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Federated learning (FL) has gained attention as a distributed learning paradigm for its data privacy benefits and accelerated convergence through parallel computation. Traditional FL relies on a server-client (SC) architecture, where a…

Cryptography and Security · Computer Science 2025-02-14 Minghong Fang , Zhuqing Liu , Xuecen Zhao , Jia Liu

Federated learning (FL) enables collaborative model training while preserving data privacy. However, it remains vulnerable to malicious clients who compromise model integrity through Byzantine attacks, data poisoning, or adaptive…

Machine Learning · Computer Science 2026-05-13 Abolfazl Younesi , Leon Kiss , Zahra Najafabadi Samani , Juan Aznar Poveda , Thomas Fahringer

We propose \texttt{FedGLOMO}, a novel federated learning (FL) algorithm with an iteration complexity of $\mathcal{O}(\epsilon^{-1.5})$ to converge to an $\epsilon$-stationary point (i.e., $\mathbb{E}[\|\nabla f(\bm{x})\|^2] \leq \epsilon$)…

Machine Learning · Statistics 2021-10-26 Rudrajit Das , Anish Acharya , Abolfazl Hashemi , Sujay Sanghavi , Inderjit S. Dhillon , Ufuk Topcu

Multi-server Federated learning (FL) has been considered as a promising solution to address the limited communication resource problem of single-server FL. We consider a typical multi-server FL architecture, where the coverage areas of…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-08-18 Zhe Qu , Xingyu Li , Jie Xu , Bo Tang , Zhuo Lu , Yao Liu

Federated learning (FL) is a privacy-preserving machine learning technique that facilitates collaboration among participants across demographics. FL enables model sharing, while restricting the movement of data. Since FL provides…

Machine Learning · Computer Science 2025-10-15 Harsh Kasyap , Minghong Fang , Zhuqing Liu , Carsten Maple , Somanath Tripathy

Federated Learning (FL) enables collaborative machine learning across decentralized data sources without sharing raw data. It offers a promising approach to privacy-preserving AI. However, FL remains vulnerable to adversarial threats from…

Machine Learning · Computer Science 2025-06-05 Kun Yang , Neena Imam

Federated learning (FL) aims to train models collaboratively across clients without sharing data for privacy-preserving. However, one major challenge is the data heterogeneity issue, which refers to the biased labeling preferences at…

Computer Vision and Pattern Recognition · Computer Science 2025-06-27 Huan Wang , Haoran Li , Huaming Chen , Jun Yan , Jiahua Shi , Jun Shen

Federated Learning (FL) is a way for machines to learn from data that is kept locally, in order to protect the privacy of clients. This is typically done using local SGD, which helps to improve communication efficiency. However, such a…

Machine Learning · Computer Science 2023-06-01 Yongxin Guo , Xiaoying Tang , Tao Lin

In decentralized federated learning (DFL), the presence of abnormal clients, often caused by noisy or poisoned data, can significantly disrupt the learning process and degrade the overall robustness of the model. Previous methods on this…

Machine Learning · Computer Science 2025-12-04 Shuyuan Wu , Feifei Wang , Yuan Gao , Rui Wang , Hansheng Wang

Federated Learning enables collaborative training of machine learning models on decentralized data. This scheme, however, is vulnerable to adversarial attacks, when some of the clients submit corrupted model updates. In real-world…

Machine Learning · Computer Science 2025-05-06 Aleksandr Karakulev , Usama Zafar , Salman Toor , Prashant Singh

Federated Learning (FL) enables decentralised model training across distributed clients without requiring data centralisation. However, the generalisation performance of the global model is usually degraded by data heterogeneity across…

Machine Learning · Computer Science 2026-05-11 Ozgu Goksu , Nicolas Pugeault

Federated learning (FL), as an emerging artificial intelligence (AI) approach, enables decentralized model training across multiple devices without exposing their local training data. FL has been increasingly gaining popularity in both…

Machine Learning · Computer Science 2023-10-23 Victoria Huang , Shaleeza Sohail , Michael Mayo , Tania Lorido Botran , Mark Rodrigues , Chris Anderson , Melanie Ooi

Federated learning (FL) enables a set of distributed clients to jointly train machine learning models while preserving their local data privacy, making it attractive for applications in healthcare, finance, mobility, and smart-city systems.…

Machine Learning · Computer Science 2026-03-26 Eman M. AbouNassar , Amr Elshall , Sameh Abdulah

We study local stochastic gradient descent methods for solving federated optimization over a network of agents communicating indirectly through a centralized coordinator. We are interested in the Byzantine setting where there is a subset of…

Optimization and Control · Mathematics 2024-09-06 Amit Dutta , Thinh T. Doan

Federated learning (FL) has enabled multiple data owners (a.k.a. FL clients) to train machine learning models collaboratively without revealing private data. Since the FL server can only engage a limited number of clients in each training…

Machine Learning · Computer Science 2023-07-21 Yuxin Shi , Zelei Liu , Zhuan Shi , Han Yu

Federated learning (FL) allows edge devices to collaboratively train models without sharing local data. As FL gains popularity, clients may need to train multiple unrelated FL models, but communication constraints limit their ability to…

Machine Learning · Computer Science 2025-04-23 Haoran Zhang , Zejun Gong , Zekai Li , Marie Siew , Carlee Joe-Wong , Rachid El-Azouzi

Over the past few years, Federated Learning (FL) has become a popular distributed machine learning paradigm. FL involves a group of clients with decentralized data who collaborate to learn a common model under the coordination of a…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-05-21 Jieming Bian , Lei Wang , Kun Yang , Cong Shen , Jie Xu

Federated Learning (FL) is a distributed machine learning approach where multiple clients work together to solve a machine learning task. One of the key challenges in FL is the issue of partial participation, which occurs when a large…

Machine Learning · Computer Science 2023-03-01 Grigory Malinovsky , Samuel Horváth , Konstantin Burlachenko , Peter Richtárik

Federated Learning (FL) has emerged as a means of distributed learning using local data stored at clients with a coordinating server. Recent studies showed that FL can suffer from poor performance and slower convergence when training data…

Machine Learning · Computer Science 2023-08-17 Van Sy Mai , Richard J. La , Tao Zhang

Federated Learning (FL) is a distributed machine learning paradigm facilitating participants to collaboratively train a model without revealing their local data. However, when FL is deployed into the wild, some intelligent clients can…

Machine Learning · Computer Science 2025-10-03 Andrea Augello , Ashish Gupta , Giuseppe Lo Re , Sajal K. Das