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Federated learning (FL) presents an effective solution for collaborative model training while maintaining data privacy across decentralized client datasets. However, data quality issues such as noisy labels, missing classes, and imbalanced…

Machine Learning · Computer Science 2025-05-16 Alpaslan Gokcen , Ali Boyaci

Federated learning (FL) has emerged as a powerful paradigm for collaborative model training across distributed clients while preserving data privacy. However, existing FL algorithms predominantly focus on unconstrained optimization problems…

Optimization and Control · Mathematics 2025-08-22 Hongye Wang , Zhaoye Pan , Chang He , Jiaxiang Li , Bo Jiang

Federated learning enables distributed clients to collaborate on training while storing their data locally to protect client privacy. However, due to the heterogeneity of data, models, and devices, the final global model may need to perform…

Machine Learning · Computer Science 2024-06-25 Wolong Xing , Zhenkui Shi , Hongyan Peng , Xiantao Hu , Xianxian Li

Non-Independent and Identically Distributed (non-IID) data in Federated Learning (FL) causes client drift issues, leading to slower convergence and reduced model performance. While existing approaches mitigate this issue in Centralized FL…

Machine Learning · Computer Science 2025-01-07 Chao Feng , Hongjie Guan , Alberto Huertas Celdrán , Jan von der Assen , Gérôme Bovet , Burkhard Stiller

Federated learning is a paradigm that enables local devices to jointly train a server model while keeping the data decentralized and private. In federated learning, since local data are collected by clients, it is hardly guaranteed that the…

Machine Learning · Computer Science 2022-03-01 Seunghan Yang , Hyoungseob Park , Junyoung Byun , Changick Kim

Federated Learning (FL) has gained prominence as a decentralized machine learning paradigm, allowing clients to collaboratively train a global model while preserving data privacy. Despite its potential, FL faces significant challenges in…

Machine Learning · Computer Science 2025-01-07 Simin Javaherian , Bryce Turney , Li Chen , Nian-Feng Tzeng

Federated Learning (FL) aggregates information from multiple clients to train a shared global model without exposing raw data. Accurately estimating each client's contribution is essential not just for fair rewards, but for selecting the…

Machine Learning · Computer Science 2025-10-07 Hossein KhademSohi , Hadi Hemmati , Jiayu Zhou , Steve Drew

Graph federated learning (FL) has emerged as a pivotal paradigm enabling multiple agents to collaboratively train a graph model while preserving local data privacy. Yet, current efforts overlook a key issue: agents are self-interested and…

Machine Learning · Computer Science 2023-12-22 Chenglu Pan , Jiarong Xu , Yue Yu , Ziqi Yang , Qingbiao Wu , Chunping Wang , Lei Chen , Yang Yang

Federated Learning with client-level differential privacy (DP) provides a promising framework for collaboratively training models while rigorously protecting clients' privacy. However, classic approaches like DP-FedAvg struggle when clients…

Cryptography and Security · Computer Science 2026-02-10 Jiahao Xu , Rui Hu , Olivera Kotevska

Federated Learning (FL) enables privacy-preserving multi-source information fusion (MSIF) but is challenged by client drift in highly heterogeneous data settings. Many existing drift-mitigation strategies rely on reference-based…

Machine Learning · Computer Science 2026-02-12 Jungwon Seo , Ferhat Ozgur Catak , Chunming Rong , Kibeom Hong , Minhoe Kim

Federated Machine Learning (FML) creates an ecosystem for multiple parties to collaborate on building models while protecting data privacy for the participants. A measure of the contribution for each party in FML enables fair credits…

Machine Learning · Computer Science 2019-09-19 Guan Wang , Charlie Xiaoqian Dang , Ziye Zhou

Federated learning (FL) is a decentralized machine learning approach where independent learners process data privately. Its goal is to create a robust and accurate model by aggregating and retraining local models over multiple rounds.…

Machine Learning · Computer Science 2023-10-13 Ensiye Kiyamousavi , Boris Kraychev , Ivan Koychev

Federated Learning (FL) is a collaborative machine learning (ML) approach, where multiple clients participate in training an ML model without exposing their private data. Fair and accurate assessment of client contributions facilitates…

Federated Learning (FL) facilitates decentralized collaborative learning without transmitting raw data. However, reliance on fixed global rounds or validation data for hyperparameter tuning hinders practical deployment by incurring high…

Machine Learning · Computer Science 2026-02-27 Youngjoon Lee , Hyukjoon Lee , Seungrok Jung , Andy Luo , Jinu Gong , Yang Cao , Joonhyuk Kang

Federated Learning has emerged as a dominant computational paradigm for distributed machine learning. Its unique data privacy properties allow us to collaboratively train models while offering participating clients certain…

Machine Learning · Computer Science 2022-05-04 Dimitris Stripelis , Marcin Abram , Jose Luis Ambite

In cross-silo federated learning, clients (e.g., organizations) train a shared global model using local data. However, due to privacy concerns, the clients may not contribute enough data points during training. To address this issue, we…

Computer Science and Game Theory · Computer Science 2022-10-17 Chao Huang , Shuqi Ke , Charles Kamhoua , Prasant Mohapatra , Xin Liu

Federated learning (FL) involves several clients that share with a fusion center (FC), the model each client has trained with its own data. Conventional FL, which can be interpreted as an estimation or distortion-based approach, ignores the…

Machine Learning · Computer Science 2024-08-06 Hassan Mohamad , Chao Zhang , Samson Lasaulce , Vineeth S Varma , Mérouane Debbah , Mounir Ghogho

We propose an asymptotic framework to analyze the performance of (personalized) federated learning algorithms. In this new framework, we formulate federated learning as a multi-criterion objective, where the goal is to minimize each…

Machine Learning · Computer Science 2022-02-21 Gary Cheng , Karan Chadha , John Duchi

Training fair machine learning models becomes more and more important. As many powerful models are trained by collaboration among multiple parties, each holding some sensitive data, it is natural to explore the feasibility of training fair…

Machine Learning · Computer Science 2024-11-05 Xin Che , Jingdi Hu , Zirui Zhou , Yong Zhang , Lingyang Chu

Consider two data providers, each maintaining private records of different feature sets about common entities. They aim to learn a linear model jointly in a federated setting, namely, data is local and a shared model is trained from locally…

Machine Learning · Computer Science 2017-11-30 Stephen Hardy , Wilko Henecka , Hamish Ivey-Law , Richard Nock , Giorgio Patrini , Guillaume Smith , Brian Thorne