Abstract
Ubiquitous network data has given rise to diverse graph mining and analytical methods. One of the graph mining domains is anomaly detection in dynamic graphs, which can be employed for fraud detection, network intrusion detection, suspicious behaviour identification, etc. Most existing methods search for anomalies rather on the global level of the graphs. In this work, we propose a new anomaly detection and explanation algorithm for dynamic graphs. The algorithm searches for anomaly patterns in the form of predictive rules that enable us to examine the evolution of dynamic graphs on the level of subgraphs. Specifically, these patterns are able to capture addition and deletion of vertices and edges, and relabeling of vertices and edges. In addition, the algorithm outputs normal patterns that serve as an explanation for the anomaly patterns. The algorithm has been evaluated on two real-world datasets.
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Acknowledgments
We would like to thank the IDA reviewers for valuable comments and suggestions. We would also like to thank Jan Ramon for helpful discussion on anomaly detection in graphs. This work has been partially supported by Faculty of Informatics, Masaryk University, Brno.
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Vaculík, K., Popelínský, L. (2016). DGRMiner: Anomaly Detection and Explanation in Dynamic Graphs. In: Boström, H., Knobbe, A., Soares, C., Papapetrou, P. (eds) Advances in Intelligent Data Analysis XV. IDA 2016. Lecture Notes in Computer Science(), vol 9897. Springer, Cham. https://doi.org/10.1007/978-3-319-46349-0_27
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DOI: https://doi.org/10.1007/978-3-319-46349-0_27
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