Journal Article

User abnormal behavior recommendation via multilayer network

Liu, Weiyi, Liu, Xiaoyang, Liu, Zhining, Song, Chengyun

2019

Overview

With the growing popularity of online services such as online banking and online shopping, one of the essential research topics is how to build a privacy-preserving user abnormal behavior recommendation system. However, a machine-learning based system may present a dilemma. On one aspect, such system requires large volume of features to pre-train the model, but on another aspect, it is challenging to design usable features without looking to plaintext private data. In this paper, we propose an unorthodox approach involving graph analysis to resolve this dilemma and build a novel private-preserving recommendation system under a multilayer network framework. In experiments, we use a large, state-of-the-art dataset (containing more than 40,000 nodes and 43 million encrypted features) to evaluate the recommendation ability of our system on abnormal user behavior, yielding an overall precision rate of around 0.9, a recall rate of 1.0, and an F1-score of around 0.94. Also, we have also reported a linear time complexity for our system. Last, we deploy our system on the \"Wenjuanxing\" crowd-sourced system and \"Amazon Mechanical Turk\" for other users to evaluate in all aspects. The result shows that almost all feedbacks have achieved up to 85% satisfaction.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Algorithms / Analysis / Artificial intelligence / Banks (Finance) / Behavior Rating Scale - standards / Computer and Information Sciences / Computer science / Crowdsourcing / Data mining / Distance learning / E-commerce / Electronic banking / Electronic commerce / Graphs / Home banking / Humans / International conferences / Internet / Internet - trends / Knowledge discovery / Knowledge management / Learning algorithms / Machine Learning / Multilayers / Neural networks / Novels / Online banking / Physical Sciences / Privacy / Recommender systems / Research and Analysis Methods / Security Measures - ethics / Security Measures - standards / User behavior