“In the realm of cybersecurity, phone number recycling (PNR) has emerged as a significant vulnerability for e-commerce platforms. A novel model, the temporal pattern and statistical feature fusion model (TSF), has been developed to detect compromised accounts due to reassigned numbers. This model leverages unique statistical features and temporal patterns observed in real-world datasets, such as Meituan's, to effectively identify and mitigate fraudulent activities. The TSF model has demonstrated superior performance over existing baselines, offering a cost-effective solution for e-commerce platforms with large-scale users.”