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Federated learning is a promising distributed learning paradigm that enables collaborative model training without exposing local client data, thereby protecting data privacy. However, it also brings new threats and challenges. The…

Cryptography and Security · Computer Science 2026-04-14 Nina Cai , Jinguang Han , Weizhi Meng

Federated learning is used to train a shared model in a decentralized way without clients sharing private data with each other. Federated learning systems are susceptible to poisoning attacks when malicious clients send false updates to the…

Machine Learning · Computer Science 2023-08-21 Sungwon Han , Sungwon Park , Fangzhao Wu , Sundong Kim , Bin Zhu , Xing Xie , Meeyoung Cha

The idea of federated learning is to train deep neural network models collaboratively and share them with multiple participants without exposing their private training data to each other. This is highly attractive in the medical domain due…

Image and Video Processing · Electrical Eng. & Systems 2022-05-02 Mads Emil Dahlgaard , Morten Wehlast Jørgensen , Niels Asp Fuglsang , Hiba Nassar

Federated Learning (FL) enables distributed participants (e.g., mobile devices) to train a global model without sharing data directly to a central server. Recent studies have revealed that FL is vulnerable to gradient inversion attack…

Cryptography and Security · Computer Science 2023-09-15 Jiaheng Wei , Yanjun Zhang , Leo Yu Zhang , Chao Chen , Shirui Pan , Kok-Leong Ong , Jun Zhang , Yang Xiang

Federated learning (FL) has garnered significant attention as a prominent privacy-preserving Machine Learning (ML) paradigm. Decentralized FL (DFL) eschews traditional FL's centralized server architecture, enhancing the system's robustness…

Machine Learning · Computer Science 2025-02-10 Chao Feng , Yunlong Li , Yuanzhe Gao , Alberto Huertas Celdrán , Jan von der Assen , Gérôme Bovet , Burkhard Stiller

Federated learning (FL) is inherently susceptible to privacy breaches and poisoning attacks. To tackle these challenges, researchers have separately devised secure aggregation mechanisms to protect data privacy and robust aggregation…

Cryptography and Security · Computer Science 2025-02-11 Runhua Xu , Shiqi Gao , Chao Li , James Joshi , Jianxin Li

Current defense mechanisms against model poisoning attacks in federated learning (FL) systems have proven effective up to a certain threshold of malicious clients. In this work, we introduce FLANDERS, a novel pre-aggregation filter for FL…

Machine Learning · Computer Science 2026-03-03 Edoardo Gabrielli , Dimitri Belli , Zoe Matrullo , Vittorio Miori , Gabriele Tolomei

Model poisoning attacks greatly jeopardize the application of federated learning (FL). The effectiveness of existing defenses is susceptible to the latest model poisoning attacks, leading to a decrease in prediction accuracy. Besides, these…

Cryptography and Security · Computer Science 2023-10-10 Haonan Yan , Wenjing Zhang , Qian Chen , Xiaoguang Li , Wenhai Sun , Hui Li , Xiaodong Lin

Aiming at privacy preservation, Federated Learning (FL) is an emerging machine learning approach enabling model training on decentralized devices or data sources. The learning mechanism of FL relies on aggregating parameter updates from…

Machine Learning · Computer Science 2024-05-21 Jiayan Chen , Zhirong Qian , Tianhui Meng , Xitong Gao , Tian Wang , Weijia Jia

Without direct access to the client's data, federated learning (FL) is well-known for its unique strength in data privacy protection among existing distributed machine learning techniques. However, its distributive and iterative nature…

Machine Learning · Computer Science 2026-04-14 Hanxi Guo , Hao Wang , Tao Song , Tianhang Zheng , Yang Hua , Haibing Guan , Xiangyu Zhang

The development of deep learning techniques is a leading field applied to cases in which medical data is used, particularly in cases of image diagnosis. This type of data has privacy and legal restrictions that in many cases prevent it from…

Machine Learning · Computer Science 2025-01-28 Judith Sáinz-Pardo Díaz , Álvaro López García

Recent work has shown that gradient updates in federated learning (FL) can unintentionally reveal sensitive information about a client's local data. This risk becomes significantly greater when a malicious server manipulates the global…

Machine Learning · Computer Science 2025-06-26 Fei Wang , Baochun Li

Federated learning is vulnerable to poisoning attacks by malicious adversaries. Existing methods often involve high costs to achieve effective attacks. To address this challenge, we propose a sybil-based virtual data poisoning attack, where…

Cryptography and Security · Computer Science 2025-05-16 Changxun Zhu , Qilong Wu , Lingjuan Lyu , Shibei Xue

Federated learning (FL) is vulnerable to model poisoning attacks due to its distributed nature. The current defenses start from all user gradients (model updates) in each communication round and solve for the optimal aggregation gradients…

Machine Learning · Computer Science 2024-11-19 Jinbo Wang , Ruijin Wang , Fengli Zhang

Federated learning systems are vulnerable to attacks from malicious clients. As the central server in the system cannot govern the behaviors of the clients, a rogue client may initiate an attack by sending malicious model updates to the…

Machine Learning · Computer Science 2020-02-04 Suyi Li , Yong Cheng , Wei Wang , Yang Liu , Tianjian Chen

The increasing access to data poses both opportunities and risks in deep learning, as one can manipulate the behaviors of deep learning models with malicious training samples. Such attacks are known as data poisoning. Recent advances in…

Machine Learning · Computer Science 2023-06-29 Wenxiao Wang , Soheil Feizi

Federated learning (FL) is an emerging paradigm for distributed training of large-scale deep neural networks in which participants' data remains on their own devices with only model updates being shared with a central server. However, the…

Machine Learning · Computer Science 2020-08-13 Vale Tolpegin , Stacey Truex , Mehmet Emre Gursoy , Ling Liu

Motivated by the ever-increasing concerns on personal data privacy and the rapidly growing data volume at local clients, federated learning (FL) has emerged as a new machine learning setting. An FL system is comprised of a central parameter…

Cryptography and Security · Computer Science 2022-08-04 Xiang Ma , Haijian Sun , Rose Qingyang Hu , Yi Qian

Deep Learning-based image synthesis techniques have been applied in healthcare research for generating medical images to support open research. Training generative adversarial neural networks (GAN) usually requires large amounts of training…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Ruinan Jin , Xiaoxiao Li

Federated Learning (FL) can be vulnerable to attacks, such as model poisoning, where adversaries send malicious local weights to compromise the global model. Federated Unlearning (FU) is emerging as a solution to address such…

Machine Learning · Computer Science 2025-08-20 Nicolò Romandini , Cristian Borcea , Rebecca Montanari , Luca Foschini