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Deep neural networks (DNNs) are vulnerable to adversarial perturbation, where an imperceptible perturbation is added to the image that can fool the DNNs. Diffusion-based adversarial purification focuses on using the diffusion model to…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Kaiyu Song , Hanjiang Lai

Adversarial attacks have become a well-explored domain, frequently serving as evaluation baselines for model robustness. Among these, black-box attacks based on transferability have received significant attention due to their practical…

Machine Learning · Computer Science 2025-05-26 Chun Tong Lei , Zhongliang Guo , Hon Chung Lee , Minh Quoc Duong , Chun Pong Lau

Neural networks have achieved remarkable performance across a wide range of tasks, yet they remain susceptible to adversarial perturbations, which pose significant risks in safety-critical applications. With the rise of multimodality,…

Computer Vision and Pattern Recognition · Computer Science 2024-10-21 Xinxin Liu , Zhongliang Guo , Siyuan Huang , Chun Pong Lau

Adversarial attacks meticulously generate minuscule, imperceptible perturbations to images to deceive neural networks. Counteracting these, adversarial purification methods seek to transform adversarial input samples into clean output…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Sitong Liu , Zhichao Lian , Shuangquan Zhang , Liang Xiao

The improvement of language model robustness, including successful defense against adversarial attacks, remains an open problem. In computer vision settings, the stochastic noising and de-noising process provided by diffusion models has…

Machine Learning · Computer Science 2024-06-21 Harrison Gietz , Jugal Kalita

Real-time transient event identification is essential for power system situational awareness and protection. The increased penetration of Phasor Measurement Units (PMUs) enhance power system visualization and real time monitoring and…

Signal Processing · Electrical Eng. & Systems 2018-12-04 Rui Ma , Sagnik Basumallik , Sara Eftekharnejad

Recently, automatic speaker verification (ASV) based on deep learning is easily contaminated by adversarial attacks, which is a new type of attack that injects imperceptible perturbations to audio signals so as to make ASV produce wrong…

Audio and Speech Processing · Electrical Eng. & Systems 2024-07-10 Yibo Bai , Xiao-Lei Zhang , Xuelong Li

Adversarial purification is a defense mechanism for safeguarding classifiers against adversarial attacks without knowing the type of attacks or training of the classifier. These techniques characterize and eliminate adversarial…

Cryptography and Security · Computer Science 2024-02-13 Raha Moraffah , Shubh Khandelwal , Amrita Bhattacharjee , Huan Liu

This paper introduces a machine learning-based approach to synthetically creating realistic phasor measurement unit (PMU) data streams of multiple transient types. In contrast to the existing literature of transient simulation-based data…

Signal Processing · Electrical Eng. & Systems 2020-04-08 Xiangtian Zheng , Bin Wang , Dileep Kalathil , Le Xie

Adversarial attacks induce misclassification by introducing subtle perturbations. Recently, diffusion models are applied to the image classifiers to improve adversarial robustness through adversarial training or by purifying adversarial…

Computer Vision and Pattern Recognition · Computer Science 2024-05-21 Yujie Li , Yanbin Wang , Haitao Xu , Bin Liu , Jianguo Sun , Zhenhao Guo , Wenrui Ma

While adversarial training is considered as a standard defense method against adversarial attacks for image classifiers, adversarial purification, which purifies attacked images into clean images with a standalone purification model, has…

Machine Learning · Computer Science 2021-06-14 Jongmin Yoon , Sung Ju Hwang , Juho Lee

Diffusion model (DM) based adversarial purification (AP) has proven to be a powerful defense method that can remove adversarial perturbations and generate a purified example without threats. In principle, the pre-trained DMs can only ensure…

Computer Vision and Pattern Recognition · Computer Science 2025-03-12 Guang Lin , Zerui Tao , Jianhai Zhang , Toshihisa Tanaka , Qibin Zhao

The diffusion-based adversarial purification methods attempt to drown adversarial perturbations into a part of isotropic noise through the forward process, and then recover the clean images through the reverse process. Due to the lack of…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Gaozheng Pei , Ke Ma , Yingfei Sun , Qianqian Xu , Qingming Huang

This paper studies robust event classification using imperfect real-world phasor measurement unit (PMU) data. By analyzing the real-world PMU data, we find it is challenging to directly use this dataset for event classifiers due to the low…

Machine Learning · Computer Science 2021-10-20 Yunchuan Liu , Lei Yang , Amir Ghasemkhani , Hanif Livani , Virgilio A. Centeno , Pin-Yu Chen , Junshan Zhang

We question the current evaluation practice on diffusion-based purification methods. Diffusion-based purification methods aim to remove adversarial effects from an input data point at test time. The approach gains increasing attention as an…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Minjong Lee , Dongwoo Kim

We propose a novel deterministic purification method to improve adversarial robustness by mapping a potentially adversarial sample toward a nearby sample that lies close to a mode of the data distribution, where classifiers are more…

Machine Learning · Computer Science 2026-02-09 Vinh Hoang , Sebastian Krumscheid , Holger Rauhut , Raúl Tempone

Adversarial attacks on deep-learning models pose a serious threat to their reliability and security. Existing defense mechanisms are narrow addressing a specific type of attack or being vulnerable to sophisticated attacks. We propose a new…

Machine Learning · Computer Science 2023-06-22 Mouna Rabhi , Roberto Di Pietro

Recognizing 3D point cloud plays a pivotal role in many real-world applications. However, deploying 3D point cloud deep learning model is vulnerable to adversarial attacks. Despite many efforts into developing robust model by adversarial…

Computer Vision and Pattern Recognition · Computer Science 2024-09-24 Jinpeng Lin , Xulei Yang , Tianrui Li , Xun Xu

Deep neural networks are widely used and exhibit excellent performance in many areas. However, they are vulnerable to adversarial attacks that compromise the network at the inference time by applying elaborately designed perturbation to…

Machine Learning · Computer Science 2019-03-05 Uiwon Hwang , Jaewoo Park , Hyemi Jang , Sungroh Yoon , Nam Ik Cho

Deep learning models are vulnerable to adversarial examples and make incomprehensible mistakes, which puts a threat on their real-world deployment. Combined with the idea of adversarial training, preprocessing-based defenses are popular and…

Computer Vision and Pattern Recognition · Computer Science 2021-10-18 Tao Bai , Jun Zhao , Lanqing Guo , Bihan Wen