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Log anomaly detection is a critical task for system operations and security assurance. However, in networked systems at scale, log data are generated at massive scale while instance-level annotations are prohibitively expensive, posing…

Machine Learning · Computer Science 2026-05-13 Yutszyuk Wong , Wentai Wu , Yuen-Ying Yeung , Weiwei Lin

Anomaly-based cyber threat detection using deep learning is on a constant growth in popularity for novel cyber-attack detection and forensics. A robust, efficient, and real-time threat detector in a large-scale operational enterprise…

Cryptography and Security · Computer Science 2024-10-30 Krishna Chandra Roy , Qian Chen

Anomaly detection becomes increasingly important for the dependability and serviceability of IT services. As log lines record events during the execution of IT services, they are a primary source for diagnostics. Thereby, unsupervised…

Machine Learning · Computer Science 2021-09-21 Thorsten Wittkopp , Alexander Acker , Sasho Nedelkoski , Jasmin Bogatinovski , Dominik Scheinert , Wu Fan , Odej Kao

Insiders are the trusted entities in the organization, but poses threat to the with access to sensitive information network and resources. The insider threat detection is a well studied problem in security analytics. Identifying the…

Cryptography and Security · Computer Science 2021-06-29 Gayathri R G , Atul Sajjanhar , Yong Xiang

This project explores large language models (LLMs) for anomaly detection across heterogeneous log sources. Traditional intrusion detection systems suffer from high false positive rates, semantic blindness, and data scarcity, as logs are…

Cryptography and Security · Computer Science 2026-02-09 Yassine Chagna , Antal Goldschmidt

The rapid advancement of machine learning technologies raises questions about the security of machine learning models, with respect to both training-time (poisoning) and test-time (evasion, impersonation, and inversion) attacks. Models…

Computer Vision and Pattern Recognition · Computer Science 2025-03-21 Xinheng Xie , Kureha Yamaguchi , Margaux Leblanc , Simon Malzard , Varun Chhabra , Victoria Nockles , Yue Wu

Insider threat detection has been a challenging task over decades, existing approaches generally employ the traditional generative unsupervised learning methods to produce normal user behavior model and detect significant deviations as…

Cryptography and Security · Computer Science 2021-08-25 Dongyang Li , Lin Yang , Hongguang Zhang , Xiaolei Wang , Linru Ma , Junchao Xiao

Logging code plays an important role in software systems by recording key events and behaviors, which are essential for debugging and monitoring. However, insecure logging practices can inadvertently expose sensitive information or enable…

Software Engineering · Computer Science 2026-04-23 He Yang Yuan , Xin Wang , Kundi Yao , An Ran Chen , Zishuo Ding , Zhenhao Li

Lateral movement is a crucial component of advanced persistent threat (APT) attacks in networks. Attackers exploit security vulnerabilities in internal networks or IoT devices, expanding their control after initial infiltration to steal…

Cryptography and Security · Computer Science 2024-11-18 Jiajun Zhou , Jiacheng Yao , Xuanze Chen , Shanqing Yu , Qi Xuan , Xiaoniu Yang

Most enterprise applications use logging as a mechanism to diagnose anomalies, which could help with reducing system downtime. Anomaly detection using software execution logs has been explored in several prior studies, using both classical…

Machine Learning · Computer Science 2023-11-01 Nadun Wijesinghe , Hadi Hemmati

Fall detection is a vital task in health monitoring, as it allows the system to trigger an alert and therefore enabling faster interventions when a person experiences a fall. Although most previous approaches rely on standard RGB video…

Computer Vision and Pattern Recognition · Computer Science 2023-08-24 Hejun Xiao , Kunyu Peng , Xiangsheng Huang , Alina Roitberg1 , Hao Li , Zhaohui Wang , Rainer Stiefelhagen

Model inference aims to extract accurate models from the execution logs of software systems. However, in reality, logs may contain some "noise" that could deteriorate the performance of model inference. One form of noise can commonly be…

Software Engineering · Computer Science 2020-04-17 Donghwan Shin , Domenico Bianculli , Lionel Briand

Logs provide users with useful insights to help with a variety of development and operations tasks. The problem is that logs are often unstructured, making their analysis a complex task. This is mainly due to the lack of guidelines and best…

Software Engineering · Computer Science 2021-11-01 Issam Sedki , Abdelwahab Hamou-Lhadj , Otmane Ait-Mohamed

The detection of anomalies is essential mining task for the security and reliability in computer systems. Logs are a common and major data source for anomaly detection methods in almost every computer system. They collect a range of…

Machine Learning · Computer Science 2020-08-24 Sasho Nedelkoski , Jasmin Bogatinovski , Alexander Acker , Jorge Cardoso , Odej Kao

Logs are essential for diagnosing failures and conducting retrospective studies, leading many software organizations to retain log messages for a long time. Nevertheless, the volume of generated log data grows rapidly as software systems…

Software Engineering · Computer Science 2026-03-24 Shiwen Shan , Yintong Huo , Hongzhan Zhong , Zhining Wang , Yuxin Su , Zibin Zheng

Most log-based anomaly detectors assume logs are stable, though logs are often unstable due to software or environmental changes. Anomaly detection on unstable logs (ULAD) is therefore a more realistic, yet under-investigated challenge.…

Software Engineering · Computer Science 2025-10-10 Fatemeh Hadadi , Qinghua Xu , Domenico Bianculli , Lionel Briand

System logs are a critical resource for monitoring and managing distributed systems, providing insights into failures and anomalous behavior. Traditional log analysis techniques, including template-based and sequence-driven approaches,…

Artificial Intelligence · Computer Science 2025-12-16 Anfeng Peng , Ajesh Koyatan Chathoth , Stephen Lee

Insider attacks are one of the most challenging cybersecurity issues for companies, businesses and critical infrastructures. Despite the implemented perimeter defences, the risk of this kind of attack is still very high. In fact, the…

Cryptography and Security · Computer Science 2021-09-07 Efthimios Pantelidis , Gueltoum Bendiab , Stavros Shiaeles , Nicholas Kolokotronis

A resilient multi-vehicle system cooperatively performs tasks by exchanging information, detecting, and removing cyber attacks that have the intent of hijacking or diminishing performance of the entire system. In this paper, we propose a…

Systems and Control · Electrical Eng. & Systems 2021-10-06 Paul J Bonczek , Nicola Bezzo

Recent benchmark efforts have advanced the evaluation of large language models (LLMs) in cybersecurity, including tasks such as penetration testing and vulnerability identification. However, a critical cybersecurity task, namely intrusion…

Cryptography and Security · Computer Science 2026-05-22 Danyu Sun , Jinghuai Zhang , Yuan Tian , Zhou Li