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Large language models play a crucial role in modern natural language processing technologies. However, their extensive use also introduces potential security risks, such as the possibility of black-box attacks. These attacks can embed…

Computation and Language · Computer Science 2025-02-25 Daniil Khomsky , Narek Maloyan , Bulat Nutfullin

Semantic communication systems, which leverage Generative AI (GAI) to transmit semantic meaning rather than raw data, are poised to revolutionize modern communications. However, they are vulnerable to backdoor attacks, a type of poisoning…

Cryptography and Security · Computer Science 2025-02-07 Ziyang Wei , Yili Jiang , Jiaqi Huang , Fangtian Zhong , Sohan Gyawali

Mistranslated numbers have the potential to cause serious effects, such as financial loss or medical misinformation. In this work we develop comprehensive assessments of the robustness of neural machine translation systems to numerical text…

Computation and Language · Computer Science 2021-07-20 Jun Wang , Chang Xu , Francisco Guzman , Ahmed El-Kishky , Benjamin I. P. Rubinstein , Trevor Cohn

Targeted adversarial attacks are widely used to evaluate the robustness of neural machine translation systems. Unfortunately, this paper first identifies a critical issue in the existing settings of NMT targeted adversarial attacks, where…

Computation and Language · Computer Science 2024-07-09 Junjie Wu , Lemao Liu , Wei Bi , Dit-Yan Yeung

Machine learning (ML) will likely play a large role in many processes in the future, also for insurance companies. However, ML models are at risk of being attacked and manipulated. In this work, the robustness of Gradient Boosted Decision…

Machine Learning · Computer Science 2025-09-30 Robin Kühlem , Daniel Otten , Daniel Ludwig , Anselm Hudde , Alexander Rosenbaum , Andreas Mauthe

Large Language Models (LLMs) have shown significant promise in real-world decision-making tasks for embodied artificial intelligence, especially when fine-tuned to leverage their inherent common sense and reasoning abilities while being…

Cryptography and Security · Computer Science 2025-05-01 Ruochen Jiao , Shaoyuan Xie , Justin Yue , Takami Sato , Lixu Wang , Yixuan Wang , Qi Alfred Chen , Qi Zhu

Deep neural networks are vulnerable to adversarial attacks, such as backdoor attacks in which a malicious adversary compromises a model during training such that specific behaviour can be triggered at test time by attaching a specific word…

Cryptography and Security · Computer Science 2022-10-21 You Guo , Jun Wang , Trevor Cohn

Malicious agents in collaborative learning and outsourced data collection threaten the training of clean models. Backdoor attacks, where an attacker poisons a model during training to successfully achieve targeted misclassification, are a…

Machine Learning · Computer Science 2022-01-31 Siddhartha Datta , Nigel Shadbolt

Federated learning (FL) is a machine learning (ML) approach that allows the use of distributed data without compromising personal privacy. However, the heterogeneous distribution of data among clients in FL can make it difficult for the…

Machine Learning · Computer Science 2023-03-07 Thuy Dung Nguyen , Tuan Nguyen , Phi Le Nguyen , Hieu H. Pham , Khoa Doan , Kok-Seng Wong

Although unsupervised neural machine translation (UNMT) has achieved success in many language pairs, the copying problem, i.e., directly copying some parts of the input sentence as the translation, is common among distant language pairs,…

Computation and Language · Computer Science 2023-06-06 Yihong Liu , Alexandra Chronopoulou , Hinrich Schütze , Alexander Fraser

Supervised fine-tuning (SFT) is essential for the development of medical large language models (LLMs), yet prior poisoning studies have mainly focused on the detectable backdoor attacks. We propose a novel poisoning attack targeting the…

Cryptography and Security · Computer Science 2026-03-04 Jingyuan Xie , Wenjie Wang , Ji Wu , Jiandong Gao

The scarcity of parallel data is a major obstacle for training high-quality machine translation systems for low-resource languages. Fortunately, some low-resource languages are linguistically related or similar to high-resource languages;…

Large Language Models (LLMs) are increasingly becoming the preferred foundation platforms for many Natural Language Processing tasks such as Machine Translation, owing to their quality often comparable to or better than task-specific…

Computation and Language · Computer Science 2024-03-18 Zhifan Sun , Antonio Valerio Miceli-Barone

Despite impressive empirical successes of neural machine translation (NMT) on standard benchmarks, limited parallel data impedes the application of NMT models to many language pairs. Data augmentation methods such as back-translation make…

Computation and Language · Computer Science 2019-10-08 Chunting Zhou , Xuezhe Ma , Junjie Hu , Graham Neubig

In recent years, large language models (LLMs) have made significant progress in the field of code generation. However, as more and more users rely on these models for software development, the security risks associated with code generation…

Artificial Intelligence · Computer Science 2024-08-21 Shangxi Wu , Jitao Sang

Large vision-language models (LVLMs) have achieved impressive performance across a wide range of vision-language tasks, while they remain vulnerable to backdoor attacks. Existing backdoor attacks on LVLMs aim to force the victim model to…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Zhifang Zhang , Qiqi Tao , Jiaqi Lv , Na Zhao , Lei Feng , Joey Tianyi Zhou

Neural networks are often trained on proprietary datasets, making them attractive attack targets. We present a novel dataset extraction method leveraging an innovative training time backdoor attack, allowing a malicious federated learning…

Cryptography and Security · Computer Science 2025-12-19 Eden Luzon , Guy Amit , Roy Weiss , Torsten Kraub , Alexandra Dmitrienko , Yisroel Mirsky

Despite the growing variety of languages supported by existing multilingual neural machine translation (MNMT) models, most of the world's languages are still being left behind. We aim to extend large-scale MNMT models to incorporate a new…

Computation and Language · Computer Science 2025-12-02 Wen Lai , Viktor Hangya , Yingli Shen , Alexander Fraser

Transformers have shown great promise as an approach to Neural Machine Translation (NMT) for low-resource languages. However, at the same time, transformer models remain difficult to optimize and require careful tuning of hyper-parameters…

Computation and Language · Computer Science 2020-04-16 Elan van Biljon , Arnu Pretorius , Julia Kreutzer

Federated machine learning which enables resource constrained node devices (e.g., mobile phones and IoT devices) to learn a shared model while keeping the training data local, can provide privacy, security and economic benefits by designing…

Cryptography and Security · Computer Science 2020-04-22 Gan Sun , Yang Cong , Jiahua Dong , Qiang Wang , Ji Liu