English
Related papers

Related papers: UniGAD: Unifying Multi-level Graph Anomaly Detecti…

200 papers

Anomaly detection on dynamic graphs refers to detecting entities whose behaviors obviously deviate from the norms observed within graphs and their temporal information. This field has drawn increasing attention due to its application in…

Machine Learning · Computer Science 2023-10-26 Shiqi Lou , Qingyue Zhang , Shujie Yang , Yuyang Tian , Zhaoxuan Tan , Minnan Luo

In recent years, graph anomaly detection has found extensive applications in various domains such as social, financial, and communication networks. However, anomalies in graph-structured data present unique challenges, including label…

Machine Learning · Computer Science 2025-06-05 Yuxuan Cao , Jiarong Xu , Chen Zhao , Jiaan Wang , Carl Yang , Chunping Wang , Yang Yang

Unsupervised graph-level anomaly detection (UGAD) has received remarkable performance in various critical disciplines, such as chemistry analysis and bioinformatics. Existing UGAD paradigms often adopt data augmentation techniques to…

Machine Learning · Computer Science 2024-05-07 Jindong Li , Qianli Xing , Qi Wang , Yi Chang

Graph anomaly detection (GAD), which aims to identify nodes in a graph that significantly deviate from normal patterns, plays a crucial role in broad application domains. However, existing GAD methods are one-model-for-one-dataset…

Machine Learning · Computer Science 2025-06-10 Chaoxi Niu , Hezhe Qiao , Changlu Chen , Ling Chen , Guansong Pang

Graph Anomaly Detection (GAD) is a technique used to identify abnormal nodes within graphs, finding applications in network security, fraud detection, social media spam detection, and various other domains. A common method for GAD is Graph…

Machine Learning · Computer Science 2025-01-28 Amit Roy , Juan Shu , Jia Li , Carl Yang , Olivier Elshocht , Jeroen Smeets , Pan Li

Graph anomaly detection (GAD) has gained increasing attention in recent years due to its critical application in a wide range of domains, such as social networks, financial risk management, and traffic analysis. Existing GAD methods can be…

Social and Information Networks · Computer Science 2023-11-21 Jie Liu , Mengting He , Xuequn Shang , Jieming Shi , Bin Cui , Hongzhi Yin

Graph anomaly detection in this paper aims to distinguish abnormal nodes that behave differently from the benign ones accounting for the majority of graph-structured instances. Receiving increasing attention from both academia and industry,…

Machine Learning · Computer Science 2022-10-19 Fanzhen Liu , Xiaoxiao Ma , Jia Wu , Jian Yang , Shan Xue , Amin Beheshti , Chuan Zhou , Hao Peng , Quan Z. Sheng , Charu C. Aggarwal

Detecting anomalous nodes in attributed networks, where each node is associated with both structural connections and descriptive attributes, is essential for identifying fraud, misinformation, and suspicious behavior in domains such as…

Social and Information Networks · Computer Science 2025-10-31 Apu Chakraborty , Anshul Kumar , Gagan Raj Gupta

Graph anomaly detection (GAD), which aims to detect outliers in graph-structured data, has received increasing research attention recently. However, existing GAD methods assume identical training and testing distributions, which is rarely…

Machine Learning · Computer Science 2025-11-11 Junjun Pan , Yixin Liu , Chuan Zhou , Fei Xiong , Alan Wee-Chung Liew , Shirui Pan

Graph anomaly detection has attracted considerable attention from various domain ranging from network security to finance in recent years. Due to the fact that labeling is very costly, existing methods are predominately developed in an…

Machine Learning · Computer Science 2024-04-15 Hwan Kim , Junghoon Kim , Byung Suk Lee , Sungsu Lim

This work considers a practical semi-supervised graph anomaly detection (GAD) scenario, where part of the nodes in a graph are known to be normal, contrasting to the extensively explored unsupervised setting with a fully unlabeled graph. We…

Machine Learning · Computer Science 2024-12-20 Hezhe Qiao , Qingsong Wen , Xiaoli Li , Ee-Peng Lim , Guansong Pang

Anomaly detection from graph data has drawn much attention due to its practical significance in many critical applications including cybersecurity, finance, and social networks. Existing data mining and machine learning methods are either…

Machine Learning · Computer Science 2022-01-25 Yu Zheng , Ming Jin , Yixin Liu , Lianhua Chi , Khoa T. Phan , Yi-Ping Phoebe Chen

Graph Anomaly Detection (GAD) plays a vital role in various data mining applications such as e-commerce fraud prevention and malicious user detection. Recently, Graph Neural Network (GNN) based approach has demonstrated great effectiveness…

Machine Learning · Computer Science 2025-03-18 Hang Ni , Jindong Han , Nengjun Zhu , Hao Liu

Graph anomaly detection is crucial for identifying nodes that deviate from regular behavior within graphs, benefiting various domains such as fraud detection and social network. Although existing reconstruction-based methods have achieved…

Machine Learning · Computer Science 2023-12-25 Junwei He , Qianqian Xu , Yangbangyan Jiang , Zitai Wang , Qingming Huang

In the web era, graph machine learning has been widely used on ubiquitous graph-structured data. As a pivotal component for bolstering web security and enhancing the robustness of graph-based applications, the significance of graph anomaly…

Machine Learning · Computer Science 2024-01-25 Wenjing Chang , Kay Liu , Kaize Ding , Philip S. Yu , Jianjun Yu

A large number of studies on Graph Outlier Detection (GOD) have emerged in recent years due to its wide applications, in which Unsupervised Node Outlier Detection (UNOD) on attributed networks is an important area. UNOD focuses on detecting…

Machine Learning · Computer Science 2024-06-04 Yihong Huang , Liping Wang , Fan Zhang , Xuemin Lin

The widespread application of graph data in various high-risk scenarios has increased attention to graph anomaly detection (GAD). Faced with real-world graphs that often carry node descriptions in the form of raw text sequences, termed…

Machine Learning · Computer Science 2025-08-04 Yiming Xu , Xu Hua , Zhen Peng , Bin Shi , Jiarun Chen , Xingbo Fu , Song Wang , Bo Dong

Graph Anomaly Detection (GAD) has recently become a hot research spot due to its practicability and theoretical value. Since GAD emphasizes the application and the rarity of anomalous samples, enriching the varieties of its datasets is…

Social and Information Networks · Computer Science 2023-06-12 Xuanwen Huang , Yang Yang , Yang Wang , Chunping Wang , Zhisheng Zhang , Jiarong Xu , Lei Chen , Michalis Vazirgiannis

Graph anomaly detection (GAD) aims to identify nodes or substructures whose behavior or attributes deviate significantly from the overall pattern in graph-structured data, with critical applications in financial risk control, social network…

Machine Learning · Computer Science 2026-05-27 Yuxin Yang , Limei Hu , Feng Chen

With the rapid growth of graph-structured data in critical domains, unsupervised graph-level anomaly detection (UGAD) has become a pivotal task. UGAD seeks to identify entire graphs that deviate from normal behavioral patterns. However,…

Machine Learning · Computer Science 2025-11-07 Qingfeng Chen , Haojin Zeng , Jingyi Jie , Shichao Zhang , Debo Cheng