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Federated learning (FL) remains highly vulnerable to adaptive backdoor attacks that preserve stealth by closely imitating benign update statistics. Existing defenses predominantly rely on anomaly detection in parameter or gradient space,…

Machine Learning · Computer Science 2026-02-13 Chibueze Peace Obioma , Youcheng Sun , Mustafa A. Mustafa

Federated learning (FL) allows multiple clients to collectively train a high-performance global model without sharing their private data. However, the key challenge in federated learning is that the clients have significant statistical…

Machine Learning · Computer Science 2022-03-23 Liang Gao , Huazhu Fu , Li Li , Yingwen Chen , Ming Xu , Cheng-Zhong Xu

Federated learning (FL) is an important technique for learning models from decentralized data in a privacy-preserving way. Existing FL methods usually uniformly sample clients for local model learning in each round. However, different…

Machine Learning · Computer Science 2023-06-27 Tao Qi , Fangzhao Wu , Lingjuan Lyu , Yongfeng Huang , Xing Xie

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

Robustness is becoming another important challenge of federated learning in that the data collection process in each client is naturally accompanied by noisy labels. However, it is far more complex and challenging owing to varying levels of…

Machine Learning · Computer Science 2022-09-20 SangMook Kim , Wonyoung Shin , Soohyuk Jang , Hwanjun Song , Se-Young Yun

Heterogeneity across clients in federated learning (FL) usually hinders the optimization convergence and generalization performance when the aggregation of clients' knowledge occurs in the gradient space. For example, clients may differ in…

Machine Learning · Computer Science 2022-03-08 Yue Tan , Guodong Long , Lu Liu , Tianyi Zhou , Qinghua Lu , Jing Jiang , Chengqi Zhang

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) is a novel distributed learning framework designed for applications with privacy-sensitive data. Without sharing data, FL trains local models on individual devices and constructs the global model on the server by…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-01-25 Shuaijun Chen , Omid Tavallaie , Michael Henri Hambali , Seid Miad Zandavi , Hamed Haddadi , Nicholas Lane , Song Guo , Albert Y. Zomaya

In mobile and IoT systems, Federated Learning (FL) is increasingly important for effectively using data while maintaining user privacy. One key challenge in FL is managing statistical heterogeneity, such as non-i.i.d. data, arising from…

Machine Learning · Computer Science 2024-05-17 Kunda Yan , Sen Cui , Abudukelimu Wuerkaixi , Jingfeng Zhang , Bo Han , Gang Niu , Masashi Sugiyama , Changshui Zhang

Client contribution estimation in Federated Learning is necessary for identifying clients' importance and for providing fair rewards. Current methods often rely on server-side validation data or self-reported client information, which can…

Machine Learning · Computer Science 2026-04-27 Asim Ukaye , Mubarak Abdu-Aguye , Nurbek Tastan , Karthik Nandakumar

Federated Learning (FL) is a promising approach for privacy-preserving network traffic analysis, but its practical deployment is challenged by the non-IID nature of real-world data. While prior work has addressed statistical heterogeneity,…

Networking and Internet Architecture · Computer Science 2025-09-15 Richard Jozsa , Karel Hynek , Adrian Pekar

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) is enabling collaborative model training across institutions without sharing sensitive patient data. This approach is particularly valuable in low- and middle-income countries (LMICs), where access to trained medical…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Nick Lemke , Mirko Konstantin , Henry John Krumb , John Kalkhof , Jonathan Stieber , Anirban Mukhopadhyay

With the emerging application of Federated Learning (FL) in finance, hiring and healthcare, FL models are regulated to be fair, preventing disparities with respect to legally protected attributes such as race or gender. Two concepts of…

Machine Learning · Computer Science 2025-04-02 Yuying Duan , Gelei Xu , Yiyu Shi , Michael Lemmon

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) enables collaborative model training across distributed clients while preserving data privacy. However, optimizing both energy efficiency and model accuracy remains a challenge, given device and data heterogeneity.…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-13 Roopkatha Banerjee , Tejus Chandrashekar , Ananth Eswar , Yogesh Simmhan

The enormous amount of data produced by mobile and IoT devices has motivated the development of federated learning (FL), a framework allowing such devices (or clients) to collaboratively train machine learning models without sharing their…

Machine Learning · Computer Science 2023-01-12 Angelo Rodio , Francescomaria Faticanti , Othmane Marfoq , Giovanni Neglia , Emilio Leonardi

Data heterogeneity is a significant challenge in modern federated learning (FL) as it creates variance in local model updates, causing the aggregated global model to shift away from the true global optimum. Partial client participation in…

Machine Learning · Computer Science 2025-12-24 Mrinmay Sen , Subhrajit Nag

Federated learning (FL) can train a global model from clients' local data set, which can make full use of the computing resources of clients and performs more extensive and efficient machine learning on clients with protecting user…

Networking and Internet Architecture · Computer Science 2022-05-11 Yun Ji , Zhoubin Kou , Xiaoxiong Zhong , Sheng Zhang , Hangfan Li , Fan Yang

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