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This paper studies the information theoretic secure aggregation problem in a three-layer hierarchical network with arbitrary heterogeneous data assignment, where clustered users communicate with an aggregation server through an intermediate…

Information Theory · Computer Science 2026-04-15 Chenyi Sun , Ziting Zhang , Kai Wan , Xiang Zhang

In this article, we address the problem of federated learning in the presence of stragglers. For this problem, a coded federated learning framework has been proposed, where the central server aggregates gradients received from the…

Signal Processing · Electrical Eng. & Systems 2025-08-07 Chengxi Li , Ming Xiao , Mikael Skoglund

Secure Multiparty Computation (MPC) can improve the security and privacy of data owners while allowing analysts to perform high quality analytics. Secure aggregation is a secure distributed mechanism to support federated deep learning…

Cryptography and Security · Computer Science 2022-05-04 Timothy Stevens , Joseph Near , Christian Skalka

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

Train machine learning models on sensitive user data has raised increasing privacy concerns in many areas. Federated learning is a popular approach for privacy protection that collects the local gradient information instead of real data.…

Cryptography and Security · Computer Science 2021-05-24 Lichao Sun , Jianwei Qian , Xun Chen

Federated learning has become a widely used paradigm for collaboratively training a common model among different participants with the help of a central server that coordinates the training. Although only the model parameters or other model…

Cryptography and Security · Computer Science 2023-10-31 Raouf Kerkouche , Gergely Ács , Mario Fritz

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 (FL) framework brings privacy benefits to distributed learning systems by allowing multiple clients to participate in a learning task under the coordination of a central server without exchanging their private data.…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Zhuohang Li , Jiaxin Zhang , Luyang Liu , Jian Liu

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

The federated learning (FL) technique was developed to mitigate data privacy issues in the traditional machine learning paradigm. While FL ensures that a user's data always remain with the user, the gradients are shared with the centralized…

Artificial Intelligence · Computer Science 2024-10-08 Yogachandran Rahulamathavan , Charuka Herath , Xiaolan Liu , Sangarapillai Lambotharan , Carsten Maple

Federated learning enables the collaborative learning of a global model on diverse data, preserving data locality and eliminating the need to transfer user data to a central server. However, data privacy remains vulnerable, as attacks can…

Cryptography and Security · Computer Science 2024-10-21 Yiwei Zhang , Rouzbeh Behnia , Attila A. Yavuz , Reza Ebrahimi , Elisa Bertino

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…

In federated learning, multiple parties can cooperate to train the model without directly exchanging their own private data, but the gradient leakage problem still threatens the privacy security and model integrity. Although the existing…

Cryptography and Security · Computer Science 2025-11-18 Minjie Wang , Jinguang Han , Weizhi Meng

Privacy concerns arise as sensitive data proliferate. Despite decentralized federated learning (DFL) aggregating gradients from neighbors to avoid direct data transmission, it still poses indirect data leaks from the transmitted gradients.…

Machine Learning · Computer Science 2025-02-05 Xiaoye Miao , Bin Li , Yanzhang , Xinkui Zhao , Yangyang Wu

News recommendation is critical for personalized news access. Most existing news recommendation methods rely on centralized storage of users' historical news click behavior data, which may lead to privacy concerns and hazards. Federated…

Information Retrieval · Computer Science 2023-05-31 Jingwei Yi , Fangzhao Wu , Chuhan Wu , Ruixuan Liu , Guangzhong Sun , Xing Xie

Recent advances in differentially private federated learning (DPFL) algorithms have found that using correlated noise across the rounds of federated learning (DP-FTRL) yields provably and empirically better accuracy than using independent…

Cryptography and Security · Computer Science 2024-10-16 Marshall Ball , James Bell-Clark , Adria Gascon , Peter Kairouz , Sewoong Oh , Zhiye Xie

Federated learning obtains a central model on the server by aggregating models trained locally on clients. As a result, federated learning does not require clients to upload their data to the server, thereby preserving the data privacy of…

Machine Learning · Computer Science 2020-08-31 Yang Chen , Xiaoyan Sun , Yaochu Jin

We show that aggregated model updates in federated learning may be insecure. An untrusted central server may disaggregate user updates from sums of updates across participants given repeated observations, enabling the server to recover…

Cryptography and Security · Computer Science 2021-06-14 Maximilian Lam , Gu-Yeon Wei , David Brooks , Vijay Janapa Reddi , Michael Mitzenmacher

Bidirectional privacy-preservation federated learning is crucial as both local gradients and the global model may leak privacy. However, only a few works attempt to achieve it, and they often face challenges such as excessive communication…

Machine Learning · Computer Science 2024-12-17 Xue Yang , Depan Peng , Yan Feng , Xiaohu Tang , Weijun Fang , Jun Shao

Secure aggregation is a critical component in federated learning (FL), which enables the server to learn the aggregate model of the users without observing their local models. Conventionally, secure aggregation algorithms focus only on…

Machine Learning · Computer Science 2023-07-28 Jinhyun So , Ramy E. Ali , Basak Guler , Jiantao Jiao , Salman Avestimehr