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Federated learning (FL) provides a variety of privacy advantages by allowing clients to collaboratively train a model without sharing their private data. However, recent studies have shown that private information can still be leaked…

Machine Learning · Computer Science 2023-04-12 Yue Cui , Syed Irfan Ali Meerza , Zhuohang Li , Luyang Liu , Jiaxin Zhang , Jian Liu

This paper focuses on addressing the practical yet challenging problem of model heterogeneity in federated learning, where clients possess models with different network structures. To track this problem, we propose a novel framework called…

Machine Learning · Computer Science 2023-10-30 Jiaqi Wang , Xingyi Yang , Suhan Cui , Liwei Che , Lingjuan Lyu , Dongkuan Xu , Fenglong Ma

Federated Inference (FI) studies how independently trained and privately owned models can collaborate at inference time without sharing data or model parameters. While recent work has explored secure and distributed inference from disparate…

Artificial Intelligence · Computer Science 2026-03-05 Jungwon Seo , Ferhat Ozgur Catak , Chunming Rong , Jaeyeon Jang

The interest in federated learning has surged in recent research due to its unique ability to train a global model using privacy-secured information held locally on each client. This paper pays particular attention to the issue of…

Machine Learning · Computer Science 2024-04-16 Kai Yi , Nidham Gazagnadou , Peter Richtárik , Lingjuan Lyu

The drive for personalization in recommender systems creates a tension between user privacy and the risk of "filter bubbles". Although federated learning offers a promising paradigm for privacy-preserving recommendations, its impact on…

Information Retrieval · Computer Science 2025-10-08 Sven Lankester , Gustavo de Carvalho Bertoli , Matias Vizcaino , Emmanuelle Beauxis Aussalet , Manel Slokom

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

Matrix Factorization has been very successful in practical recommendation applications and e-commerce. Due to data shortage and stringent regulations, it can be hard to collect sufficient data to build performant recommender systems for a…

Cryptography and Security · Computer Science 2020-07-06 Dashan Gao , Ben Tan , Ce Ju , Vincent W. Zheng , Qiang Yang

Traditionally, clustered federated learning groups clients with the same data distribution into a cluster, so that every client is uniquely associated with one data distribution and helps train a model for this distribution. We relax this…

Machine Learning · Computer Science 2022-03-24 Yichen Ruan , Carlee Joe-Wong

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) is a distributed machine learning strategy that enables participants to collaborate and train a shared model without sharing their individual datasets. Privacy and fairness are crucial considerations in FL. While FL…

Machine Learning · Computer Science 2023-05-24 Ayush K. Varshney , Sonakshi Garg , Arka Ghosh , Sargam Gupta

Federated learning (FL) is a privacy-promoting framework that enables potentially large number of clients to collaboratively train machine learning models. In a FL system, a server coordinates the collaboration by collecting and aggregating…

Machine Learning · Computer Science 2023-04-21 Huancheng Chen , Haris Vikalo

Federated learning is an emerging distributed machine learning framework aiming at protecting data privacy. Data heterogeneity is one of the core challenges in federated learning, which could severely degrade the convergence rate and…

Machine Learning · Statistics 2025-11-27 Feifei Wang , Huiyun Tang , Yang Li

Deep learning has been successful for many computer vision tasks due to the availability of shared and centralised large-scale training data. However, increasing awareness of privacy concerns poses new challenges to deep learning,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-08 Guile Wu , Shaogang Gong

Federated Learning (FL) has emerged as a powerful paradigm for training machine learning models in a decentralized manner, preserving data privacy by keeping local data on clients. However, evaluating the robustness of these models against…

Federated learning (FL) has been proposed as a privacy-preserving approach in distributed machine learning. A federated learning architecture consists of a central server and a number of clients that have access to private, potentially…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-03-06 Gergely Dániel Németh , Miguel Ángel Lozano , Novi Quadrianto , Nuria Oliver

Federated learning has emerged as a paradigm to train models collaboratively on inherently distributed client data while safeguarding privacy. In this context, personalized federated learning tackles the challenge of data heterogeneity by…

Machine Learning · Computer Science 2026-03-13 Peng Hu , Jianwei Ma

Federated recommendation system usually trains a global model on the server without direct access to users' private data on their own devices. However, this separation of the recommendation model and users' private data poses a challenge in…

Information Retrieval · Computer Science 2024-02-27 Chunxu Zhang , Guodong Long , Tianyi Zhou , Zijian Zhang , Peng Yan , Bo Yang

Recommender systems are proving to be an invaluable tool for extracting user-relevant content helping users in their daily activities (e.g., finding relevant places to visit, content to consume, items to purchase). However, to be effective,…

Information Retrieval · Computer Science 2023-05-10 Yacine Belal , Aurélien Bellet , Sonia Ben Mokhtar , Vlad Nitu

The marriage of federated learning and recommender system (FedRec) has been widely used to address the growing data privacy concerns in personalized recommendation services. In FedRecs, users' attribute information and behavior data (i.e.,…

Information Retrieval · Computer Science 2023-01-31 Wei Yuan , Chaoqun Yang , Quoc Viet Hung Nguyen , Lizhen Cui , Tieke He , Hongzhi Yin

Federated learning is a distributed machine learning approach in which a single server and multiple clients collaboratively build machine learning models without sharing datasets on clients. A challenging issue of federated learning is data…

Machine Learning · Computer Science 2022-06-28 Koji Matsuda , Yuya Sasaki , Chuan Xiao , Makoto Onizuka