公开(公告)号：WO2022082091A1

公开(公告)日：2022-04-21

申请号：PCT/US2021/055374

申请日：2021-10-18

Applicant: VISA INTERNATIONAL SERVICE ASSOCIATION

Inventor： DONG, Bo ,  WU, Yuhang ,  LIN, Yu-San ,  YEH, Michael ,  YANG, Hao

IPC: G08B23/00

Abstract: Described are a system, method, and computer program product for user network activity anomaly detection. The method includes receiving network resource data associated with network resource activity of a plurality of users and generating a plurality of layers of a multilayer graph from the network resource data. Each layer of the plurality of layers may include a plurality of nodes, which are associated with users, connected by a plurality of edges, which are representative of node interdependency. The method also includes generating a plurality of adjacency matrices from the plurality of layers and generating a merged single layer graph based on a weighted sum of the plurality of adjacency matrices. The method further includes generating anomaly scores for each node in the merged single layer graph and determining a set of anomalous users based on the anomaly scores.