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Federated learning (FL) has emerged as a promising collaborative and secure paradigm for training a model from decentralized data without compromising privacy. Group fairness and client fairness are two dimensions of fairness that are…

Machine Learning · Computer Science 2023-12-12 Cong Su , Guoxian Yu , Jun Wang , Hui Li , Qingzhong Li , Han Yu

Classical federated learning (FL) enables training machine learning models without sharing data for privacy preservation, but heterogeneous data characteristic degrades the performance of the localized model. Personalized FL (PFL) addresses…

Machine Learning · Computer Science 2023-11-13 Mingjia Shi , Yuhao Zhou , Kai Wang , Huaizheng Zhang , Shudong Huang , Qing Ye , Jiangcheng Lv

Decentralized federated learning (DFL) enables clients (e.g., hospitals and banks) to jointly train machine learning models without a central orchestration server. In each global training round, each client trains a local model on its own…

Machine Learning · Computer Science 2025-10-15 Yuqi Jia , Minghong Fang , Neil Zhenqiang Gong

Supervised federated learning (FL) enables multiple clients to share the trained model without sharing their labeled data. However, potential clients might even be reluctant to label their own data, which could limit the applicability of FL…

Machine Learning · Computer Science 2022-05-12 Nan Lu , Zhao Wang , Xiaoxiao Li , Gang Niu , Qi Dou , Masashi Sugiyama

Federated Learning (FL) aims to learn a single global model that enables the central server to help the model training in local clients without accessing their local data. The key challenge of FL is the heterogeneity of local data in…

Machine Learning · Computer Science 2023-04-17 Sicong Liang , Junchao Tian , Shujun Yang , Yu Zhang

In the context of personalized federated learning (FL), the critical challenge is to balance local model improvement and global model tuning when the personal and global objectives may not be exactly aligned. Inspired by Bayesian…

Machine Learning · Computer Science 2022-04-19 Huili Chen , Jie Ding , Eric Tramel , Shuang Wu , Anit Kumar Sahu , Salman Avestimehr , Tao Zhang

Federated learning allows multiple clients to collaboratively train a model without exchanging their data, thus preserving data privacy. Unfortunately, it suffers significant performance degradation due to heterogeneous data at clients.…

Machine Learning · Computer Science 2023-10-19 Tailin Zhou , Jun Zhang , Danny H. K. Tsang

Federated learning is a paradigm of joint learning in which clients collaborate by sharing model parameters instead of data. However, in the non-iid setting, the global model experiences client drift, which can seriously affect the final…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Jiaze Li , Haoran Xu , Wanyi Wu , Changwei Wang , Shuaiguang Li , Jianzhong Ju , Zhenbo Luo , Jian Luan , Youyang Qu , Longxiang Gao , Xudong Yang , Lumin Xing

The federated learning (FL) paradigm emerges to preserve data privacy during model training by only exposing clients' model parameters rather than original data. One of the biggest challenges in FL lies in the non-IID (not identical and…

Machine Learning · Computer Science 2023-05-26 Jiahao Tan , Yipeng Zhou , Gang Liu , Jessie Hui Wang , Shui Yu

Federated learning (FL) is an appealing concept to perform distributed training of Neural Networks (NN) while keeping data private. With the industrialization of the FL framework, we identify several problems hampering its successful…

Machine Learning · Computer Science 2020-11-13 Lixuan Yang , Cedric Beliard , Dario Rossi

Federated Learning (FL) enables data owners to train a shared global model without sharing their private data. Unfortunately, FL is susceptible to an intrinsic fairness issue: due to heterogeneity in clients' data distributions, the final…

Machine Learning · Computer Science 2022-08-18 Hamid Mozaffari , Amir Houmansadr

With the wealth of information produced by social networks, smartphones, medical or financial applications, speculations have been raised about the sensitivity of such data in terms of users' personal privacy and data security. To address…

Machine Learning · Computer Science 2019-08-21 Vito Walter Anelli , Yashar Deldjoo , Tommaso Di Noia , Antonio Ferrara

Traditional Federated Learning (FL) faces significant challenges in terms of efficiency and accuracy, particularly in heterogeneous environments where clients employ diverse model architectures and have varying computational resources. Such…

Machine Learning · Computer Science 2025-05-13 Jiacheng Wang , Hongtao Lv , Lei Liu

Federated Learning (FL) enables collaborative model training without data sharing, yet participants face a fundamental challenge, e.g., simultaneously ensuring fairness across demographic groups while protecting sensitive client data. We…

Machine Learning · Computer Science 2026-04-30 Kangkang Sun , Jun Wu , Minyi Guo , Jianhua Li , Jianwei Huang

Federated learning allows clients to collaboratively learn statistical models while keeping their data local. Federated learning was originally used to train a unique global model to be served to all clients, but this approach might be…

Machine Learning · Computer Science 2022-06-20 Othmane Marfoq , Giovanni Neglia , Laetitia Kameni , Richard Vidal

The popularity of federated learning (FL) is on the rise, along with growing concerns about data privacy in artificial intelligence applications. FL facilitates collaborative multi-party model learning while simultaneously ensuring the…

Machine Learning · Computer Science 2024-02-19 Muhammad Firdaus , Kyung-Hyune Rhee

Federated Learning (FL) allows training machine learning models in privacy-constrained scenarios by enabling the cooperation of edge devices without requiring local data sharing. This approach raises several challenges due to the different…

Machine Learning · Computer Science 2022-12-02 Riccardo Zaccone , Andrea Rizzardi , Debora Caldarola , Marco Ciccone , Barbara Caputo

Federated Learning (FL) has emerged as a prominent privacy-preserving technique for enabling use cases like confidential clinical machine learning. FL operates by aggregating models trained by remote devices which owns the data. Thus, FL…

Machine Learning · Computer Science 2024-04-23 Michael Duchesne , Kaiwen Zhang , Chamseddine Talhi

Federated Learning (FL) is a machine learning paradigm that safeguards privacy by retaining client data on edge devices. However, optimizing FL in practice can be challenging due to the diverse and heterogeneous nature of the learning…

Machine Learning · Computer Science 2024-06-11 Yongxin Guo , Xiaoying Tang , Tao Lin

Federated learning (FL) is a well established method for performing machine learning tasks over massively distributed data. However in settings where data is distributed in a non-iid (not independent and identically distributed) fashion --…

Machine Learning · Computer Science 2020-05-07 Christopher Briggs , Zhong Fan , Peter Andras