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As object detection becomes integral to many safety-critical applications, understanding its vulnerabilities is essential. Backdoor attacks, in particular, pose a serious threat by implanting hidden triggers in victim models, which…

Cryptography and Security · Computer Science 2025-03-14 Jialin Lu , Junjie Shan , Ziqi Zhao , Ka-Ho Chow

As object detection becomes integral to many safety-critical applications, understanding its vulnerabilities is essential. Backdoor attacks, in particular, pose a serious threat by implanting hidden triggers in victim models, which…

Cryptography and Security · Computer Science 2025-03-17 Jialin Lu , Junjie Shan , Ziqi Zhao , Ka-Ho Chow

Backdoor attacks have emerged as one of the major security threats to deep learning models as they can easily control the model's test-time predictions by pre-injecting a backdoor trigger into the model at training time. While backdoor…

Machine Learning · Computer Science 2023-02-07 Yujing Jiang , Xingjun Ma , Sarah Monazam Erfani , James Bailey

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

Backdoor attacks represent a subtle yet effective class of cyberattacks targeting AI models, primarily due to their stealthy nature. The model behaves normally on clean data but exhibits malicious behavior only when the attacker embeds a…

Machine Learning · Computer Science 2025-09-29 Sujeevan Aseervatham , Achraf Kerzazi , Younès Bennani

Vision-Language-Action (VLA) models have advanced robotic control by enabling end-to-end decision-making directly from multimodal inputs. However, their tightly coupled architectures expose novel security vulnerabilities. Unlike traditional…

Cryptography and Security · Computer Science 2025-05-23 Xueyang Zhou , Guiyao Tie , Guowen Zhang , Hechang Wang , Pan Zhou , Lichao Sun

Recently, the newly emerged multimodal models, which leverage both visual and linguistic modalities to train powerful encoders, have gained increasing attention. However, learning from a large-scale unlabeled dataset also exposes the model…

Cryptography and Security · Computer Science 2023-06-06 Ziqing Yang , Xinlei He , Zheng Li , Michael Backes , Mathias Humbert , Pascal Berrang , Yang Zhang

Recent deep-learning-based compression methods have achieved superior performance compared with traditional approaches. However, deep learning models have proven to be vulnerable to backdoor attacks, where some specific trigger patterns…

Computer Vision and Pattern Recognition · Computer Science 2023-03-01 Yi Yu , Yufei Wang , Wenhan Yang , Shijian Lu , Yap-peng Tan , Alex C. Kot

Open-vocabulary object detectors (OVODs) unify vision and language to detect arbitrary object categories based on text prompts, enabling strong zero-shot generalization to novel concepts. As these models gain traction in high-stakes…

Computer Vision and Pattern Recognition · Computer Science 2026-01-14 Ankita Raj , Chetan Arora

Backdoor attacks have been shown to be a serious threat against deep learning systems such as biometric authentication and autonomous driving. An effective backdoor attack could enforce the model misbehave under certain predefined…

Cryptography and Security · Computer Science 2021-12-01 Tong Wang , Yuan Yao , Feng Xu , Shengwei An , Hanghang Tong , Ting Wang

Medical Visual Question Answering (MedVQA) aims to generate clinically reliable answers conditioned on complex medical images and questions. However, existing methods often overfit to superficial cross-modal correlations, neglecting the…

Computer Vision and Pattern Recognition · Computer Science 2026-04-23 Zibo Xu , Qiang Li , Ke Lu , Jin Wang , Weizhi Nie , Yuting Su

Deep neural networks are vulnerable to adversarial attacks, such as backdoor attacks in which a malicious adversary compromises a model during training such that specific behaviour can be triggered at test time by attaching a specific word…

Cryptography and Security · Computer Science 2022-10-21 You Guo , Jun Wang , Trevor Cohn

Large language models (LLMs) have raised concerns about potential security threats despite performing significantly in Natural Language Processing (NLP). Backdoor attacks initially verified that LLM is doing substantial harm at all stages,…

Cryptography and Security · Computer Science 2024-07-09 Pengzhou Cheng , Yidong Ding , Tianjie Ju , Zongru Wu , Wei Du , Ping Yi , Zhuosheng Zhang , Gongshen Liu

Deep neural networks (DNNs) can be manipulated to exhibit specific behaviors when exposed to specific trigger patterns, without affecting their performance on benign samples, dubbed \textit{backdoor attack}. Currently, implementing backdoor…

Computer Vision and Pattern Recognition · Computer Science 2024-06-25 Ruotong Wang , Hongrui Chen , Zihao Zhu , Li Liu , Baoyuan Wu

Deep learning models have been deployed in numerous real-world applications such as autonomous driving and surveillance. However, these models are vulnerable in adversarial environments. Backdoor attack is emerging as a severe security…

Computer Vision and Pattern Recognition · Computer Science 2022-05-31 Shih-Han Chan , Yinpeng Dong , Jun Zhu , Xiaolu Zhang , Jun Zhou

Deep neural networks (DNNs) are vulnerable to a class of attacks called "backdoor attacks", which create an association between a backdoor trigger and a target label the attacker is interested in exploiting. A backdoored DNN performs well…

Computer Vision and Pattern Recognition · Computer Science 2023-01-23 Hasan Abed Al Kader Hammoud , Shuming Liu , Mohammed Alkhrashi , Fahad AlBalawi , Bernard Ghanem

Backdoors pose a serious threat to machine learning, as they can compromise the integrity of security-critical systems, such as self-driving cars. While different defenses have been proposed to address this threat, they all rely on the…

Cryptography and Security · Computer Science 2025-02-04 Alexander Warnecke , Julian Speith , Jan-Niklas Möller , Konrad Rieck , Christof Paar

Trojan backdoors can be injected into large language models at various stages, including pretraining, fine-tuning, and in-context learning, posing a significant threat to the model's alignment. Due to the nature of causal language modeling,…

Computation and Language · Computer Science 2025-01-22 Vedant Bhasin , Matthew Yudin , Razvan Stefanescu , Rauf Izmailov

As deep neural networks and the datasets used to train them get larger, the default approach to integrating them into research and commercial projects is to download a pre-trained model and fine tune it. But these models can have uncertain…

Machine Learning · Computer Science 2024-01-12 Khondoker Murad Hossain , Tim Oates

Machine learning models that use deep neural networks (DNNs) are vulnerable to backdoor attacks. An adversary carrying out a backdoor attack embeds a predefined perturbation called a trigger into a small subset of input samples and trains…

Cryptography and Security · Computer Science 2023-09-06 Arezoo Rajabi , Surudhi Asokraj , Fengqing Jiang , Luyao Niu , Bhaskar Ramasubramanian , Jim Ritcey , Radha Poovendran