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Federated Learning (FL) is a promising distributed learning framework designed for privacy-aware applications. FL trains models on client devices without sharing the client's data and generates a global model on a server by aggregating…

Federated learning (FL) enables collaborative model training by aggregating local updates without requiring raw data sharing. However, prior studies have shown that servers can exploit gradient inversion to compromise user privacy or…

Cryptography and Security · Computer Science 2026-05-26 Yufei Zhou

Federated learning is a computing paradigm that enhances privacy by enabling multiple parties to collaboratively train a machine learning model without revealing personal data. However, current research indicates that traditional federated…

Cryptography and Security · Computer Science 2025-01-10 Runhua Xu , Bo Li , Chao Li , James B. D. Joshi , Shuai Ma , Jianxin Li

Federated learning enables collaborative model training across distributed clients, yet vanilla FL exposes client updates to the central server. Secure-aggregation schemes protect privacy against an honest-but-curious server, but existing…

Cryptography and Security · Computer Science 2026-05-14 Haaris Mehmood , Giorgos Tatsis , Dimitrios Alexopoulos , Karthikeyan Saravanan , Jie Xu , Anastasios Drosou , Mete Ozay

Federated Averaging remains the most widely used aggregation strategy in federated learning due to its simplicity and scalability. However, its performance degrades significantly in non-IID data settings, where client distributions are…

Machine Learning · Computer Science 2025-03-07 Marco Arazzi , Mert Cihangiroglu , Antonino Nocera

Federated Learning trains machine learning models on distributed devices by aggregating local model updates instead of local data. However, privacy concerns arise as the aggregated local models on the server may reveal sensitive personal…

Machine Learning · Computer Science 2024-06-18 Weizhao Jin , Yuhang Yao , Shanshan Han , Jiajun Gu , Carlee Joe-Wong , Srivatsan Ravi , Salman Avestimehr , Chaoyang He

Federated machine learning leverages edge computing to develop models from network user data, but privacy in federated learning remains a major challenge. Techniques using differential privacy have been proposed to address this, but bring…

Cryptography and Security · Computer Science 2021-12-14 Timothy Stevens , Christian Skalka , Christelle Vincent , John Ring , Samuel Clark , Joseph Near

Federated Semi-Supervised Learning (FSSL) aims to leverage unlabeled data across clients with limited labeled data to train a global model with strong generalization ability. Most FSSL methods rely on consistency regularization with…

Machine Learning · Computer Science 2025-03-18 Yijie Liu , Xinyi Shang , Yiqun Zhang , Yang Lu , Chen Gong , Jing-Hao Xue , Hanzi Wang

How can we debug a logistical regression model in a federated learning setting when seeing the model behave unexpectedly (e.g., the model rejects all high-income customers' loan applications)? The SQL-based training data debugging framework…

Machine Learning · Computer Science 2021-08-27 Yejia Liu , Weiyuan Wu , Lampros Flokas , Jiannan Wang , Eugene Wu

Hierarchical federated learning (HFL) has emerged as an effective paradigm to enhance link quality between clients and the server. However, ensuring model accuracy while preserving privacy under unreliable communication remains a key…

Machine Learning · Computer Science 2026-01-27 Shudi Weng , Ming Xiao , Mikael Skoglund

Federated Learning (FL) enables multiple users to collaboratively train a machine learning model without sharing raw data, making it suitable for privacy-sensitive applications. However, local model or weight updates can still leak…

Federated learning has been spotlighted as a way to train neural networks using distributed data with no need for individual nodes to share data. Unfortunately, it has also been shown that adversaries may be able to extract local data…

Machine Learning · Computer Science 2021-07-13 Beongjun Choi , Jy-yong Sohn , Dong-Jun Han , Jaekyun Moon

In this work, we consider the problem of designing secure and efficient federated learning (FL) frameworks. Existing solutions either involve a trusted aggregator or require heavyweight cryptographic primitives, which degrades performance…

Cryptography and Security · Computer Science 2022-01-31 Jieren Deng , Chenghong Wang , Xianrui Meng , Yijue Wang , Ji Li , Sheng Lin , Shuo Han , Fei Miao , Sanguthevar Rajasekaran , Caiwen Ding

Deploying federated learning (FL) in real-world scenarios, particularly in healthcare, poses challenges in communication and security. In particular, with respect to the federated aggregation procedure, researchers have been focusing on the…

Cryptography and Security · Computer Science 2024-09-04 Riccardo Taiello , Sergen Cansiz , Marc Vesin , Francesco Cremonesi , Lucia Innocenti , Melek Önen , Marco Lorenzi

Asynchronous federated learning (AFL) is an effective method to address the challenge of device heterogeneity in cross-device federated learning. However, AFL is usually incompatible with existing secure aggregation protocols used to…

Cryptography and Security · Computer Science 2024-06-07 Kun Wang , Yi-Rui Yang , Wu-Jun Li

Federated learning is highly valued due to its high-performance computing in distributed environments while safeguarding data privacy. To address resource heterogeneity, researchers have proposed a semi-asynchronous federated learning…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-05-28 Yunbo Li , Jiaping Gui , Yue Wu

In federated learning, multiple parties train models locally and share their parameters with a central server, which aggregates them to update a global model. To address the risk of exposing sensitive data through local models, secure…

Federated Learning (FL) is a machine learning paradigm to conduct collaborative learning among clients on a joint model. The primary goal is to share clients' local training parameters with an integrating server while preserving their…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Mahdi Ghafourian , Julian Fierrez , Ruben Vera-Rodriguez , Ruben Tolosana , Aythami Morales

We consider a federated representation learning framework, where with the assistance of a central server, a group of $N$ distributed clients train collaboratively over their private data, for the representations (or embeddings) of a set of…

Machine Learning · Computer Science 2023-05-05 Jiaxiang Tang , Jinbao Zhu , Songze Li , Lichao Sun

Secure aggregation (SecAgg) is a commonly-used privacy-enhancing mechanism in federated learning, affording the server access only to the aggregate of model updates while safeguarding the confidentiality of individual updates. Despite…

Machine Learning · Computer Science 2024-07-16 Khac-Hoang Ngo , Johan Östman , Giuseppe Durisi , Alexandre Graell i Amat