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Federated learning (FL) enables distributed training with private client data, but its convergence is hindered by system heterogeneity under realistic communication scenarios. Most FL schemes addressing system heterogeneity utilize global…

Machine Learning · Computer Science 2025-09-19 Keumseo Ryum , Jinu Gong , Joonhyuk Kang

We consider Decision-Focused Federated Learning (DFFL), a predict-then-optimize setting in which multiple clients collaboratively train predictive models for downstream linear optimization problems without exchanging raw data. Besides the…

Optimization and Control · Mathematics 2026-05-19 Konstantinos Ziliaskopoulos , Alexander Vinel

Federated learning (FL) is a decentralized privacy-preserving learning technique in which clients learn a joint collaborative model through a central aggregator without sharing their data. In this setting, all clients learn a single common…

Machine Learning · Computer Science 2021-06-01 Siddharth Divi , Habiba Farrukh , Berkay Celik

Federated Learning (FL) enables learning a shared model across many clients without violating the privacy requirements. One of the key attributes in FL is the heterogeneity that exists in both resource and data due to the differences in…

Machine Learning · Computer Science 2020-01-28 Zheng Chai , Ahsan Ali , Syed Zawad , Stacey Truex , Ali Anwar , Nathalie Baracaldo , Yi Zhou , Heiko Ludwig , Feng Yan , Yue Cheng

Standard federated learning approaches suffer when client data distributions have sufficient heterogeneity. Recent methods addressed the client data heterogeneity issue via personalized federated learning (PFL) - a class of FL algorithms…

Machine Learning · Computer Science 2024-04-04 Rishub Tamirisa , Chulin Xie , Wenxuan Bao , Andy Zhou , Ron Arel , Aviv Shamsian

Personalized federated learning (PFL) addresses a critical challenge of collaboratively training customized models for clients with heterogeneous and scarce local data. Conventional federated learning, which relies on a single consensus…

Machine Learning · Computer Science 2025-10-24 Ke Xing , Yanjie Dong , Xiaoyi Fan , Runhao Zeng , Victor C. M. Leung , M. Jamal Deen , Xiping Hu

Federated learning (FL) is a machine learning paradigm where multiple clients collaborate to optimize a single global model using their private data. The global model is maintained by a central server that orchestrates the FL training…

Machine Learning · Computer Science 2024-02-14 Waqwoya Abebe , Pablo Munoz , Ali Jannesari

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 (FL) enables collaborative model training without centralizing client data, making it attractive for privacy-sensitive domains. While existing approaches employ cryptographic techniques such as homomorphic encryption,…

Cryptography and Security · Computer Science 2026-02-09 Sahar Ghoflsaz Ghinani , Elaheh Sadredini

Federated Learning (FL) represents a paradigm shift in the field of machine learning, offering an approach for a decentralized training of models across a multitude of devices while maintaining the privacy of local data. However, the…

Machine Learning · Computer Science 2024-08-21 Tatjana Legler , Vinit Hegiste , Martin Ruskowski

Federated learning (FL) has emerged as a promising paradigm for fine-tuning foundation models using distributed data in a privacy-preserving manner. Under limited computational resources, clients often find it more practical to fine-tune a…

Machine Learning · Computer Science 2024-11-27 Yuchang Sun , Yuexiang Xie , Bolin Ding , Yaliang Li , Jun Zhang

Federated learning (FL) is a type of collaborative machine learning where participating peers/clients process their data locally, sharing only updates to the collaborative model. This enables to build privacy-aware distributed machine…

Machine Learning · Computer Science 2023-03-07 Filippo Galli , Sayan Biswas , Kangsoo Jung , Tommaso Cucinotta , Catuscia Palamidessi

Federated Learning (FL) is a decentralized machine learning approach where local models are trained on distributed clients, allowing privacy-preserving collaboration by sharing model updates instead of raw data. However, the added…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-08-17 Pratik Agrawal , Philipp Wiesner , Odej Kao

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

Data heterogeneity poses a fundamental challenge in federated learning (FL), especially when clients differ not only in distribution but also in the reliability of their predictions across individual examples. While personalized FL (PFL)…

Machine Learning · Computer Science 2025-09-29 Amr Abourayya , Jens Kleesiek , Bharat Rao , Michael Kamp

Federated Learning is widely employed to tackle distributed sensitive data. Existing methods primarily focus on addressing in-federation data heterogeneity. However, we observed that they suffer from significant performance degradation when…

Machine Learning · Computer Science 2024-07-09 Mengmeng Ma , Tang Li , Xi Peng

Federated Learning (FL) trains a machine learning model on distributed clients without exposing individual data. Unlike centralized training that is usually based on carefully-organized data, FL deals with on-device data that are often…

Machine Learning · Computer Science 2022-05-27 Jaemin Shin , Yuanchun Li , Yunxin Liu , Sung-Ju Lee

The federated learning (FL) framework enables multiple clients to collaboratively train machine learning models without sharing their raw data, but it remains vulnerable to privacy attacks. One promising approach is to incorporate…

Machine Learning · Computer Science 2025-04-15 Shokichi Takakura , Seng Pei Liew , Satoshi Hasegawa

Federated learning (FL) is an emerging distributed machine learning paradigm enabling collaborative model training on decentralized devices without exposing their local data. A key challenge in FL is the uneven data distribution across…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-03-08 Md Sirajul Islam , Simin Javaherian , Fei Xu , Xu Yuan , Li Chen , Nian-Feng Tzeng

Federated learning (FL) enables distributed clients to collaboratively train a machine learning model without sharing raw data with each other. However, it suffers the leakage of private information from uploading models. In addition, as…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-12-25 Kang Wei , Jun Li , Chuan Ma , Ming Ding , Feng Shu , Haitao Zhao , Wen Chen , Hongbo Zhu