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Deep neural network ensembles hold the potential of improving generalization performance for complex learning tasks. This paper presents formal analysis and empirical evaluation to show that heterogeneous deep ensembles with high ensemble…

Computer Vision and Pattern Recognition · Computer Science 2023-10-04 Yanzhao Wu , Ka-Ho Chow , Wenqi Wei , Ling Liu

The recent wave of AI research has enabled a new brand of synthetic media, called deepfakes. Deepfakes have impressive photorealism, which has generated exciting new use cases but also raised serious threats to our increasingly digital…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Nikolaos Giatsoglou , Symeon Papadopoulos , Ioannis Kompatsiaris

Model ensemble adversarial attack has become a powerful method for generating transferable adversarial examples that can target even unknown models, but its theoretical foundation remains underexplored. To address this gap, we provide early…

Machine Learning · Computer Science 2025-05-29 Wei Yao , Zeliang Zhang , Huayi Tang , Yong Liu

Machine learning algorithms, however effective, are known to be vulnerable in adversarial scenarios where a malicious user may inject manipulated instances. In this work we focus on evasion attacks, where a model is trained in a safe…

Machine Learning · Computer Science 2020-04-08 Stefano Calzavara , Claudio Lucchese , Federico Marcuzzi , Salvatore Orlando

In recent years, deep learning (DL) models have achieved significant progress in many domains, such as autonomous driving, facial recognition, and speech recognition. However, the vulnerability of deep learning models to adversarial attacks…

Cryptography and Security · Computer Science 2023-04-19 Feng Guo , Zheng Sun , Yuxuan Chen , Lei Ju

Deep learning models are used in safety-critical tasks such as automated driving and face recognition. However, small perturbations in the model input can significantly change the predictions. Adversarial attacks are used to identify small…

Cryptography and Security · Computer Science 2025-12-03 Issa Oe , Keiichiro Yamamura , Hiroki Ishikura , Ryo Hamahira , Katsuki Fujisawa

We consider adversarial attacks to a black-box model when no queries are allowed. In this setting, many methods directly attack surrogate models and transfer the obtained adversarial examples to fool the target model. Plenty of previous…

Machine Learning · Computer Science 2021-09-08 Yunxiao Qin , Yuanhao Xiong , Jinfeng Yi , Cho-Jui Hsieh

Adversarial attacks have threatened the application of deep neural networks in security-sensitive scenarios. Most existing black-box attacks fool the target model by interacting with it many times and producing global perturbations.…

Computer Vision and Pattern Recognition · Computer Science 2021-01-05 Tao Xiang , Hangcheng Liu , Shangwei Guo , Tianwei Zhang , Xiaofeng Liao

Recent works have shown that deep neural networks are vulnerable to adversarial examples that find samples close to the original image but can make the model misclassify. Even with access only to the model's output, an attacker can employ…

Machine Learning · Computer Science 2023-10-03 Quang H. Nguyen , Yingjie Lao , Tung Pham , Kok-Seng Wong , Khoa D. Doan

Recent advances show that deep neural networks are not robust to deliberately crafted adversarial examples which many are generated by adding human imperceptible perturbation to clear input. Consider $l_2$ norms attacks, Project Gradient…

Machine Learning · Computer Science 2019-06-11 Fanyou Wu , Rado Gazo , Eva Haviarova , Bedrich Benes

Despite being effective in many application areas, Deep Neural Networks (DNNs) are vulnerable to being attacked. In object recognition, the attack takes the form of a small perturbation added to an image, that causes the DNN to misclassify,…

Machine Learning · Computer Science 2025-01-14 T. Windeatt

Black box attacks, where adversaries have limited knowledge of the target model, pose a significant threat to machine learning systems. Adversarial examples generated with a substitute model often suffer from limited transferability to the…

Machine Learning · Computer Science 2024-10-22 Bar Avraham , Yisroel Mirsky

We present a novel black-box jailbreaking framework that integrates multiple LLM-as-Attacker strategies to deliver highly transferable and effective attacks. The framework is grounded in three key insights from prior jailbreaking research…

Cryptography and Security · Computer Science 2025-11-07 Yiqi Yang , Hongye Fu

Adversarial perturbations can deceive neural networks by adding small, imperceptible noise to the input. Recent object trackers with transformer backbones have shown strong performance on tracking datasets, but their adversarial robustness…

Computer Vision and Pattern Recognition · Computer Science 2024-11-27 Fatemeh Nourilenjan Nokabadi , Yann Batiste Pequignot , Jean-Francois Lalonde , Christian Gagné

Ensemble methods exploit the availability of a given number of classifiers or detectors trained in single or multiple source domains and tasks to address machine learning problems such as domain adaptation or multi-source transfer learning.…

Computer Vision and Pattern Recognition · Computer Science 2024-06-04 Erik Isai Valle Salgado , Chen Li , Yaqi Han , Linchao Shi , Xinghui Li

Deep neural network (DNN) has demonstrated its success in multiple domains. However, DNN models are inherently vulnerable to adversarial examples, which are generated by adding adversarial perturbations to benign inputs to fool the DNN…

Machine Learning · Computer Science 2019-10-07 Wenqi Wei , Ling Liu , Margaret Loper , Ka-Ho Chow , Emre Gursoy , Stacey Truex , Yanzhao Wu

In clinical settings, we often face the challenge of building prediction models based on small observational data sets. For example, such a data set might be from a medical center in a multi-center study. Differences between centers might…

Machine Learning (ML) and Deep Learning (DL) models have achieved state-of-the-art performance on multiple learning tasks, from vision to natural language modelling. With the growing adoption of ML and DL to many areas of computer science,…

Machine Learning · Computer Science 2019-06-11 Anshuman Chhabra , Abhishek Roy , Prasant Mohapatra

Modern applications of artificial neural networks have yielded remarkable performance gains in a wide range of tasks. However, recent studies have discovered that such modelling strategy is vulnerable to Adversarial Examples, i.e. examples…

Computer Vision and Pattern Recognition · Computer Science 2019-04-24 João Monteiro , Isabela Albuquerque , Zahid Akhtar , Tiago H. Falk

Black-box attacks can generate adversarial examples without accessing the parameters of target model, largely exacerbating the threats of deployed deep neural networks (DNNs). However, previous works state that black-box attacks fail to…

Machine Learning · Computer Science 2022-10-12 Chenghao Sun , Yonggang Zhang , Wan Chaoqun , Qizhou Wang , Ya Li , Tongliang Liu , Bo Han , Xinmei Tian