PD-FDS: Purchase Density based Online Credit Card Fraud Detection System


Youngjoon Ki, Ji Won Yoon ;
Proceedings of the KDD 2017: Workshop on Anomaly Detection in Finance, PMLR 71:76-84, 2018.


Credit card fraud detection is an endless war between fraudsters and payment service providers. Indeed, annual global financial loss by credit card frauds has increased. Fraudsters have been organized and systematized, attempting to nd weak points of existing fraud detection system (FDS). State-of-the-art FDS approaches utilize already existing fraud cases, which can result in di erent FDS by payment service providers. Therefore, a new payment service provider may not have room for installing a FDS due to the lack of fraudulent cases. Moreover, credit card transactions contain the legitimate owner’s personal information, which can be exposed to an honest but curious fraud analyst. In this paper, we propose a purchase density based FDS (PD-FDS) that uses three features which are not related to personal information. PD-FDS does not require already existing fraudulent transactions and also shows low false positive rate (<0.01).

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