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Federated Learning has rapidly expanded from its original inception to now have a large body of research, several frameworks, and sold in a variety of commercial offerings. Thus, its security and robustness is of significant importance.…

Cryptography and Security · Computer Science 2025-10-02 Simone Bottoni , Giulio Zizzo , Stefano Braghin , Alberto Trombetta

Federated learning is the centralized training of statistical models from decentralized data on mobile devices while preserving the privacy of each device. We present a robust aggregation approach to make federated learning robust to…

Machine Learning · Statistics 2023-08-04 Krishna Pillutla , Sham M. Kakade , Zaid Harchaoui

Secure model aggregation across many users is a key component of federated learning systems. The state-of-the-art protocols for secure model aggregation, which are based on additive masking, require all users to quantize their model updates…

Information Theory · Computer Science 2021-11-17 Ahmed Roushdy Elkordy , A. Salman Avestimehr

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

The pervasive adoption of Internet-connected digital services has led to a growing concern in the personal data privacy of their customers. On the other hand, machine learning (ML) techniques have been widely adopted by digital service…

Cryptography and Security · Computer Science 2021-05-13 Jiale Guo , Ziyao Liu , Kwok-Yan Lam , Jun Zhao , Yiqiang Chen , Chaoping Xing

Deep learning (DL) approaches are achieving extraordinary results in a wide range of domains, but often require a massive collection of private data. Hence, methods for training neural networks on the joint data of different data owners,…

Cryptography and Security · Computer Science 2021-10-27 Derian Boer , Stefan Kramer

Secure linear aggregation is to linearly aggregate private inputs of different users with privacy protection. The server in a federated learning (FL) environment can fulfill any linear computation on private inputs of users through the…

Cryptography and Security · Computer Science 2021-11-23 Haibo Tian , Fangguo Zhang , Yunfeng Shao , Bingshuai 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 learning has recently emerged as a paradigm promising the benefits of harnessing rich data from diverse sources to train high quality models, with the salient features that training datasets never leave local devices. Only model…

Cryptography and Security · Computer Science 2022-02-07 Yifeng Zheng , Shangqi Lai , Yi Liu , Xingliang Yuan , Xun Yi , Cong Wang

In this paper, we investigate the transmission latency of the secure aggregation problem in a \emph{wireless} federated learning system with multiple curious servers. We propose a privacy-preserving coded aggregation scheme where the…

Information Theory · Computer Science 2025-07-01 Zhenhao Huang , Kai Liang , Yuanming Shi , Songze Li , Youlong Wu

In federated learning, a federator coordinates the training of a model, e.g., a neural network, on privately owned data held by several participating clients. The gradient descent algorithm, a well-known and popular iterative optimization…

Machine Learning · Computer Science 2024-07-19 Maximilian Egger , Christoph Hofmeister , Antonia Wachter-Zeh , Rawad Bitar

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 is a promising framework for learning over decentralized data spanning multiple regions. This approach avoids expensive central training data aggregation cost and can improve privacy because distributed sites do not have…

Machine Learning · Computer Science 2021-01-01 Beomyeol Jeon , S. M. Ferdous , Muntasir Raihan Rahman , Anwar Walid

For model privacy, local model parameters in federated learning shall be obfuscated before sent to the remote aggregator. This technique is referred to as \emph{secure aggregation}. However, secure aggregation makes model poisoning attacks…

Cryptography and Security · Computer Science 2024-04-26 Zhuosheng Zhang , Jiarui Li , Shucheng Yu , Christian Makaya

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

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

This work studies privacy-preserving federated learning (ppFL) under unreliable communication. In ppFL, zero-sum privacy noises enables privacy protection without sacrificing model accuracy, effectively overcoming the privacy-utility…

Information Theory · Computer Science 2025-12-16 Shudi Weng , Chao Ren , Yizhou Zhao , Ming Xiao , Mikael Skoglund

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

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

Decentralized learning (DL) faces increased vulnerability to privacy breaches due to sophisticated attacks on machine learning (ML) models. Secure aggregation is a computationally efficient cryptographic technique that enables multiple…

Machine Learning · Computer Science 2024-05-15 Sayan Biswas , Anne-Marie Kermarrec , Rafael Pires , Rishi Sharma , Milos Vujasinovic