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Retrieval-Augmented Generation (RAG) enhances large language models (LLMs) by incorporating external knowledge, but its openness introduces vulnerabilities that can be exploited by poisoning attacks. Existing poisoning methods for RAG…

Cryptography and Security · Computer Science 2025-05-27 Chunyang Li , Junwei Zhang , Anda Cheng , Zhuo Ma , Xinghua Li , Jianfeng Ma

The transferability of adversarial examples across deep neural networks (DNNs) is the crux of many black-box attacks. Many prior efforts have been devoted to improving the transferability via increasing the diversity in inputs of some…

Machine Learning · Computer Science 2023-07-20 Qizhang Li , Yiwen Guo , Wangmeng Zuo , Hao Chen

Training robust deep learning models for down-stream tasks is a critical challenge. Research has shown that down-stream models can be easily fooled with adversarial inputs that look like the training data, but slightly perturbed, in a way…

Machine Learning · Computer Science 2021-01-19 Mahmoud Hossam , Trung Le , He Zhao , Dinh Phung

NLP researchers propose different word-substitute black-box attacks that can fool text classification models. In such attack, an adversary keeps sending crafted adversarial queries to the target model until it can successfully achieve the…

Computation and Language · Computer Science 2022-06-13 Tianle Li , Yi Yang

Machine Learning systems are vulnerable to adversarial attacks and will highly likely produce incorrect outputs under these attacks. There are white-box and black-box attacks regarding to adversary's access level to the victim learning…

Machine Learning · Computer Science 2019-10-23 Saeid Samizade , Zheng-Hua Tan , Chao Shen , Xiaohong Guan

Adversarial examples expose the vulnerabilities of natural language processing (NLP) models, and can be used to evaluate and improve their robustness. Existing techniques of generating such examples are typically driven by local heuristic…

Computation and Language · Computer Science 2021-03-16 Dianqi Li , Yizhe Zhang , Hao Peng , Liqun Chen , Chris Brockett , Ming-Ting Sun , Bill Dolan

Collaborative multi-agent reinforcement learning has rapidly evolved, offering state-of-the-art algorithms for real-world applications, including sensitive domains. However, a key challenge to its widespread adoption is the lack of a…

Machine Learning · Computer Science 2026-01-22 Amine Andam , Jamal Bentahar , Mustapha Hedabou

Safety classifiers are essential safeguards within generative AI systems, filtering harmful content or identifying at-risk users when interacting with large language models. Despite their necessity, these models are trained on sensitive…

Machine Learning · Computer Science 2026-05-25 Anthony Hughes , Alexander Goldberg , Prince Jha , Adam Perer , Nikolaos Aletras , Niloofar Mireshghallah

Reinforcement learning (RL) has achieved remarkable success in fields like robotics and autonomous driving, but adversarial attacks designed to mislead RL systems remain challenging. Existing approaches often rely on modifying the…

Machine Learning · Computer Science 2025-07-25 Junyong Jiang , Buwei Tian , Chenxing Xu , Songze Li , Lu Dong

Deep neural network (DNN) as a popular machine learning model is found to be vulnerable to adversarial attack. This attack constructs adversarial examples by adding small perturbations to the raw input, while appearing unmodified to human…

Machine Learning · Computer Science 2018-09-14 Pengcheng Li , Jinfeng Yi , Lijun Zhang

Although deep neural networks (DNNs) have achieved success in many application fields, it is still vulnerable to imperceptible adversarial examples that can lead to misclassification of DNNs easily. To overcome this challenge, many…

Machine Learning · Computer Science 2020-08-11 Yaguan Qian , Ximin Zhang , Bin Wang , Wei Li , Zhaoquan Gu , Haijiang Wang , Wassim Swaileh

In generating adversarial examples, the conventional black-box attack methods rely on sufficient feedback from the to-be-attacked models by repeatedly querying until the attack is successful, which usually results in thousands of trials…

Computer Vision and Pattern Recognition · Computer Science 2023-12-13 Renyang Liu , Wei Zhou , Xin Jin , Song Gao , Yuanyu Wang , Ruxin Wang

In practice, metric analysis on a specific train and test dataset does not guarantee reliable or fair ML models. This is partially due to the fact that obtaining a balanced, diverse, and perfectly labeled dataset is typically expensive,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-24 Jinqi Luo , Zhaoning Wang , Chen Henry Wu , Dong Huang , Fernando De la Torre

In recent years, machine learning models, especially deep neural networks, have been widely used for classification tasks in the security domain. However, these models have been shown to be vulnerable to adversarial manipulation: small…

Cryptography and Security · Computer Science 2024-03-12 Dong Qin , George Amariucai , Daji Qiao , Yong Guan

Deep neural networks (DNNs) have demonstrated excellent performance on various tasks, however they are under the risk of adversarial examples that can be easily generated when the target model is accessible to an attacker (white-box…

Machine Learning · Computer Science 2020-09-28 Yang Bai , Yuyuan Zeng , Yong Jiang , Yisen Wang , Shu-Tao Xia , Weiwei Guo

Text classifiers are vulnerable to adversarial examples -- correctly-classified examples that are deliberately transformed to be misclassified while satisfying acceptability constraints. The conventional approach to finding adversarial…

Computation and Language · Computer Science 2024-05-21 Tom Roth , Inigo Jauregi Unanue , Alsharif Abuadbba , Massimo Piccardi

Adversarial attacks are carried out to reveal the vulnerability of deep neural networks. Textual adversarial attacking is challenging because text is discrete and a small perturbation can bring significant change to the original input.…

Computation and Language · Computer Science 2020-12-10 Yuan Zang , Fanchao Qi , Chenghao Yang , Zhiyuan Liu , Meng Zhang , Qun Liu , Maosong Sun

Adversarial examples have posed a severe threat to deep neural networks due to their transferable nature. Currently, various works have paid great efforts to enhance the cross-model transferability, which mostly assume the substitute model…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Qilong Zhang , Xiaodan Li , Yuefeng Chen , Jingkuan Song , Lianli Gao , Yuan He , Hui Xue

GAN is a deep-learning based generative approach to generate contents such as images, languages and speeches. Recently, studies have shown that GAN can also be applied to generative adversarial attack examples to fool the machine-learning…

Machine Learning · Computer Science 2019-11-15 Feng Chen , Yunkai Shang , Bo Xu , Jincheng Hu

Pre-trained language models (PLMs) have been widely used to underpin various downstream tasks. However, the adversarial attack task has found that PLMs are vulnerable to small perturbations. Mainstream methods adopt a detached two-stage…

Computation and Language · Computer Science 2023-05-30 Xuanjie Fang , Sijie Cheng , Yang Liu , Wei Wang