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Federated learning systems are vulnerable to attacks from malicious clients. As the central server in the system cannot govern the behaviors of the clients, a rogue client may initiate an attack by sending malicious model updates to the…

Machine Learning · Computer Science 2020-02-04 Suyi Li , Yong Cheng , Wei Wang , Yang Liu , Tianjian Chen

Federated Learning (FL) enables clients to collaboratively train a global model without sharing their private data. However, the presence of malicious (Byzantine) clients poses significant challenges to the robustness of FL, particularly…

Machine Learning · Computer Science 2026-05-26 Javad Parsa , Amir Hossein Daghestani , André M. H. Teixeira , Mikael Johansson

Recent works have brought attention to the vulnerability of Federated Learning (FL) systems to gradient leakage attacks. Such attacks exploit clients' uploaded gradients to reconstruct their sensitive data, thereby compromising the privacy…

Machine Learning · Computer Science 2025-06-11 Mingyuan Fan , Cen Chen , Chengyu Wang , Xiaodan Li , Wenmeng Zhou

Federated learning enables learning from decentralized data sources without compromising privacy, which makes it a crucial technique. However, it is vulnerable to model poisoning attacks, where malicious clients interfere with the training…

Cryptography and Security · Computer Science 2023-07-19 Sungwon Park , Sungwon Han , Fangzhao Wu , Sundong Kim , Bin Zhu , Xing Xie , Meeyoung Cha

Federated learning (FL), an emerging distributed machine learning paradigm, has been applied to various privacy-preserving scenarios. However, due to its distributed nature, FL faces two key issues: the non-independent and identical…

Machine Learning · Computer Science 2024-10-18 Youpeng Li , Xinda Wang , Fuxun Yu , Lichao Sun , Wenbin Zhang , Xuyu Wang

Distributed Federated Learning (DFL) enables decentralized model training across large-scale systems without a central parameter server. However, DFL faces three critical challenges: privacy leakage from honest-but-curious neighbors, slow…

Machine Learning · Computer Science 2026-02-24 Nuocheng Yang , Sihua Wang , Zhaohui Yang , Mingzhe Chen , Changchuan Yin , Kaibin Huang

Federated learning (FL) allows the collaborative training of AI models without needing to share raw data. This capability makes it especially interesting for healthcare applications where patient and data privacy is of utmost concern.…

Federated learning (FL) provides a variety of privacy advantages by allowing clients to collaboratively train a model without sharing their private data. However, recent studies have shown that private information can still be leaked…

Machine Learning · Computer Science 2023-04-12 Yue Cui , Syed Irfan Ali Meerza , Zhuohang Li , Luyang Liu , Jiaxin Zhang , Jian Liu

Federated Learning (FL) emerged as a paradigm for conducting machine learning across broad and decentralized datasets, promising enhanced privacy by obviating the need for direct data sharing. However, recent studies show that attackers can…

Computation and Language · Computer Science 2024-11-28 Xueluan Gong , Yuji Wang , Shuaike Li , Mengyuan Sun , Songze Li , Qian Wang , Kwok-Yan Lam , Chen Chen

Federated learning (FL) allows multiple clients to collaboratively train a global machine learning model through a server, without exchanging their private training data. However, the decentralized aspect of FL makes it susceptible to…

Cryptography and Security · Computer Science 2025-01-30 Minghong Fang , Seyedsina Nabavirazavi , Zhuqing Liu , Wei Sun , Sundararaja Sitharama Iyengar , Haibo Yang

In federated learning (FL), profiling and verifying each client is inherently difficult, which introduces a significant security vulnerability: malicious clients, commonly referred to as Byzantines, can degrade the accuracy of the global…

Machine Learning · Computer Science 2026-05-07 Emre Ozfatura , Kerem Ozfatura , Baturalp Buyukates , Mert Coskuner , Alptekin Kupcu , Deniz Gunduz

Federated learning (FL) becomes vulnerable to Byzantine attacks where some of participators tend to damage the utility or discourage the convergence of the learned model via sending their malicious model updates. Previous works propose to…

Cryptography and Security · Computer Science 2024-08-13 Fangyuan Zhao , Yuexiang Xie , Xuebin Ren , Bolin Ding , Shusen Yang , Yaliang Li

Federated learning (FL) is a machine learning (ML) approach that allows the use of distributed data without compromising personal privacy. However, the heterogeneous distribution of data among clients in FL can make it difficult for the…

Machine Learning · Computer Science 2023-03-07 Thuy Dung Nguyen , Tuan Nguyen , Phi Le Nguyen , Hieu H. Pham , Khoa Doan , Kok-Seng Wong

In federated learning, multiple client devices jointly learn a machine learning model: each client device maintains a local model for its local training dataset, while a master device maintains a global model via aggregating the local…

Cryptography and Security · Computer Science 2021-11-23 Minghong Fang , Xiaoyu Cao , Jinyuan Jia , Neil Zhenqiang Gong

Federated learning (FL) allows a server to learn a machine learning (ML) model across multiple decentralized clients that privately store their own training data. In contrast with centralized ML approaches, FL saves computation to the…

Cryptography and Security · Computer Science 2020-12-15 Alberto Blanco-Justicia , Josep Domingo-Ferrer , Sergio Martínez , David Sánchez , Adrian Flanagan , Kuan Eeik Tan

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) enables collaborative model training across multiple clients while preserving data privacy by keeping local datasets on-device. In this work, we address FL settings where clients may behave adversarially, exhibiting…

Machine Learning · Computer Science 2025-08-26 Emmanouil Kritharakis , Antonios Makris , Dusan Jakovetic , Konstantinos Tserpes

Federated Learning (FL), a distributed machine learning paradigm, has been adapted to mitigate privacy concerns for customers. Despite their appeal, there are various inference attacks that can exploit shared-plaintext model updates to…

Cryptography and Security · Computer Science 2022-07-20 Hua Ma , Qun Li , Yifeng Zheng , Zhi Zhang , Xiaoning Liu , Yansong Gao , Said F. Al-Sarawi , Derek Abbott

The rapid development of artificial intelligence systems has amplified societal concerns regarding their usage, necessitating regulatory frameworks that encompass data privacy. Federated Learning (FL) is posed as potential solution to data…

Machine Learning · Computer Science 2025-03-28 Mario García-Márquez , Nuria Rodríguez-Barroso , M. Victoria Luzón , Francisco Herrera

Federated Learning (FL) paradigms enable large numbers of clients to collaboratively train Machine Learning models on private data. However, due to their multi-party nature, traditional FL schemes are left vulnerable to Byzantine attacks…

Machine Learning · Computer Science 2024-10-31 Atharv Deshmukh