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arXiv · 2308.02793

Crowdsourcing Fraud Detection over Heterogeneous Temporal MMMA Graph

Zequan Xu·Qihang Sun·Shaofeng Hu·Jieming Shi·Hui Li
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Abstract

The rise of the click farm business using Multi-purpose Messaging Mobile Apps (MMMAs) tempts cybercriminals to perpetrate crowdsourcing frauds that cause financial losses to click farm workers. In this paper, we propose a novel contrastive multi-view learning method named CMT for crowdsourcing fraud detection over the heterogeneous temporal graph (HTG) of MMMA. CMT captures both heterogeneity and dynamics of HTG and generates high-quality representations for crowdsourcing fraud detection in a self-supervised manner. We deploy CMT to detect crowdsourcing frauds on an industry-size HTG of a representative MMMA WeChat and it significantly outperforms other methods. CMT also shows promising results for fraud detection on a large-scale public financial HTG, indicating that it can be applied in other graph anomaly detection tasks. We provide our implementation at https://github.com/KDEGroup/CMT.

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Zequan Xu, Qihang Sun, Shaofeng Hu, Jieming Shi, Hui Li. 2023-08-05. Crowdsourcing Fraud Detection over Heterogeneous Temporal MMMA Graph. https://arxiv.org/abs/2308.02793

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