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A backdoor or Trojan attack is an important type of data poisoning attack against deep neural network (DNN) classifiers, wherein the training dataset is poisoned with a small number of samples that each possess the backdoor pattern (usually…

Machine Learning · Computer Science 2023-03-15 H. Wang , S. Karami , O. Dia , H. Ritter , E. Emamjomeh-Zadeh , J. Chen , Z. Xiang , D. J. Miller , G. Kesidis

The rapid progress of graph generation has raised new security concerns, particularly regarding backdoor vulnerabilities. Though prior work has explored backdoor attacks against diffusion models for image or unconditional graph generation,…

Machine Learning · Computer Science 2026-04-24 Liang Ye , Shengqin Chen , Jiazhu Dai

As generative models achieve great success, tampering and modifying the sensitive image contents (i.e., human faces, artist signatures, commercial logos, etc.) have induced a significant threat with social impact. The backdoor attack is a…

Cryptography and Security · Computer Science 2024-10-22 Haichuan Zhang , Meiyu Lin , Zhaoyi Liu , Renyuan Li , Zhiyuan Cheng , Carl Yang , Mingjie Tang

Diffusion Models (DMs) are state-of-the-art generative models that learn a reversible corruption process from iterative noise addition and denoising. They are the backbone of many generative AI applications, such as text-to-image…

Cryptography and Security · Computer Science 2024-01-01 Sheng-Yen Chou , Pin-Yu Chen , Tsung-Yi Ho

While diffusion models have revolutionized visual content generation, their rapid adoption has underscored the critical need to investigate vulnerabilities, e.g., to backdoor attacks. In multimodal diffusion models, it is natural to expect…

Machine Learning · Computer Science 2026-03-09 Qitong Wang , Haoran Dai , Haotian Zhang , Christopher Rasmussen , Binghui Wang

Image anomaly detection (IAD) is essential in applications such as industrial inspection, medical imaging, and security. Despite the progress achieved with deep learning models like Deep Semi-Supervised Anomaly Detection (DeepSAD), these…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 He Cheng , Depeng Xu , Shuhan Yuan

Text-to-Image (T2I) models generate high-quality images but are vulnerable to malicious backdoor attacks that inject harmful biases (e.g., trigger-activated gender or racial stereotypes). Existing debiasing methods, often designed for…

Computer Vision and Pattern Recognition · Computer Science 2026-03-02 Hongyi Cai , Mohammad Mahdinur Rahman , Mingkang Dong , Muxin Pu , Moqyad Alqaily , Jie Li , Xinfeng Li , Jialie Shen , Meikang Qiu , Qingsong Wen

Multimodal Large Language Models (MLLMs) have achieved remarkable success in cross-modal understanding and generation, yet their deployment is threatened by critical safety vulnerabilities. While prior works have demonstrated the…

Cryptography and Security · Computer Science 2026-04-22 Kun Wang , Cheng Qian , Miao Yu , Lilan Peng , Liang Lin , Jiaming Zhang , Tianyu Zhang , Yu Cheng , Yang Wang

The commercialization of text-to-image diffusion models (DMs) brings forth potential copyright concerns. Despite numerous attempts to protect DMs from copyright issues, the vulnerabilities of these solutions are underexplored. In this…

Cryptography and Security · Computer Science 2024-05-28 Haonan Wang , Qianli Shen , Yao Tong , Yang Zhang , Kenji Kawaguchi

Consistency models are a new class of models that generate images by directly mapping noise to data, allowing for one-step generation and significantly accelerating the sampling process. However, their robustness against adversarial attacks…

Cryptography and Security · Computer Science 2025-02-18 Chengen Wang , Murat Kantarcioglu

Deep neural networks have been shown to exhibit an intriguing vulnerability to adversarial input images corrupted with imperceptible perturbations. However, the majority of adversarial attacks assume global, fine-grained control over the…

Computer Vision and Pattern Recognition · Computer Science 2019-08-19 Ameya Joshi , Amitangshu Mukherjee , Soumik Sarkar , Chinmay Hegde

Deep Learning backdoor attacks have a threat model similar to traditional cyber attacks. Attack forensics, a critical counter-measure for traditional cyber attacks, is hence of importance for defending model backdoor attacks. In this paper,…

Cryptography and Security · Computer Science 2023-01-18 Siyuan Cheng , Guanhong Tao , Yingqi Liu , Shengwei An , Xiangzhe Xu , Shiwei Feng , Guangyu Shen , Kaiyuan Zhang , Qiuling Xu , Shiqing Ma , Xiangyu Zhang

Backdoor attacks pose an important security threat to textual large language models. Exploring textual backdoor attacks not only helps reveal the potential security risks of models, but also promotes innovation and development of defense…

Cryptography and Security · Computer Science 2025-07-21 Yang Hou , Qiuling Yue , Lujia Chai , Guozhao Liao , Wenbao Han , Wei Ou

Backdoor attacks have been considered a severe security threat to deep learning. Such attacks can make models perform abnormally on inputs with predefined triggers and still retain state-of-the-art performance on clean data. While backdoor…

Machine Learning · Computer Science 2022-01-27 Yi Zeng , Won Park , Z. Morley Mao , Ruoxi Jia

Deep neural networks (DNNs) are vulnerable to backdoor attacks, where a backdoored model behaves normally with clean inputs but exhibits attacker-specified behaviors upon the inputs containing triggers. Most previous backdoor attacks mainly…

Cryptography and Security · Computer Science 2024-07-02 Linshan Hou , Zhongyun Hua , Yuhong Li , Yifeng Zheng , Leo Yu Zhang

Speech language models (SLMs) are systems of systems: independent components that unite to achieve a common goal. Despite their heterogeneous nature, SLMs are often studied end-to-end; how information flows through the pipeline remains…

Computation and Language · Computer Science 2026-04-08 Alexandrine Fortier , Thomas Thebaud , Jesús Villalba , Najim Dehak , Patrick Cardinal , Peter West

Recently, Text-to-Image (T2I) synthesis technology has made tremendous strides. Numerous representative T2I models have emerged and achieved promising application outcomes, such as DALL-E, Stable Diffusion, Imagen, etc. In practice, it has…

Cryptography and Security · Computer Science 2025-09-24 Wenbo Jiang , Jiaming He , Hongwei Li , Rui Zhang , Hanxiao Chen , Meng Hao , Haomiao Yang , Qingchuan Zhao , Guowen Xu

Thanks to their remarkable denoising capabilities, diffusion models are increasingly being employed as defensive tools to reinforce the security of other models, notably in purifying adversarial examples and certifying adversarial…

Cryptography and Security · Computer Science 2024-06-17 Changjiang Li , Ren Pang , Bochuan Cao , Jinghui Chen , Fenglong Ma , Shouling Ji , Ting Wang

Pre-trained vision models (PVMs) have become a dominant component due to their exceptional performance when fine-tuned for downstream tasks. However, the presence of backdoors within PVMs poses significant threats. Unfortunately, existing…

Computer Vision and Pattern Recognition · Computer Science 2023-12-27 Aishan Liu , Xinwei Zhang , Yisong Xiao , Yuguang Zhou , Siyuan Liang , Jiakai Wang , Xianglong Liu , Xiaochun Cao , Dacheng Tao

The success of deep learning has enabled advances in multimodal tasks that require non-trivial fusion of multiple input domains. Although multimodal models have shown potential in many problems, their increased complexity makes them more…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Matthew Walmer , Karan Sikka , Indranil Sur , Abhinav Shrivastava , Susmit Jha