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Federated learning (FL) is a distributed learning paradigm that preserves users' data privacy while leveraging the entire dataset of all participants. In FL, multiple models are trained independently on the clients and aggregated centrally…

Machine Learning · Computer Science 2023-01-11 Amin Eslami Abyane , Derui Zhu , Roberto Souza , Lei Ma , Hadi Hemmati

The increasing concern for data privacy has driven the rapid development of federated learning (FL), a privacy-preserving collaborative paradigm. However, the statistical heterogeneity among clients in FL results in inconsistent performance…

Machine Learning · Computer Science 2024-10-29 Zhichao Wang , Lin Wang , Yongxin Guo , Ying-Jun Angela Zhang , Xiaoying Tang

Federated Learning (FL) trains a global model across decentralized clients while preserving data privacy, but at scale it is vulnerable to malicious updates. Byzantine-resilient aggregation methods such as MultiKrum score gradients against…

Machine Learning · Computer Science 2026-05-19 Andras Ferenczi , Sutapa Samanta , Dagen Wang , Jason Qizhe Qin

Federated learning (FL) is a distributed machine learning paradigm where multiple clients conduct local training based on their private data, then the updated models are sent to a central server for global aggregation. The practical…

Machine Learning · Computer Science 2025-04-03 Harsh Vardhan , Xiaofan Yu , Tajana Rosing , Arya Mazumdar

Federated learning (FL) is a distributed machine learning approach where multiple clients collaboratively train a joint model without exchanging their data. Despite FL's unprecedented success in data privacy-preserving, its vulnerability to…

Machine Learning · Computer Science 2022-06-14 Jinyin Chen , Mingjun Li , Tao Liu , Haibin Zheng , Yao Cheng , Changting Lin

Federated learning (FL) has enabled multiple data owners (a.k.a. FL clients) to train machine learning models collaboratively without revealing private data. Since the FL server can only engage a limited number of clients in each training…

Machine Learning · Computer Science 2023-07-21 Yuxin Shi , Zelei Liu , Zhuan Shi , Han Yu

This paper develops a comprehensive framework to address three critical trustworthy challenges in federated learning (FL): robustness against Byzantine attacks, fairness, and privacy preservation. To improve the system's defense against…

Machine Learning · Computer Science 2025-03-06 Alina Basharat , Yijun Bian , Ping Xu , Zhi Tian

Federated Learning (FL) is a distributed learning paradigm where clients collaboratively train a model while keeping their own data private. With an increasing scale of clients and models, FL encounters two key challenges, client drift due…

Machine Learning · Computer Science 2025-01-20 Jianhui Sun , Xidong Wu , Heng Huang , Aidong Zhang

Federated Learning (FL) has recently emerged as a promising paradigm for privacy-preserving, distributed machine learning. However, FL systems face significant security threats, particularly from adaptive adversaries capable of modifying…

Cryptography and Security · Computer Science 2025-12-03 Jakub Kacper Szelag , Ji-Jian Chin , Lauren Ansell , Sook-Chin Yip

Federated Learning (FL), a privacy-aware approach in distributed deep learning environments, enables many clients to collaboratively train a model without sharing sensitive data, thereby reducing privacy risks. However, enabling human trust…

Machine Learning · Computer Science 2025-11-14 Dario Fenoglio , Gabriele Dominici , Pietro Barbiero , Alberto Tonda , Martin Gjoreski , Marc Langheinrich

Federated learning (FL) is a promising distributed learning framework where distributed clients collaboratively train a machine learning model coordinated by a server. To tackle the stragglers issue in asynchronous FL, we consider that each…

Machine Learning · Computer Science 2023-11-29 Jiarong Yang , Yuan Liu , Fangjiong Chen , Wen Chen , Changle Li

Federated learning (FL) enables a set of geographically distributed clients to collectively train a model through a server. Classically, the training process is synchronous, but can be made asynchronous to maintain its speed in presence of…

Machine Learning · Computer Science 2024-06-21 Bart Cox , Abele Mălan , Lydia Y. Chen , Jérémie Decouchant

Federated Learning (FL) enables multiple clients to collaboratively train models without sharing raw data, but is vulnerable to Byzantine attacks and data heterogeneity, which can severely degrade performance. Existing Byzantine-robust…

Machine Learning · Computer Science 2025-10-28 Shiyuan Zuo , Xingrun Yan , Rongfei Fan , Li Shen , Puning Zhao , Jie Xu , Han Hu

We propose FedGT, a novel framework for identifying malicious clients in federated learning with secure aggregation. Inspired by group testing, the framework leverages overlapping groups of clients to identify the presence of malicious…

Machine Learning · Computer Science 2024-07-11 Marvin Xhemrishi , Johan Östman , Antonia Wachter-Zeh , Alexandre Graell i Amat

Federated learning (FL) enables privacy-preserving model training by keeping data decentralized. However, it remains vulnerable to label-flipping attacks, where malicious clients manipulate labels to poison the global model. Despite their…

While Federated learning (FL) is attractive for pulling privacy-preserving distributed training data, the credibility of participating clients and non-inspectable data pose new security threats, of which poisoning attacks are particularly…

Cryptography and Security · Computer Science 2023-09-20 Zizhen Liu , Weiyang He , Chip-Hong Chang , Jing Ye , Huawei Li , Xiaowei Li

Sybil attacks pose a significant threat to federated learning, as malicious nodes can collaborate and gain a majority, thereby overwhelming the system. Therefore, it is essential to develop countermeasures that ensure the security of…

Machine Learning · Computer Science 2025-08-05 Qi Xiong , Hai Dong , Nasrin Sohrabi , Zahir Tari

Federated learning (FL), as an emerging artificial intelligence (AI) approach, enables decentralized model training across multiple devices without exposing their local training data. FL has been increasingly gaining popularity in both…

Machine Learning · Computer Science 2023-10-23 Victoria Huang , Shaleeza Sohail , Michael Mayo , Tania Lorido Botran , Mark Rodrigues , Chris Anderson , Melanie Ooi

Federated learning offers a framework of training a machine learning model in a distributed fashion while preserving privacy of the participants. As the server cannot govern the clients' actions, nefarious clients may attack the global…

Cryptography and Security · Computer Science 2022-08-23 Ashish Gupta , Tie Luo , Mao V. Ngo , Sajal K. Das

Federated learning (FL) is a popular distributed learning framework that trains a global model through iterative communications between a central server and edge devices. Recent works have demonstrated that FL is vulnerable to model…

Machine Learning · Computer Science 2021-10-27 Jingwei Sun , Ang Li , Louis DiValentin , Amin Hassanzadeh , Yiran Chen , Hai Li