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While prior work has shown that Federated Learning updates can leak sensitive information, label reconstruction attacks, which aim to recover input labels from shared gradients, have not yet been examined in the context of Human Activity…

Machine Learning · Computer Science 2025-08-08 Marius Bock , Maximilian Hopp , Kristof Van Laerhoven , Michael Moeller

Federated learning is considered as an effective privacy-preserving learning mechanism that separates the client's data and model training process. However, federated learning is still under the risk of privacy leakage because of the…

Machine Learning · Computer Science 2022-06-03 Yuxuan Wan , Han Xu , Xiaorui Liu , Jie Ren , Wenqi Fan , Jiliang Tang

Federated Learning (FL) allows for the training of Machine Learning models in a collaborative manner without the need to share sensitive data. However, it remains vulnerable to Gradient Leakage Attacks (GLAs), which can reveal private…

Machine Learning · Computer Science 2025-10-29 Miguel Fernandez-de-Retana , Unai Zulaika , Rubén Sánchez-Corcuera , Aitor Almeida

Federated Learning (FL) is a distributed learning framework, in which the local data never leaves clients devices to preserve privacy, and the server trains models on the data via accessing only the gradients of those local data. Without…

Machine Learning · Computer Science 2021-10-29 Jinwoo Jeon , Jaechang Kim , Kangwook Lee , Sewoong Oh , Jungseul Ok

Federated Learning (FL) exhibits privacy vulnerabilities under gradient inversion attacks (GIAs), which can extract private information from individual gradients. To enhance privacy, FL incorporates Secure Aggregation (SA) to prevent the…

Cryptography and Security · Computer Science 2024-06-25 Zhibo Wang , Zhiwei Chang , Jiahui Hu , Xiaoyi Pang , Jiacheng Du , Yongle Chen , Kui Ren

Federated Learning (FL) enables collaborative model building among a large number of participants without the need for explicit data sharing. But this approach shows vulnerabilities when privacy inference attacks are applied to it. In…

Machine Learning · Computer Science 2022-10-26 Pretom Roy Ovi , Emon Dey , Nirmalya Roy , Aryya Gangopadhyay

Federated Graph Neural Networks (FedGNNs) facilitate collaborative learning across multiple clients with graph-structured data while preserving user privacy. However, emerging research indicates that within this setting, shared model…

Machine Learning · Computer Science 2026-05-08 Suprim Nakarmi , Junggab Son , Yue Zhao , Zuobin Xiong

Typical machine learning approaches require centralized data for model training, which may not be possible where restrictions on data sharing are in place due to, for instance, privacy and gradient protection. The recently proposed…

Computer Vision and Pattern Recognition · Computer Science 2023-12-14 Hanchi Ren , Jingjing Deng , Xianghua Xie , Xiaoke Ma , Yichuan Wang

Federated learning (FL) is an emerging distributed machine learning paradigm proposed for privacy preservation. Unlike traditional centralized learning approaches, FL enables multiple users to collaboratively train a shared global model…

Cryptography and Security · Computer Science 2024-10-01 Hangyu Zhu , Liyuan Huang , Zhenping Xie

Federated Learning (FL) enables collaborative model training while preserving data privacy by keeping raw data locally stored on client devices, preventing access from other clients or the central server. However, recent studies reveal that…

Cryptography and Security · Computer Science 2025-09-26 Ren-Yi Huang , Dumindu Samaraweera , Prashant Shekhar , J. Morris Chang

Federated learning(FL) is an emerging distributed learning paradigm with default client privacy because clients can keep sensitive data on their devices and only share local training parameter updates with the federated server. However,…

Machine Learning · Computer Science 2021-07-05 Wenqi Wei , Ling Liu , Yanzhao Wu , Gong Su , Arun Iyengar

Federated Learning is a machine learning setting that reduces direct data exposure, improving the privacy guarantees of machine learning models. Yet, the exchange of model updates between the participants and the aggregator can still leak…

Machine Learning · Computer Science 2025-12-18 Pablo Montaña-Fernández , Ines Ortega-Fernandez

Federated learning (FL) has become a key component in various language modeling applications such as machine translation, next-word prediction, and medical record analysis. These applications are trained on datasets from many FL…

Cryptography and Security · Computer Science 2025-12-11 Md Rafi Ur Rashid , Vishnu Asutosh Dasu , Kang Gu , Najrin Sultana , Shagufta Mehnaz

Federated Learning (FL) has emerged as a machine learning approach able to preserve the privacy of user's data. Applying FL, clients train machine learning models on a local dataset and a central server aggregates the learned parameters…

Cryptography and Security · Computer Science 2024-09-27 Luiz Leite , Yuri Santo , Bruno L. Dalmazo , André Riker

Gradient inversion attack enables recovery of training samples from model gradients in federated learning (FL), and constitutes a serious threat to data privacy. To mitigate this vulnerability, prior work proposed both principled defenses…

Machine Learning · Computer Science 2023-06-13 Ruihan Wu , Xiangyu Chen , Chuan Guo , Kilian Q. Weinberger

Vertical federated learning (vFL) has gained much attention and been deployed to solve machine learning problems with data privacy concerns in recent years. However, some recent work demonstrated that vFL is vulnerable to privacy leakage…

Machine Learning · Computer Science 2022-05-26 Jiankai Sun , Xin Yang , Yuanshun Yao , Chong Wang

Federated learning (FL) is a privacy-preserving machine learning framework that enables multiple nodes to train models on their local data and periodically average weight updates to benefit from other nodes' training. Each node's goal is to…

Machine Learning · Computer Science 2025-06-16 Ethan Wilson , Kai Yue , Chau-Wai Wong , Huaiyu Dai

This paper presents a holistic approach to gradient leakage resilient distributed Stochastic Gradient Descent (SGD). First, we analyze two types of strategies for privacy-enhanced federated learning: (i) gradient pruning with random…

Machine Learning · Computer Science 2023-05-12 Wenqi Wei , Ling Liu , Jingya Zhou , Ka-Ho Chow , Yanzhao Wu

Federated Learning (FL) is designed to prevent data leakage through collaborative model training without centralized data storage. However, it remains vulnerable to gradient reconstruction attacks that recover original training data from…

Machine Learning · Computer Science 2024-11-07 Yuxiao Chen , Gamze Gürsoy , Qi Lei

The gradient inversion attack has been demonstrated as a significant privacy threat to federated learning (FL), particularly in continuous domains such as vision models. In contrast, it is often considered less effective or highly dependent…

Machine Learning · Computer Science 2025-07-30 Xinguo Feng , Zhongkui Ma , Zihan Wang , Eu Joe Chegne , Mengyao Ma , Alsharif Abuadbba , Guangdong Bai