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This work addresses the problem of optimizing communications between server and clients in federated learning (FL). Current sampling approaches in FL are either biased, or non optimal in terms of server-clients communications and training…

Machine Learning · Computer Science 2021-05-24 Yann Fraboni , Richard Vidal , Laetitia Kameni , Marco Lorenzi

Federated learning (FL) enables distributed clients to collaboratively train a global model using local private data. Nevertheless, recent studies show that conventional FL algorithms still exhibit deficiencies in privacy protection, and…

Cryptography and Security · Computer Science 2026-03-31 Ruiyang Wang , Rong Pan , Zhengan Yao

Federated learning is a collaborative method that aims to preserve data privacy while creating AI models. Current approaches to federated learning tend to rely heavily on secure aggregation protocols to preserve data privacy. However, to…

Cryptography and Security · Computer Science 2022-11-14 John Reuben Gilbert

Federated Learning (FL) trains deep models across edge devices without centralizing raw data, preserving user privacy. However, client heterogeneity slows down convergence and limits global model accuracy. Clustered FL (CFL) mitigates this…

Machine Learning · Computer Science 2026-02-10 Minghao Li , Dmitrii Avdiukhin , Rana Shahout , Nikita Ivkin , Vladimir Braverman , Minlan Yu

Existing approaches in Federated Learning (FL) mainly focus on sending model parameters or gradients from clients to a server. However, these methods are plagued by significant inefficiency, privacy, and security concerns. Thanks to the…

Machine Learning · Computer Science 2024-06-04 Jie Zhang , Xiaohua Qi , Bo Zhao

Federated Learning enables mobile devices to collaboratively learn a shared inference model while keeping all the training data on a user's device, decoupling the ability to do machine learning from the need to store the data in the cloud.…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-12-03 Keith Bonawitz , Fariborz Salehi , Jakub Konečný , Brendan McMahan , Marco Gruteser

Our work aims to minimize interaction in secure computation due to the high cost and challenges associated with communication rounds, particularly in scenarios with many clients. In this work, we revisit the problem of secure aggregation in…

Cryptography and Security · Computer Science 2025-11-18 Harish Karthikeyan , Antigoni Polychroniadou

Federated Learning (FL) allows parties to learn a shared prediction model by delegating the training computation to clients and aggregating all the separately trained models on the server. To prevent private information being inferred from…

Machine Learning · Computer Science 2022-05-13 Kwing Hei Li , Pedro Porto Buarque de Gusmão , Daniel J. Beutel , Nicholas D. Lane

Federated learning enables different parties to collaboratively build a global model under the orchestration of a server while keeping the training data on clients' devices. However, performance is affected when clients have heterogeneous…

Machine Learning · Computer Science 2022-06-20 Fabiola Espinoza Castellon , Aurelien Mayoue , Jacques-Henri Sublemontier , Cedric Gouy-Pailler

Recent attacks on federated learning demonstrate that keeping the training data on clients' devices does not provide sufficient privacy, as the model parameters shared by clients can leak information about their training data. A 'secure…

Cryptography and Security · Computer Science 2020-09-24 Swanand Kadhe , Nived Rajaraman , O. Ozan Koyluoglu , Kannan Ramchandran

Secure aggregation is a popular protocol in privacy-preserving federated learning, which allows model aggregation without revealing the individual models in the clear. On the other hand, conventional secure aggregation protocols incur a…

Machine Learning · Computer Science 2021-12-28 Irem Ergun , Hasin Us Sami , Basak Guler

Federated learning (FL) has emerged as a promising paradigm in machine learning, enabling collaborative model training across decentralized devices without the need for raw data sharing. In FL, a global model is trained iteratively on local…

Machine Learning · Computer Science 2025-04-01 Kanishka Ranaweera , Azadeh Ghari Neiat , Xiao Liu , Bipasha Kashyap , Pubudu N. Pathirana

With the emergence of privacy leaks in federated learning, secure aggregation protocols that mainly adopt either homomorphic encryption or threshold secret sharing have been widely developed for federated learning to protect the privacy of…

Cryptography and Security · Computer Science 2024-06-03 Xue Yang , Zifeng Liu , Xiaohu Tang , Rongxing Lu , Bo Liu

Federated Learning (FL) emerged as a learning method to enable the server to train models over data distributed among various clients. These clients are protective about their data being leaked to the server, any other client, or an…

Machine Learning · Computer Science 2025-01-27 Uday Bhaskar , Varul Srivastava , Avyukta Manjunatha Vummintala , Naresh Manwani , Sujit Gujar

Federated Learning (FL) has recently made significant progress as a new machine learning paradigm for privacy protection. Due to the high communication cost of traditional FL, one-shot federated learning is gaining popularity as a way to…

Machine Learning · Computer Science 2023-05-10 Shangchao Su , Bin Li , Xiangyang Xue

We propose and experimentally evaluate a novel secure aggregation algorithm targeted at cross-organizational federated learning applications with a fixed set of participating learners. Our solution organizes learners in a chain and encrypts…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-08-16 Thomas Sandholm , Sayandev Mukherjee , Bernardo A. Huberman

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 distributed learning setting where the main aim is to train machine learning models without having to share raw data but only what is required for learning. To guarantee training data privacy and high-utility models,…

Machine Learning · Computer Science 2025-03-26 Mikko A. Heikkilä

Strict privacy is of paramount importance in distributed machine learning. Federated learning, with the main idea of communicating only what is needed for learning, has been recently introduced as a general approach for distributed learning…

Cryptography and Security · Computer Science 2020-07-14 Mikko A. Heikkilä , Antti Koskela , Kana Shimizu , Samuel Kaski , Antti Honkela

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