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Federated learning (FL) is a promising privacy-preserving distributed machine learning methodology that allows multiple clients (i.e., workers) to collaboratively train statistical models without disclosing private training data. Due to the…

Machine Learning · Computer Science 2021-04-19 Bo Zhao , Peng Sun , Liming Fang , Tao Wang , Keyu Jiang

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

Federated learning (FL) enables clients to collaborate with a server to train a machine learning model. To ensure privacy, the server performs secure aggregation of updates from the clients. Unfortunately, this prevents verification of the…

Cryptography and Security · Computer Science 2022-09-13 Amrita Roy Chowdhury , Chuan Guo , Somesh Jha , Laurens van der Maaten

Prior efforts in enhancing federated learning (FL) security fall into two categories. At one end of the spectrum, some work uses secure aggregation techniques to hide the individual client's updates and only reveal the aggregated global…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-06-01 Lun Wang , Qi Pang , Shuai Wang , Dawn Song

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

Federated learning (FL) is a distributed learning paradigm that preserves users' data privacy while leveraging the entire dataset of all participants. In FL, multiple models are trained independently on the clients and aggregated centrally…

Machine Learning · Computer Science 2023-01-11 Amin Eslami Abyane , Derui Zhu , Roberto Souza , Lei Ma , Hadi Hemmati

Non-IID data distribution across clients and poisoning attacks are two main challenges in real-world federated learning (FL) systems. While both of them have attracted great research interest with specific strategies developed, no known…

Machine Learning · Computer Science 2022-11-22 Yueqi Xie , Weizhong Zhang , Renjie Pi , Fangzhao Wu , Qifeng Chen , Xing Xie , Sunghun Kim

Federated learning is a promising direction to tackle the privacy issues related to sharing patients' sensitive data. Often, federated systems in the medical image analysis domain assume that the participating local clients are…

Machine Learning · Computer Science 2023-08-16 Indu Joshi , Priyank Upadhya , Gaurav Kumar Nayak , Peter Schüffler , Nassir Navab

Federated Learning (FL) aims to train a collaborative model while preserving data privacy. However, the distributed nature of this approach still raises privacy and security issues, such as the exposure of sensitive data due to inference…

Machine Learning · Computer Science 2026-02-09 Adda Akram Bendoukha , Aymen Boudguiga , Nesrine Kaaniche , Renaud Sirdey , Didem Demirag , Sébastien Gambs

Federated learning (FL) is a trending training paradigm to utilize decentralized training data. FL allows clients to update model parameters locally for several epochs, then share them to a global model for aggregation. This training…

Machine Learning · Computer Science 2022-08-09 Xiaoxiao Li , Zhao Song , Jiaming Yang

Federated Learning (FL) is one of the hot research topics, and it utilizes Machine Learning (ML) in a distributed manner without directly accessing private data on clients. However, FL faces many challenges, including the difficulty to…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-05-02 Shadha Tabatabai , Ihab Mohammed , Basheer Qolomany , Abdullatif Albasser , Kashif Ahmad , Mohamed Abdallah , Ala Al-Fuqaha

Federated reinforcement learning (FRL) allows agents to jointly learn a global decision-making policy under the guidance of a central server. While FRL has advantages, its decentralized design makes it prone to poisoning attacks. To…

Cryptography and Security · Computer Science 2025-02-13 Minghong Fang , Xilong Wang , Neil Zhenqiang Gong

Robustness to malicious attacks is of paramount importance for distributed learning. Existing works usually consider the classical Byzantine attacks model, which assumes that some workers can send arbitrarily malicious messages to the…

Machine Learning · Computer Science 2024-12-30 Jie Peng , Weiyu Li , Stefan Vlaski , Qing Ling

Federated learning is a prominent framework that enables clients (e.g., mobile devices or organizations) to train a collaboratively global model under a central server's orchestration while keeping local training datasets' privacy. However,…

Machine Learning · Computer Science 2021-07-20 Farnaz Tahmasebian , Jian Lou , Li Xiong

Federated learning (FL) enables collaborative model training while preserving data privacy, but its decentralized nature exposes it to client-side data poisoning attacks (DPAs) and model poisoning attacks (MPAs) that degrade global model…

Cryptography and Security · Computer Science 2025-02-07 Heyi Zhang , Yule Liu , Xinlei He , Jun Wu , Tianshuo Cong , Xinyi Huang

Federated learning (FL) enables learning a global machine learning model from local data distributed among a set of participating workers. This makes it possible i) to train more accurate models due to learning from rich joint training…

Machine Learning · Computer Science 2025-11-25 Najeeb Jebreel , Josep Domingo-Ferrer

Federated Learning (FL) is an emerging distributed machine learning paradigm enabling multiple clients to train a global model collaboratively without sharing their raw data. While FL enhances data privacy by design, it remains vulnerable…

In this paper, we propose a robust aggregation method for federated learning (FL) that can effectively tackle malicious Byzantine attacks. At each user, model parameter is firstly updated by multiple steps, which is adjustable over…

Machine Learning · Computer Science 2023-08-22 Shiyuan Zuo , Rongfei Fan , Han Hu , Ning Zhang , Shimin Gong

Federated Learning (FL) is a machine learning paradigm to conduct collaborative learning among clients on a joint model. The primary goal is to share clients' local training parameters with an integrating server while preserving their…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Mahdi Ghafourian , Julian Fierrez , Ruben Vera-Rodriguez , Ruben Tolosana , Aythami Morales

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