2019/12/26 by Longfei Li, Li, Longfei, Ziqi Liu +9 · 1 citation
Business, Management and Accounting · Computer Science · #FOS: Computer and information sciences #FinTech, Crowdfunding, Digital Finance #Imbalanced Data Classification Techniques #Machine Learning (cs.LG) #Machine Learning (stat.ML) #Spam and Phishing Detection
paper · pdf · doi:10.48550/arxiv.1912.11760
openalex publication_date 2019/12/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
With online payment platforms being ubiquitous and important, fraud transaction detection has become the key for such platforms, to ensure user account safety and platform security. In this work, we present a novel method for detecting fraud transactions by leveraging patterns from both users' static profiles and users' dynamic behaviors in a unified framework. To address and explore the information of users' behaviors in continuous time spaces, we propose to use time attention based recurrent layers to embed the detailed information of the time interval, such as the durations of specific actions, time differences between different actions and sequential behavior patterns,etc., in the same latent space. We further combine the learned embeddings and users' static profiles altogether in a unified framework. Extensive experiments validate the effectiveness of our proposed methods over state-of-the-art methods on various evaluation metrics, especially on recall at top percent which is an important metric for measuring the balance between service experiences and risk of potential losses.