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Large Language Models (LLMs) are valuable for text classification, but their vulnerabilities must not be disregarded. They lack robustness against adversarial examples, so it is pertinent to understand the impacts of different types of…

Computation and Language · Computer Science 2024-06-13 João Vitorino , Eva Maia , Isabel Praça

We attribute the vulnerability of natural language processing models to the fact that similar inputs are converted to dissimilar representations in the embedding space, leading to inconsistent outputs, and we propose a novel robust training…

Computation and Language · Computer Science 2022-07-28 Yichen Yang , Xiaosen Wang , Kun He

Adversarial attacks pose significant challenges to deep neural networks (DNNs) such as Transformer models in natural language processing (NLP). This paper introduces a novel defense strategy, called GenFighter, which enhances adversarial…

Machine Learning · Computer Science 2024-04-18 Md Athikul Islam , Edoardo Serra , Sushil Jajodia

Large language models (LLMs) are increasingly deployed as educational agents for automatic short answer grading (ASAG) in real-world educational environments, significantly boosting assessment efficiency and scalability. However, when these…

Cryptography and Security · Computer Science 2026-05-25 Xueyi Li , Zhuoneng Zhou , Zitao Liu , Yongdong Wu

Neural text detectors aim to decide the characteristics that distinguish neural (machine-generated) from human texts. To challenge such detectors, adversarial attacks can alter the statistical characteristics of the generated text, making…

Cryptography and Security · Computer Science 2023-02-14 Gongbo Liang , Jesus Guerrero , Izzat Alsmadi

Warning: this paper contains content that maybe offensive or upsetting. Recent research in Natural Language Processing (NLP) has advanced the development of various toxicity detection models with the intention of identifying and mitigating…

Computation and Language · Computer Science 2022-05-06 Ninareh Mehrabi , Ahmad Beirami , Fred Morstatter , Aram Galstyan

Attackers create adversarial text to deceive both human perception and the current AI systems to perform malicious purposes such as spam product reviews and fake political posts. We investigate the difference between the adversarial and the…

Computation and Language · Computer Science 2019-12-20 Hoang-Quoc Nguyen-Son , Tran Phuong Thao , Seira Hidano , Shinsaku Kiyomoto

Adversarial attacks expose vulnerabilities of deep learning models by introducing minor perturbations to the input, which lead to substantial alterations in the output. Our research focuses on the impact of such adversarial attacks on…

Computation and Language · Computer Science 2023-09-14 Pavel Burnyshev , Elizaveta Kostenok , Alexey Zaytsev

Neural code models have been increasingly incorporated into software development processes. However, their susceptibility to backdoor attacks presents a significant security risk. The state-of-the-art understanding focuses on…

Software Engineering · Computer Science 2025-12-23 Junyao Ye , Zhen Li , Xi Tang , Shouhuai Xu , Deqing Zou , Zhongsheng Yuan

Adversarial samples are strategically modified samples, which are crafted with the purpose of fooling a classifier at hand. An attacker introduces specially crafted adversarial samples to a deployed classifier, which are being…

Machine Learning · Computer Science 2017-07-11 Suranjana Samanta , Sameep Mehta

Predicting the trajectories of surrounding objects is a critical task for self-driving vehicles and many other autonomous systems. Recent works demonstrate that adversarial attacks on trajectory prediction, where small crafted perturbations…

Machine Learning · Computer Science 2023-03-22 Ruochen Jiao , Xiangguo Liu , Takami Sato , Qi Alfred Chen , Qi Zhu

Large Language Models (LLMs) are widely deployed in diverse real-world settings, yet remain vulnerable to jailbreaking, where prompt-based attacks bypass safety filters. We present THREAT (Targeted Harmful generation via Reframing and…

Cryptography and Security · Computer Science 2026-05-22 Shahnewaz Karim Sakib , Swati Kar , Anindya Bijoy Das

Semantic communication, enabled by deep joint source-channel coding (DeepJSCC), is widely expected to inherit the vulnerability of deep learning to adversarial perturbations. This paper challenges this prevailing belief and reveals a…

Information Theory · Computer Science 2026-03-26 Runxin Zhang , Yulin Shao , Hongyu An , Zhijin Qin , Kaibin Huang

In this paper, we propose an optimization-based adversarial attack against Neural Machine Translation (NMT) models. First, we propose an optimization problem to generate adversarial examples that are semantically similar to the original…

Computation and Language · Computer Science 2023-06-16 Sahar Sadrizadeh , Clément Barbier , Ljiljana Dolamic , Pascal Frossard

State-of-the-art attacks on NLP models lack a shared definition of a what constitutes a successful attack. We distill ideas from past work into a unified framework: a successful natural language adversarial example is a perturbation that…

Computation and Language · Computer Science 2021-12-23 John X. Morris , Eli Lifland , Jack Lanchantin , Yangfeng Ji , Yanjun Qi

We design, implement, and evaluate adversarial decoding, a new, generic text generation technique that produces readable documents for different adversarial objectives. Prior methods either produce easily detectable gibberish, or cannot…

Computation and Language · Computer Science 2025-03-07 Collin Zhang , Tingwei Zhang , Vitaly Shmatikov

Backdoor attacks significantly compromise the security of large language models by triggering them to output specific and controlled content. Currently, triggers for textual backdoor attacks fall into two categories: fixed-token triggers…

Cryptography and Security · Computer Science 2025-04-01 Jingyi Zheng , Tianyi Hu , Tianshuo Cong , Xinlei He

Recent advances in large language models (LLMs) have demonstrated remarkable potential in the field of natural language processing. Unfortunately, LLMs face significant security and ethical risks. Although techniques such as safety…

Cryptography and Security · Computer Science 2025-05-27 Qingsong Zou , Jingyu Xiao , Qing Li , Zhi Yan , Yuhang Wang , Li Xu , Wenxuan Wang , Kuofeng Gao , Ruoyu Li , Yong Jiang

Recent studies have revealed that NLP predictive models are vulnerable to adversarial attacks. Most existing studies focused on designing attacks to evaluate the robustness of NLP models in the English language alone. Literature has seen an…

Computation and Language · Computer Science 2023-06-09 Hanyu Liu , Chengyuan Cai , Yanjun Qi

The volume of machine-generated content online has grown dramatically due to the widespread use of Large Language Models (LLMs), leading to new challenges for content moderation systems. Conventional content moderation classifiers, which…

Computation and Language · Computer Science 2026-05-26 Shaz Furniturewala , Arkaitz Zubiaga