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Federated learning (FL) has become a key component in various language modeling applications such as machine translation, next-word prediction, and medical record analysis. These applications are trained on datasets from many FL…

Cryptography and Security · Computer Science 2025-12-11 Md Rafi Ur Rashid , Vishnu Asutosh Dasu , Kang Gu , Najrin Sultana , Shagufta Mehnaz

Backdoor attacks embed malicious triggers into training data, enabling attackers to manipulate neural network behavior during inference while maintaining high accuracy on benign inputs. However, existing backdoor attacks face limitations…

Cryptography and Security · Computer Science 2025-05-27 Zhou Feng , Jiahao Chen , Chunyi Zhou , Yuwen Pu , Qingming Li , Shouling Ji

Federated learning (FL) is a collaborative learning paradigm allowing multiple clients to jointly train a model without sharing their training data. However, FL is susceptible to poisoning attacks, in which the adversary injects manipulated…

Cryptography and Security · Computer Science 2024-01-17 Hossein Fereidooni , Alessandro Pegoraro , Phillip Rieger , Alexandra Dmitrienko , Ahmad-Reza Sadeghi

Large Language Models (LLMs) are known to be vulnerable to backdoor attacks, where triggers embedded in poisoned samples can maliciously alter LLMs' behaviors. In this paper, we move beyond attacking LLMs and instead examine backdoor…

Cryptography and Security · Computer Science 2025-02-18 Huaizhi Ge , Yiming Li , Qifan Wang , Yongfeng Zhang , Ruixiang Tang

Reinforcement learning (RL) is an actively growing field that is seeing increased usage in real-world, safety-critical applications -- making it paramount to ensure the robustness of RL algorithms against adversarial attacks. In this work…

Machine Learning · Computer Science 2024-10-22 Ethan Rathbun , Christopher Amato , Alina Oprea

Federated Learning (FL) represents a promising approach to typical privacy concerns associated with centralized Machine Learning (ML) deployments. Despite its well-known advantages, FL is vulnerable to security attacks such as Byzantine…

Machine Learning · Computer Science 2024-02-16 Enrique Mármol Campos , Aurora González Vidal , José Luis Hernández Ramos , Antonio Skarmeta

Despite being widely applied due to their exceptional capabilities, Large Language Models (LLMs) have been proven to be vulnerable to backdoor attacks. These attacks introduce targeted vulnerabilities into LLMs by poisoning training samples…

Cryptography and Security · Computer Science 2025-07-10 Shuai Zhao , Leilei Gan , Zhongliang Guo , Xiaobao Wu , Yanhao Jia , Luwei Xiao , Cong-Duy Nguyen , Luu Anh Tuan

Federated Learning (FL) has recently emerged as a revolutionary approach to collaborative training Machine Learning models. In particular, it enables decentralized model training while preserving data privacy, but its distributed nature…

Cryptography and Security · Computer Science 2025-12-30 Sameera K. M. , Serena Nicolazzo , Antonino Nocera , Vinod P. , Rafidha Rehiman K. A

The use of third-party datasets and pre-trained machine learning models poses a threat to NLP systems due to possibility of hidden backdoor attacks. Existing attacks involve poisoning the data samples such as insertion of tokens or sentence…

Computation and Language · Computer Science 2024-04-09 Irina Alekseevskaia , Konstantin Arkhipenko

Federated learning (FL) has been widely adopted as a decentralized training paradigm that enables multiple clients to collaboratively learn a shared model without exposing their local data. As concerns over data privacy and regulatory…

Cryptography and Security · Computer Science 2025-08-22 Bingguang Lu , Hongsheng Hu , Yuantian Miao , Shaleeza Sohail , Chaoxiang He , Shuo Wang , Xiao Chen

In the text processing context, most ML models are built on word embeddings. These embeddings are themselves trained on some datasets, potentially containing sensitive data. In some cases this training is done independently, in other cases,…

Computation and Language · Computer Science 2021-06-23 Saeed Mahloujifar , Huseyin A. Inan , Melissa Chase , Esha Ghosh , Marcello Hasegawa

Deep neural networks have been demonstrated to be vulnerable to backdoor attacks. Specifically, by injecting a small number of maliciously constructed inputs into the training set, an adversary is able to plant a backdoor into the trained…

Machine Learning · Statistics 2019-12-10 Alexander Turner , Dimitris Tsipras , Aleksander Madry

Federated learning (FL) enables a set of entities to collaboratively train a machine learning model without sharing their sensitive data, thus, mitigating some privacy concerns. However, an increasing number of works in the literature…

Cryptography and Security · Computer Science 2022-01-04 Aidmar Wainakh , Ephraim Zimmer , Sandeep Subedi , Jens Keim , Tim Grube , Shankar Karuppayah , Alejandro Sanchez Guinea , Max Mühlhäuser

The pre-training of large language models (LLMs) relies on massive text datasets sourced from diverse and difficult-to-curate origins. Although membership inference attacks and hidden canaries have been explored to trace data usage, such…

Cryptography and Security · Computer Science 2025-06-19 Wassim Bouaziz , Mathurin Videau , Nicolas Usunier , El-Mahdi El-Mhamdi

Federated Learning (FL) enables collaborative model training while preserving data privacy, but it is highly vulnerable to backdoor attacks. Most existing defense methods in FL have limited effectiveness due to their neglect of the model's…

Cryptography and Security · Computer Science 2025-08-05 Xinhai Yan , Libing Wu , Zhuangzhuang Zhang , Bingyi Liu , Lijuan Huo , Jing Wang

Federated learning (FL) combined with local differential privacy (LDP) enables privacy-preserving model training across decentralized data sources. However, the decentralized data-management paradigm leaves LDPFL vulnerable to participants…

Cryptography and Security · Computer Science 2025-09-08 Zijian Wang , Wei Tong , Tingxuan Han , Haoyu Chen , Tianling Zhang , Yunlong Mao , Sheng Zhong

Federated learning (FL) enables multiple clients to train a model without compromising sensitive data. The decentralized nature of FL makes it susceptible to adversarial attacks, especially backdoor insertion during training. Recently, the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Thuy Dung Nguyen , Anh Duy Nguyen , Kok-Seng Wong , Huy Hieu Pham , Thanh Hung Nguyen , Phi Le Nguyen , Truong Thao Nguyen

Federated learning enables learning from decentralized data sources without compromising privacy, which makes it a crucial technique. However, it is vulnerable to model poisoning attacks, where malicious clients interfere with the training…

Cryptography and Security · Computer Science 2023-07-19 Sungwon Park , Sungwon Han , Fangzhao Wu , Sundong Kim , Bin Zhu , Xing Xie , Meeyoung Cha

This paper demonstrates a fatal vulnerability in natural language inference (NLI) and text classification systems. More concretely, we present a 'backdoor poisoning' attack on NLP models. Our poisoning attack utilizes conditional…

Computation and Language · Computer Science 2020-10-07 Alvin Chan , Yi Tay , Yew-Soon Ong , Aston Zhang

With the boom in the natural language processing (NLP) field these years, backdoor attacks pose immense threats against deep neural network models. However, previous works hardly consider the effect of the poisoning rate. In this paper, our…

Cryptography and Security · Computer Science 2023-11-27 Yueqi Zeng , Ziqiang Li , Pengfei Xia , Lei Liu , Bin Li