arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.14635cs.LGstat.ML
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机器学习方法在标签稀缺的情况下检测比特币区块链中的洗钱行为

Machine learning methods to detect money laundering in the Bitcoin blockchain in the presence of label scarcity

NOVA IMS(新星信息管理学院);Feedzai

Joana Lorenz, Maria Inês Silva, David Aparício, João Tiago Ascensão, Pedro Bizarro

摘要:

每年,犯罪分子都会清洗从严重重罪中获得的数十亿美元(例如,恐怖主义、毒品走私或人口贩运)危害无数人和经济。特别是加密货币已经发展成为洗钱活动的避风港。机器学习可用于检测这些非法模式。然而,标签是如此稀缺,传统的监督算法是不适用的。在这里,我们解决洗钱检测假设最低限度地访问标签。首先,我们证明了现有的使用无监督异常检测方法的最先进的解决方案不足以检测真实比特币交易数据集中的非法模式。然后,我们表明,我们提出的主动学习解决方案是能够匹配的性能完全监督的基线仅使用5\%的标签。该解决方案模拟了一个典型的现实生活中的情况,其中有限数量的标签可以通过专家手动注释获得。

英文摘要:

Every year, criminals launder billions of dollars acquired from serious felonies (e.g., terrorism, drug smuggling, or human trafficking) harming countless people and economies. Cryptocurrencies, in particular, have developed as a haven for money laundering activity. Machine Learning can be used to detect these illicit patterns. However, labels are so scarce that traditional supervised algorithms are inapplicable. Here, we address money laundering detection assuming minimal access to labels. First, we show that existing state-of-the-art solutions using unsupervised anomaly detection methods are inadequate to detect the illicit patterns in a real Bitcoin transaction dataset. Then, we show that our proposed active learning solution is capable of matching the performance of a fully supervised baseline by using just 5\% of the labels. This solution mimics a typical real-life situation in which a limited number of labels can be acquired through manual annotation by experts.

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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