CDR2IMG:A Bridge from Text to Image in Telecommunication Fraud Detection  

作　　者：Zhen Zhen Jian Gao 

机构地区：[1]School of Information Network Security,People’s Public Security University of China,Beijing,100038,China [2]Key Laboratory of Safety Precautions and Risk Assessment,Ministry of Public Security,Beijing,102623,China

出　　处：《Computer Systems Science & Engineering》2023年第10期955-973,共19页计算机系统科学与工程（英文）

基　　金：This research was funded by the Double Top-Class Innovation research project in Cyberspace Security Enforcement Technology of People’s Public Security University of China(No.2023SYL07).

摘　　要：Telecommunication fraud has run rampant recently worldwide.However,previous studies depend highly on expert knowledge-based feature engineering to extract behavior information,which cannot adapt to the fastchanging modes of fraudulent subscribers.Therefore,we propose a new taxonomy that needs no hand-designed features but directly takes raw Call DetailRecords(CDR)data as input for the classifier.Concretely,we proposed a fraud detectionmethod using a convolutional neural network(CNN)by taking CDR data as images and applying computer vision techniques like image augmentation.Comprehensive experiments on the real-world dataset from the 2020 Digital Sichuan Innovation Competition show that our proposed method outperforms the classic methods in many metrics with excellent stability in both the changes of quantity and the balance of samples.Compared with the state-of-the-art method,the proposed method has achieved about 89.98%F1-score and 92.93%AUC,improving 2.97%and 0.48%,respectively.With the augmentation technique,the model’s performance can be further enhanced by a 91.09%F1-score and a 94.49%AUC respectively.Beyond telecommunication fraud detection,our method can also be extended to other text datasets to automatically discover new features in the view of computer vision and its powerful methods.

关 键 词：Telecommunication fraud detection call detail records convolutional neural network 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]