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Semi-supervised learning (SSL) has achieved remarkable performance with a small fraction of labeled data by leveraging vast amounts of unlabeled data from the Internet. However, this large pool of untrusted data is extremely vulnerable to…

Computer Vision and Pattern Recognition · Computer Science 2024-12-05 Cheng-Yi Lee , Ching-Chia Kao , Cheng-Han Yeh , Chun-Shien Lu , Chia-Mu Yu , Chu-Song Chen

Backdoor attacks are among the most effective, practical, and stealthy attacks in deep learning. In this paper, we consider a practical scenario where a developer obtains a deep model from a third party and uses it as part of a…

Cryptography and Security · Computer Science 2025-03-28 Dorde Popovic , Amin Sadeghi , Ting Yu , Sanjay Chawla , Issa Khalil

Deep neural networks (DNNs) are known vulnerable to backdoor attacks, a training time attack that injects a trigger pattern into a small proportion of training data so as to control the model's prediction at the test time. Backdoor attacks…

Machine Learning · Computer Science 2021-01-28 Yige Li , Xixiang Lyu , Nodens Koren , Lingjuan Lyu , Bo Li , Xingjun Ma

Text-to-image diffusion models are increasingly vulnerable to backdoor attacks, where malicious modifications to the training data cause the model to generate unintended outputs when specific triggers are present. While classification…

Cryptography and Security · Computer Science 2025-04-29 Abha Jha , Ashwath Vaithinathan Aravindan , Matthew Salaway , Atharva Sandeep Bhide , Duygu Nur Yaldiz

Federated Learning (FL) allows multiple clients to collaboratively train a Neural Network (NN) model on their private data without revealing the data. Recently, several targeted poisoning attacks against FL have been introduced. These…

Cryptography and Security · Computer Science 2022-01-04 Phillip Rieger , Thien Duc Nguyen , Markus Miettinen , Ahmad-Reza Sadeghi

Deep neural networks (DNNs) are susceptible to backdoor attacks, where adversaries poison datasets with adversary-specified triggers to implant hidden backdoors, enabling malicious manipulation of model predictions. Dataset purification…

Cryptography and Security · Computer Science 2025-06-24 Linshan Hou , Wei Luo , Zhongyun Hua , Songhua Chen , Leo Yu Zhang , Yiming Li

Recent researches show that deep learning model is susceptible to backdoor attacks. Many defenses against backdoor attacks have been proposed. However, existing defense works require high computational overhead or backdoor attack…

Computer Vision and Pattern Recognition · Computer Science 2023-05-26 Mingfu Xue , Yinghao Wu , Zhiyu Wu , Yushu Zhang , Jian Wang , Weiqiang Liu

Machine unlearning aims to remove targeted knowledge from a trained model without the cost of retraining from scratch. In class unlearning, however, reducing accuracy on forget classes does not necessarily imply true forgetting: forgotten…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Arman Hatami , Romina Aalishah , Ilya E. Monosov

Backdoor attacks, in which a model behaves maliciously when given an attacker-specified trigger, pose a major security risk for practitioners who depend on publicly released language models. As a countermeasure, backdoor detection methods…

Computation and Language · Computer Science 2025-09-23 Jun Yan , Wenjie Jacky Mo , Xiang Ren , Robin Jia

Multimodal contrastive pretraining has been used to train multimodal representation models, such as CLIP, on large amounts of paired image-text data. However, previous studies have revealed that such models are vulnerable to backdoor…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Hritik Bansal , Nishad Singhi , Yu Yang , Fan Yin , Aditya Grover , Kai-Wei Chang

Recently, a backdoor data poisoning attack was proposed, which adds mislabeled examples to the training set, with an embedded backdoor pattern, aiming to have the classifier learn to classify to a target class whenever the backdoor pattern…

Machine Learning · Computer Science 2023-07-17 Zhen Xiang , David J. Miller , Hang Wang , George Kesidis

Web-scraped datasets are vulnerable to data poisoning, which can be used for backdooring deep image classifiers during training. Since training on large datasets is expensive, a model is trained once and re-used many times. Unlike…

Machine Learning · Computer Science 2024-01-23 Benjamin Schneider , Nils Lukas , Florian Kerschbaum

The generalization bound is a crucial theoretical tool for assessing the generalizability of learning methods and there exist vast literatures on generalizability of normal learning, adversarial learning, and data poisoning. Unlike other…

Machine Learning · Computer Science 2024-06-05 Lijia Yu , Shuang Liu , Yibo Miao , Xiao-Shan Gao , Lijun Zhang

Backdoor attacks aim to surreptitiously insert malicious triggers into DNN models, granting unauthorized control during testing scenarios. Existing methods lack robustness against defense strategies and predominantly focus on enhancing…

Cryptography and Security · Computer Science 2024-12-03 Pengfei He , Yue Xing , Han Xu , Jie Ren , Yingqian Cui , Shenglai Zeng , Jiliang Tang , Makoto Yamada , Mohammad Sabokrou

Neural networks are widely known to be vulnerable to backdoor attacks, a method that poisons a portion of the training data to make the target model perform well on normal data sets, while outputting attacker-specified or random categories…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Yong Li , Han Gao

Recent studies have exposed that GNNs are vulnerable to several adversarial attacks, among which backdoor attack is one of the toughest. Similar to Deep Neural Networks (DNNs), backdoor attacks in GNNs lie in the fact that the attacker…

Cryptography and Security · Computer Science 2024-11-14 Jiale Zhang , Chengcheng Zhu , Bosen Rao , Hao Sui , Xiaobing Sun , Bing Chen , Chunyi Zhou , Shouling Ji

Recently, self-supervised learning (SSL) was shown to be vulnerable to patch-based data poisoning backdoor attacks. It was shown that an adversary can poison a small part of the unlabeled data so that when a victim trains an SSL model on…

Computer Vision and Pattern Recognition · Computer Science 2023-04-05 Ajinkya Tejankar , Maziar Sanjabi , Qifan Wang , Sinong Wang , Hamed Firooz , Hamed Pirsiavash , Liang Tan

Large Language Models (LLMs), which bridge the gap between human language understanding and complex problem-solving, achieve state-of-the-art performance on several NLP tasks, particularly in few-shot and zero-shot settings. Despite the…

Cryptography and Security · Computer Science 2025-01-07 Shuai Zhao , Meihuizi Jia , Zhongliang Guo , Leilei Gan , Xiaoyu Xu , Xiaobao Wu , Jie Fu , Yichao Feng , Fengjun Pan , Luu Anh Tuan

Deep Neural Networks are well known to be vulnerable to adversarial attacks and backdoor attacks, where minor modifications on the input are able to mislead the models to give wrong results. Although defenses against adversarial attacks…

Machine Learning · Computer Science 2022-08-01 Kaidi Jin , Tianwei Zhang , Chao Shen , Yufei Chen , Ming Fan , Chenhao Lin , Ting Liu

Machine unlearning for security is studied in this context. Several spam email detection methods exist, each of which employs a different algorithm to detect undesired spam emails. But these models are vulnerable to attacks. Many attackers…

Machine Learning · Computer Science 2021-12-28 Nishchal Parne , Kyathi Puppaala , Nithish Bhupathi , Ripon Patgiri