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Backdoor attacks pose a significant threat to deep learning models by implanting hidden vulnerabilities that can be activated by malicious inputs. While numerous defenses have been proposed to mitigate these attacks, the heterogeneous…

Cryptography and Security · Computer Science 2025-11-18 Gorka Abad , Marina Krček , Stefanos Koffas , Behrad Tajalli , Marco Arazzi , Roberto Riaño , Xiaoyun Xu , Zhuoran Liu , Antonino Nocera , Stjepan Picek

Backdoor attack has emerged as a major security threat to deep neural networks (DNNs). While existing defense methods have demonstrated promising results on detecting or erasing backdoors, it is still not clear whether robust training…

Machine Learning · Computer Science 2021-12-02 Yige Li , Xixiang Lyu , Nodens Koren , Lingjuan Lyu , Bo Li , Xingjun Ma

Aligning generative diffusion models with human preferences via reinforcement learning (RL) is critical yet challenging. Most existing algorithms are often vulnerable to reward hacking, such as quality degradation, over-stylization, or…

Deep Neural Networks (DNN) are becoming increasingly more important in assisted and automated driving. Using such entities which are obtained using machine learning is inevitable: tasks such as recognizing traffic signs cannot be developed…

Cryptography and Security · Computer Science 2024-10-11 Akshay Dhonthi , Ernst Moritz Hahn , Vahid Hashemi

Existing studies in backdoor defense have predominantly focused on the training phase, overlooking the critical aspect of testing time defense. This gap becomes pronounced in the context of LLMs deployed as Web Services, which typically…

Computation and Language · Computer Science 2025-02-13 Wenjie Mo , Jiashu Xu , Qin Liu , Jiongxiao Wang , Jun Yan , Hadi Askari , Chaowei Xiao , Muhao Chen

With the swift advancement of deep learning, state-of-the-art algorithms have been utilized in various social situations. Nonetheless, some algorithms have been discovered to exhibit biases and provide unequal results. The current debiasing…

Machine Learning · Computer Science 2024-07-02 Shangxi Wu , Qiuyang He , Jian Yu , Jitao Sang

A deep reinforcement learning (DRL) agent observes its states through observations, which may contain natural measurement errors or adversarial noises. Since the observations deviate from the true states, they can mislead the agent into…

Machine Learning · Computer Science 2021-07-15 Huan Zhang , Hongge Chen , Chaowei Xiao , Bo Li , Mingyan Liu , Duane Boning , Cho-Jui Hsieh

Recent advancements in Deep Reinforcement Learning (DRL) have demonstrated its applicability across various domains, including robotics, healthcare, energy optimization, and autonomous driving. However, a critical question remains: How…

Machine Learning · Computer Science 2025-07-24 Adithya Mohan , Dominik Rößle , Daniel Cremers , Torsten Schön

Diffusion language models (DLMs) have recently emerged as an alternative modeling paradigm to autoregressive (AR) language models, enabling parallel generation and bidirectional context modeling. Yet their security implications,…

Cryptography and Security · Computer Science 2026-05-12 Shengfang Zhai , Xiaoyang Ji , Yuling Shi , Haoran Gao , Fanyu Meng , Yan Zeng , Yuejian Fang , Yinpeng Dong , Jiaheng Zhang

Deep Reinforcement Learning (DRL) has become an appealing solution to algorithmic trading such as high frequency trading of stocks and cyptocurrencies. However, DRL have been shown to be susceptible to adversarial attacks. It follows that…

Machine Learning · Computer Science 2020-10-24 Yaser Faghan , Nancirose Piazza , Vahid Behzadan , Ali Fathi

The backdoor attack, where the adversary uses inputs stamped with triggers (e.g., a patch) to activate pre-planted malicious behaviors, is a severe threat to Deep Neural Network (DNN) models. Trigger inversion is an effective way of…

Machine Learning · Computer Science 2023-04-07 Zhenting Wang , Kai Mei , Juan Zhai , Shiqing Ma

Recent studies revealed that deep neural networks (DNNs) are exposed to backdoor threats when training with third-party resources (such as training samples or backbones). The backdoored model has promising performance in predicting benign…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Chengxiao Luo , Yiming Li , Yong Jiang , Shu-Tao Xia

This study investigates behavior-targeted attacks on reinforcement learning and their countermeasures. Behavior-targeted attacks aim to manipulate the victim's behavior as desired by the adversary through adversarial interventions in state…

Machine Learning · Computer Science 2026-02-18 Shojiro Yamabe , Kazuto Fukuchi , Jun Sakuma

The ubiquity of deep neural networks (DNNs), cloud-based training, and transfer learning is giving rise to a new cybersecurity frontier in which unsecure DNNs have `structural malware' (i.e., compromised weights and activation pathways). In…

Machine Learning · Computer Science 2021-02-05 N. Benjamin Erichson , Dane Taylor , Qixuan Wu , Michael W. Mahoney

The current state-of-the-art backdoor attacks against Reinforcement Learning (RL) rely upon unrealistically permissive access models, that assume the attacker can read (or even write) the victim's policy parameters, observations, or…

Machine Learning · Computer Science 2025-05-27 Shijie Liu , Andrew C. Cullen , Paul Montague , Sarah Erfani , Benjamin I. P. Rubinstein

It has been shown that natural language processing (NLP) models are vulnerable to a kind of security threat called the Backdoor Attack, which utilizes a `backdoor trigger' paradigm to mislead the models. The most threatening backdoor attack…

Computation and Language · Computer Science 2022-02-17 Lingfeng Shen , Haiyun Jiang , Lemao Liu , Shuming Shi

Backdoor attacks have become a major security threat for deploying machine learning models in security-critical applications. Existing research endeavors have proposed many defenses against backdoor attacks. Despite demonstrating certain…

Machine Learning · Computer Science 2023-11-28 Hengzhi Pei , Jinyuan Jia , Wenbo Guo , Bo Li , Dawn Song

Backdoor attacks pose a significant threat to Large Language Models (LLMs), where adversaries can embed hidden triggers to manipulate LLM's outputs. Most existing defense methods, primarily designed for classification tasks, are ineffective…

Cryptography and Security · Computer Science 2025-11-12 Zihan Wang , Rui Zhang , Hongwei Li , Wenshu Fan , Wenbo Jiang , Qingchuan Zhao , Guowen Xu

Backdoor attacks pose a serious security threat for training neural networks as they surreptitiously introduce hidden functionalities into a model. Such backdoors remain silent during inference on clean inputs, evading detection due to…

Cryptography and Security · Computer Science 2023-12-15 Lukas Struppek , Martin B. Hentschel , Clifton Poth , Dominik Hintersdorf , Kristian Kersting

Deep reinforcement learning (DRL) algorithms have recently gained wide attention in the wireless networks domain. They are considered promising approaches for solving dynamic radio resource management (RRM) problems in next-generation…

Networking and Internet Architecture · Computer Science 2022-09-29 Ahmad M. Nagib , Hatem Abou-zeid , Hossam S. Hassanein