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Industrial control systems (ICSs) are widely used in industry, and their security and stability are very important. Once the ICS is attacked, it may cause serious damage. Therefore, it is very important to detect anomalies in ICSs. ICS can…

Cryptography and Security · Computer Science 2025-09-16 Dongyang Zhan , Wenqi Zhang , Lin Ye , Xiangzhan Yu , Hongli Zhang , Zheng He

In the Internet of Things (IoT) devices are exposed to various kinds of attacks when connected to the Internet. An attack detection mechanism that understands the limitations of these severely resource-constrained devices is necessary. This…

Cryptography and Security · Computer Science 2017-01-25 Nidhi Rastogi , James Hendler

Ensuring the security of cloud environments is imperative for sustaining organizational growth and operational efficiency. As the ubiquity of cloud services continues to rise, the inevitability of cyber threats underscores the importance of…

Networking and Internet Architecture · Computer Science 2024-09-20 Revital Marbel , Yanir Cohen , Ran Dubin , Amit Dvir , Chen Hajaj

Given a stream of graph edges from a dynamic graph, how can we assign anomaly scores to edges in an online manner, for the purpose of detecting unusual behavior, using constant time and memory? Existing approaches aim to detect individually…

Machine Learning · Computer Science 2022-04-26 Siddharth Bhatia , Rui Liu , Bryan Hooi , Minji Yoon , Kijung Shin , Christos Faloutsos

As the communication industry has connected distant corners of the globe using advances in network technology, intruders or attackers have also increased attacks on networking infrastructure commensurately. System administrators can attempt…

Cryptography and Security · Computer Science 2012-11-21 Monowar H. Bhuyan , D. K. Bhattacharyya , J. K. Kalita

Anomaly detection is critical for finding suspicious behavior in innumerable systems. We need to detect anomalies in real-time, i.e. determine if an incoming entity is anomalous or not, as soon as we receive it, to minimize the effects of…

Machine Learning · Computer Science 2023-01-31 Siddharth Bhatia

Recently, graph anomaly detection on attributed networks has attracted growing attention in data mining and machine learning communities. Apart from attribute anomalies, graph anomaly detection also aims at suspicious topological-abnormal…

Machine Learning · Computer Science 2023-10-03 Jingcan Duan , Bin Xiao , Siwei Wang , Haifang Zhou , Xinwang Liu

Network-based intrusion detection system (NIDS) monitors network traffic for malicious activities, forming the frontline defense against increasing attacks over information infrastructures. Although promising, our quantitative analysis…

Cryptography and Security · Computer Science 2025-05-08 Chenyang Qiu , Yingsheng Geng , Junrui Lu , Kaida Chen , Shitong Zhu , Ya Su , Guoshun Nan , Can Zhang , Junsong Fu , Qimei Cui , Xiaofeng Tao

Anomaly detection systems aim to detect and report attacks or unexpected behavior in networked systems. Previous work has shown that anomalies have an impact on system performance, and that performance signatures can be effectively used for…

Intrusion detection systems (IDS) are essential for protecting computer systems and networks against a wide range of cyber threats that continue to evolve over time. IDS are commonly categorized into two main types, each with its own…

Cryptography and Security · Computer Science 2026-01-21 Messaouda Boutassetta , Amina Makhlouf , Newfel Messaoudi , Abdelmadjid Benmachiche , Ines Boutabia

Anomaly detection in dynamic graphs is a critical task with broad real-world applications, including social networks, e-commerce, and cybersecurity. Most existing methods assume that normal patterns remain stable over time; however, this…

Machine Learning · Computer Science 2025-09-23 Xiaoyang Xu , Xiaofeng Lin , Koh Takeuchi , Kyohei Atarashi , Hisashi Kashima

Network Intrusion Detection Systems (NIDS) are essential tools for detecting network attacks and intrusions. While extensive research has explored the use of supervised Machine Learning for attack detection and characterisation, these…

Cryptography and Security · Computer Science 2026-04-23 Georgios Anyfantis , Pere Barlet-Ros

With the growing complexity of cyberattacks targeting critical infrastructures such as water treatment networks, there is a pressing need for robust anomaly detection strategies that account for both system vulnerabilities and evolving…

Machine Learning · Computer Science 2025-08-14 Arun Vignesh Malarkkan , Haoyue Bai , Dongjie Wang , Yanjie Fu

This survey paper presents a comprehensive and conceptual overview of anomaly detection using dynamic graphs. We focus on existing graph-based anomaly detection (AD) techniques and their applications to dynamic networks. The contributions…

Machine Learning · Computer Science 2024-06-04 Ocheme Anthony Ekle , William Eberle

Anomaly detection is a critical task in cybersecurity, where identifying insider threats, access violations, and coordinated attacks is essential for ensuring system resilience. Graph-based approaches have become increasingly important for…

Cryptography and Security · Computer Science 2026-03-31 Laura Jiang , Reza Ryan , Qian Li , Nasim Ferdosian

Industrial Control Systems (ICS) underpin critical infrastructure and face growing cyber-physical threats due to the convergence of operational technology and networked environments. While machine learning-based anomaly detection approaches…

Machine Learning · Computer Science 2026-03-12 Kosti Koistinen , Kirsi Hellsten , Joni Herttuainen , Kimmo K. Kaski

Graph anomaly detection plays a vital role for identifying abnormal instances in complex networks. Despite advancements of methodology based on deep learning in recent years, existing benchmarking approaches exhibit limitations that hinder…

Machine Learning · Computer Science 2024-03-08 Jing Gu , Dongmian Zou

Given a stream of graph edges from a dynamic graph, how can we assign anomaly scores to edges in an online manner, for the purpose of detecting unusual behavior, using constant time and memory? Existing approaches aim to detect individually…

Machine Learning · Computer Science 2020-08-25 Siddharth Bhatia , Bryan Hooi , Minji Yoon , Kijung Shin , Christos Faloutsos

Detecting and responding to cyber attacks is increasingly difficult as high-volume, complex network traffic allows threats to remain concealed. While Intrusion Detection Systems (IDSs) identify anomalous behavior, Attack Graphs (AGs) serve…

Cryptography and Security · Computer Science 2026-03-10 Andrea Agiollo , Enkeleda Bardhi , Alessandro Palma , Riccardo Lazzeretti , Silvia Bonomi , Fernando Kuipers

Given a stream of graph edges from a dynamic graph, how can we assign anomaly scores to edges and subgraphs in an online manner, for the purpose of detecting unusual behavior, using constant time and memory? For example, in intrusion…

Data Structures and Algorithms · Computer Science 2023-07-18 Siddharth Bhatia , Mohit Wadhwa , Kenji Kawaguchi , Neil Shah , Philip S. Yu , Bryan Hooi
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