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Since the first theoretically feasible full homomorphic encryption (FHE) scheme was proposed in 2009, great progress has been achieved. These improvements have made FHE schemes come off the paper and become quite useful in solving some…

Cryptography and Security · Computer Science 2024-03-19 Yuqi Guo , Lin Li , Zhongxiang Zheng , Hanrui Yun , Ruoyan Zhang , Xiaolin Chang , Zhixuan Gao

Federated Learning (FL) enables collaborative model training across institutions without sharing raw data. However, gradient sharing still risks privacy leakage, such as gradient inversion attacks. Homomorphic Encryption (HE) can secure…

Machine Learning · Computer Science 2025-10-27 Jiaqi Xue , Mayank Kumar , Yuzhang Shang , Shangqian Gao , Rui Ning , Mengxin Zheng , Xiaoqian Jiang , Qian Lou

Federated Learning (FL) enables collaborative model training without centralizing client data, making it attractive for privacy-sensitive domains. While existing approaches employ cryptographic techniques such as homomorphic encryption,…

Cryptography and Security · Computer Science 2026-02-09 Sahar Ghoflsaz Ghinani , Elaheh Sadredini

Federated learning (FL) enables multiple clients to jointly train a global model under the coordination of a central server. Although FL is a privacy-aware paradigm, where raw data sharing is not required, recent studies have shown that FL…

Homomorphic encryption is a very useful gradient protection technique used in privacy preserving federated learning. However, existing encrypted federated learning systems need a trusted third party to generate and distribute key pairs to…

Cryptography and Security · Computer Science 2020-11-26 Hangyu Zhu , Rui Wang , Yaochu Jin , Kaitai Liang , Jianting Ning

Protecting sensitive health data while enabling collaborative analysis is a central challenge in healthcare. Traditional machine learning (ML) requires institutions to pool anonymized patient records, centralizing analytical development and…

Machine Learning · Computer Science 2026-05-05 Gaurang Sharma , Juha Pajula , Aada Illikainen , Markus Rautell , Noora Lipsonen , Petri Alhainen , Mika Hilvo

Federated Learning (FL) faces inherent challenges in balancing model performance, privacy preservation, and communication efficiency, especially in non-IID decentralized environments. Recent approaches either sacrifice formal privacy…

Machine Learning · Computer Science 2026-05-14 Md Abrar Jahin , Taufikur Rahman Fuad , M. F. Mridha , Nafiz Fahad , Md. Jakir Hossen

Omics data is widely employed in medical research to identify disease mechanisms and contains highly sensitive personal information. Federated Learning (FL) with Differential Privacy (DP) can ensure the protection of omics data privacy…

Cryptography and Security · Computer Science 2025-11-11 Yusaku Negoya , Feifei Cui , Zilong Zhang , Miao Pan , Tomoaki Ohtsuki , Aohan Li

In recent years, data are typically distributed in multiple organizations while the data security is becoming increasingly important. Federated Learning (FL), which enables multiple parties to collaboratively train a model without…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-03-13 Ji Liu , Xuehai Zhou , Lei Mo , Shilei Ji , Yuan Liao , Zheng Li , Qin Gu , Dejing Dou

Federated Learning (FL) is a machine learning technique that enables multiple entities to collaboratively learn a shared model without exchanging their local data. Over the past decade, FL systems have achieved substantial progress, scaling…

Machine Learning · Computer Science 2025-03-04 Katharine Daly , Hubert Eichner , Peter Kairouz , H. Brendan McMahan , Daniel Ramage , Zheng Xu

The integration of fully homomorphic encryption (FHE) in federated learning (FL) has led to significant advances in data privacy. However, during the aggregation phase, it often results in performance degradation of the aggregated model,…

Federated learning (FL) is an emerging machine learning paradigm involving multiple clients, e.g., mobile phone devices, with an incentive to collaborate in solving a machine learning problem coordinated by a central server. FL was proposed…

Machine Learning · Computer Science 2022-07-04 Samuel Horváth

Federated learning (FL) enables clients to collaborate with a server to train a machine learning model. To ensure privacy, the server performs secure aggregation of updates from the clients. Unfortunately, this prevents verification of the…

Cryptography and Security · Computer Science 2022-09-13 Amrita Roy Chowdhury , Chuan Guo , Somesh Jha , Laurens van der Maaten

Privacy-preserving federated learning (PPFL) aims to train a global model for multiple clients while maintaining their data privacy. However, current PPFL protocols exhibit one or more of the following insufficiencies: considerable…

Cryptography and Security · Computer Science 2025-09-09 Wenhan Dong , Chao Lin , Xinlei He , Shengmin Xu , Xinyi Huang

Quantum Federated Learning (QFL) enables distributed training of Quantum Machine Learning (QML) models by sharing model gradients instead of raw data. However, these gradients can still expose sensitive user information. To enhance privacy,…

Cryptography and Security · Computer Science 2026-03-04 Lukas Böhm , Arjhun Swaminathan , Anika Hannemann , Erik Buchmann

Federated learning (FL) enables collaborative model training across decentralized datasets. NVIDIA FLARE's Federated XGBoost extends the popular XGBoost algorithm to both vertical and horizontal federated settings, facilitating joint model…

Cryptography and Security · Computer Science 2025-04-08 Ziyue Xu , Yuan-Ting Hsieh , Zhihong Zhang , Holger R. Roth , Chester Chen , Yan Cheng , Andrew Feng

In sectors such as finance and healthcare, where data governance is subject to rigorous regulatory requirements, the exchange and utilization of data are particularly challenging. Federated Learning (FL) has risen as a pioneering…

Cryptography and Security · Computer Science 2024-08-13 Siyang Jiang , Hao Yang , Qipeng Xie , Chuan Ma , Sen Wang , Guoliang Xing

The majority of work in privacy-preserving federated learning (FL) has been focusing on horizontally partitioned datasets where clients share the same sets of features and can train complete models independently. However, in many…

Machine Learning · Computer Science 2023-05-22 Xinchi Qiu , Heng Pan , Wanru Zhao , Chenyang Ma , Pedro Porto Buarque de Gusmão , Nicholas D. Lane

Homomorphic encryption (HE) enables privacy-preserving aggregation in federated learning (FL) by allowing the server to operate on encrypted data without decryption. Existing HE-over-the-air methods mainly rely on single-key HE schemes and…

Cryptography and Security · Computer Science 2026-05-29 Anthony Ayli , Khalil Harris , Jihad Fahs , Mohamad Assaad

Federated learning (FL) refers to a distributed machine learning framework involving learning from several decentralized edge clients without sharing local dataset. This distributed strategy prevents data leakage and enables on-device…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-03-28 Taki Hasan Rafi , Faiza Anan Noor , Tahmid Hussain , Dong-Kyu Chae , Zhaohui Yang