准确性和问题仍然是一个挑战。为了提高AML系统中可疑交易监测系统的检测性能,本文提出了一种基于时频分析的特征集,该特征集利用金融交易的二维表示。利用随机森林作为机器学习方法,采用模拟退火进行超参数整定。所设计的算法进行了测试,真实的银行数据,证明在实际相关的环境中的结果的有效性。结果表明,可疑和非可疑实体的时间-频率特征显著不同,这将大大提高基于数据科学的交易监控系统的精度,仅关注时间序列交易和CRM特征。

英文摘要:

Money laundering is the crucial mechanism utilized by criminals to inject proceeds of crime to the financial system. The primary responsibility of the detection of suspicious activity related to money laundering is with the financial institutions. Most of the current systems in these institutions are rule-based and ineffective. The available data science-based anti-money laundering (AML) models in order to replace the existing rule-based systems work on customer relationship management (CRM) features and time characteristics of transaction behaviour. However, there is still a challenge on accuracy and problems around feature engineering due to thousands of possible features. Aiming to improve the detection performance of suspicious transaction monitoring systems for AML systems, in this article, we introduce a novel feature set based on time-frequency analysis, that makes use of 2-D representations of financial transactions. Random forest is utilized as a machine learning method, and simulated annealing is adopted for hyperparameter tuning. The designed algorithm is tested on real banking data, proving the efficacy of the results in practically relevant environments. It is shown that the time-frequency characteristics of suspicious and non-suspicious entities differentiate significantly, which would substantially improve the precision of data science-based transaction monitoring systems looking at only time-series transaction and CRM features.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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