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Large Language Models (LLMs) remain vulnerable to multi-turn jailbreak attacks. We introduce HarmNet, a modular framework comprising ThoughtNet, a hierarchical semantic network; a feedback-driven Simulator for iterative query refinement;…

Cryptography and Security · Computer Science 2025-10-22 Sidhant Narula , Javad Rafiei Asl , Mohammad Ghasemigol , Eduardo Blanco , Daniel Takabi

Sensor-based human activity recognition (HAR) requires to predict the action of a person based on sensor-generated time series data. HAR has attracted major interest in the past few years, thanks to the large number of applications enabled…

Machine Learning · Computer Science 2021-03-30 Davide Buffelli , Fabio Vandin

The rapid expansion of Internet use has increased system exposure to cyber threats, with advanced persistent threats (APTs) being especially challenging due to their stealth, prolonged duration, and multi-stage attacks targeting high-value…

Cryptography and Security · Computer Science 2026-03-11 Willie Kouam , Stefan Rass

Highway deep neural network (HDNN) is a type of depth-gated feedforward neural network, which has shown to be easier to train with more hidden layers and also generalise better compared to conventional plain deep neural networks (DNNs).…

Computation and Language · Computer Science 2017-03-23 Liang Lu

Deep Knowledge Tracing (DKT) models student learning behavior by using Recurrent Neural Networks (RNNs) to predict future performance based on historical interaction data. However, the original implementation relied on standard RNNs in the…

Machine Learning · Computer Science 2025-04-30 Altun Shukurlu

This proposed model introduces novel deep learning methodologies. The objective here is to create a reliable intrusion detection mechanism to help identify malicious attacks. Deep learning based solution framework is developed consisting of…

Networking and Internet Architecture · Computer Science 2023-10-26 Arun Kumar Silivery , Ram Mohan Rao Kovvur

Predicting the trajectories of road agents is essential for autonomous driving systems. The recent mainstream methods follow a static paradigm, which predicts the future trajectory by using a fixed duration of historical frames. These…

Computer Vision and Pattern Recognition · Computer Science 2024-04-12 Xiaolong Tang , Meina Kan , Shiguang Shan , Zhilong Ji , Jinfeng Bai , Xilin Chen

Provenance analysis based on system audit data has emerged as a fundamental approach for investigating Advanced Persistent Threat (APT) attacks. Due to the high concealment and long-term persistence of APT attacks, they are only represented…

Cryptography and Security · Computer Science 2025-10-28 Qi Sheng

Organizations are increasingly targeted by Advanced Persistent Threats (APTs), which involve complex, multi-stage tactics and diverse techniques. Cyber Threat Intelligence (CTI) sources, such as incident reports and security blogs, provide…

Cryptography and Security · Computer Science 2025-04-09 Sofia Della Penna , Roberto Natella , Vittorio Orbinato , Lorenzo Parracino , Luciano Pianese

Prompt-based attack techniques are one of the primary challenges in securely deploying and protecting LLM-based AI systems. LLM inputs are an unbounded, unstructured space. Consequently, effectively defending against these attacks requires…

Cryptography and Security · Computer Science 2026-01-28 Henry Chen , Victor Aranda , Samarth Keshari , Ryan Heartfield , Nicole Nichols

APT (Advanced Persistent Threat) with the characteristics of persistence, stealth, and diversity is one of the greatest threats against cyber-infrastructure. As a countermeasure, existing studies leverage provenance graphs to capture the…

Cryptography and Security · Computer Science 2024-09-12 Mingqi Lv , HongZhe Gao , Xuebo Qiu , Tieming Chen , Tiantian Zhu , Jinyin Chen , Shouling Ji

Machine learning (ML) techniques have been demonstrated to improve the accuracy and efficiency of anomaly detection (AD) when compared to conventional methods. This has led to the adoption of ML for data quality monitoring (DQM) use cases…

Training large neural networks with data-parallel stochastic gradient descent allocates N GPU replicas to compute effectively identical updates -- a practice that leaves the rich space of learning rate configurations entirely unexplored…

Machine Learning · Computer Science 2026-04-28 Hailing Cheng , Tao Huang , Chen Zhu , Antonio Alonso

We study the problem of knowledge tracing (KT) where the goal is to trace the students' knowledge mastery over time so as to make predictions on their future performance. Owing to the good representation capacity of deep neural networks…

Computers and Society · Computer Science 2021-08-11 Xiaopeng Guo , Zhijie Huang , Jie Gao , Mingyu Shang , Maojing Shu , Jun Sun

In this paper, we introduce Attention Prompt Tuning (APT) - a computationally efficient variant of prompt tuning for video-based applications such as action recognition. Prompt tuning approaches involve injecting a set of learnable prompts…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Wele Gedara Chaminda Bandara , Vishal M. Patel

Deep neural networks are powerful tools for solving nonlinear problems in science and engineering, but training highly accurate models becomes challenging as problem complexity increases. Non-convex optimization and sensitivity to…

Machine Learning · Computer Science 2026-04-20 Ethan Mulle , Wei Kang , Qi Gong

Deep neural networks have demonstrated cutting edge performance on various tasks including classification. However, it is well known that adversarially designed imperceptible perturbation of the input can mislead advanced classifiers. In…

Machine Learning · Computer Science 2020-01-07 Mehdi Jafarnia-Jahromi , Tasmin Chowdhury , Hsin-Tai Wu , Sayandev Mukherjee

How to obtain hierarchical representations with an increasing level of abstraction becomes one of the key issues of learning with deep neural networks. A variety of RNN models have recently been proposed to incorporate both explicit and…

Computation and Language · Computer Science 2022-01-25 Zhaoxin Luo , Michael Zhu

The Hidden Markov Model (HMM) can predict the future value of a time series based on its current and previous values, making it a powerful algorithm for handling various types of time series. Numerous studies have explored the improvement…

Machine Learning · Computer Science 2024-02-28 YeXin Huang

We describe a generalization of the Hierarchical Dirichlet Process Hidden Markov Model (HDP-HMM) which is able to encode prior information that state transitions are more likely between "nearby" states. This is accomplished by defining a…

Machine Learning · Statistics 2017-07-24 Colin Reimer Dawson , Chaofan Huang , Clayton T. Morrison