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Model poisoning attacks greatly jeopardize the application of federated learning (FL). The effectiveness of existing defenses is susceptible to the latest model poisoning attacks, leading to a decrease in prediction accuracy. Besides, these…

Cryptography and Security · Computer Science 2023-10-10 Haonan Yan , Wenjing Zhang , Qian Chen , Xiaoguang Li , Wenhai Sun , Hui Li , Xiaodong Lin

Federated learning is a promising direction to tackle the privacy issues related to sharing patients' sensitive data. Often, federated systems in the medical image analysis domain assume that the participating local clients are…

Machine Learning · Computer Science 2023-08-16 Indu Joshi , Priyank Upadhya , Gaurav Kumar Nayak , Peter Schüffler , Nassir Navab

Federated Learning remains highly susceptible to backdoor attacks--malicious clients inject targeted behaviours into the global model. Existing defenses suffer from substantial false-positive rates under realistic non-independent and…

Cryptography and Security · Computer Science 2026-05-13 Fatima Z. Abacha , Sin G. Teo , Yuanxiang Wu , Lucas C. Cordeiro , Mustafa A. Mustafa

Federated learning enables training high-utility models across several clients without directly sharing their private data. As a downside, the federated setting makes the model vulnerable to various adversarial attacks in the presence of…

Machine Learning · Computer Science 2024-03-12 Xiaoyang Wang , Dimitrios Dimitriadis , Sanmi Koyejo , Shruti Tople

Federated Averaging remains the most widely used aggregation strategy in federated learning due to its simplicity and scalability. However, its performance degrades significantly in non-IID data settings, where client distributions are…

Machine Learning · Computer Science 2025-03-07 Marco Arazzi , Mert Cihangiroglu , Antonino Nocera

Gradient-based training in federated learning is known to be vulnerable to faulty/malicious clients, which are often modeled as Byzantine clients. To this end, previous work either makes use of auxiliary data at parameter server to verify…

Machine Learning · Computer Science 2023-05-02 Jian Xu , Shao-Lun Huang , Linqi Song , Tian Lan

Federated Learning (FL) is a distributed learning paradigm that enhances users privacy by eliminating the need for clients to share raw, private data with the server. Despite the success, recent studies expose the vulnerability of FL to…

Machine Learning · Computer Science 2023-12-15 Jing Wu , Munawar Hayat , Mingyi Zhou , Mehrtash Harandi

Despite federated learning (FL)'s potential in collaborative learning, its performance has deteriorated due to the data heterogeneity of distributed users. Recently, clustered federated learning (CFL) has emerged to address this challenge…

Cryptography and Security · Computer Science 2025-06-17 Zhiqiang Li , Haiyong Bao , Menghong Guan , Hao Pan , Cheng Huang , Hong-Ning Dai

In federated learning (FL), robust aggregation schemes have been developed to protect against malicious clients. Many robust aggregation schemes rely on certain numbers of benign clients being present in a quorum of workers. This can be…

Machine Learning · Computer Science 2021-12-21 Giulio Zizzo , Ambrish Rawat , Mathieu Sinn , Sergio Maffeis , Chris Hankin

Federated Learning (FL) enables distributed participants (e.g., mobile devices) to train a global model without sharing data directly to a central server. Recent studies have revealed that FL is vulnerable to gradient inversion attack…

Cryptography and Security · Computer Science 2023-09-15 Jiaheng Wei , Yanjun Zhang , Leo Yu Zhang , Chao Chen , Shirui Pan , Kok-Leong Ong , Jun Zhang , Yang Xiang

Federated learning has gained popularity as a solution to data availability and privacy challenges in machine learning. However, the aggregation process of local model updates to obtain a global model in federated learning is susceptible to…

Machine Learning · Computer Science 2023-03-22 Charuka Herath , Yogachandran Rahulamathavan , Xiaolan Liu

Federated learning, as a distributed learning that conducts the training on the local devices without accessing to the training data, is vulnerable to Byzatine poisoning adversarial attacks. We argue that the federated learning model has to…

Machine Learning · Computer Science 2022-09-20 Nuria Rodríguez-Barroso , Eugenio Martínez-Cámara , M. Victoria Luzón , Francisco Herrera

The increasing access to data poses both opportunities and risks in deep learning, as one can manipulate the behaviors of deep learning models with malicious training samples. Such attacks are known as data poisoning. Recent advances in…

Machine Learning · Computer Science 2023-06-29 Wenxiao Wang , Soheil Feizi

Federated learning---multi-party, distributed learning in a decentralized environment---is vulnerable to model poisoning attacks, even more so than centralized learning approaches. This is because malicious clients can collude and send in…

Machine Learning · Computer Science 2021-10-20 Atul Sharma , Wei Chen , Joshua Zhao , Qiang Qiu , Somali Chaterji , Saurabh Bagchi

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) enables collaborative model training across distributed devices while preserving local data privacy, making it ideal for mobile and embedded systems. However, the decentralized nature of FL also opens vulnerabilities…

Machine Learning · Computer Science 2026-05-08 Kichang Lee , Yujin Shin , Jonghyuk Yun , Songkuk Kim , Jun Han , JeongGil Ko

Federated Learning (FL) is a distributed learning paradigm designed to address privacy concerns. However, FL is vulnerable to poisoning attacks, where Byzantine clients compromise the integrity of the global model by submitting malicious…

Cryptography and Security · Computer Science 2025-09-11 Ryan McGaughey , Jesus Martinez del Rincon , Ihsen Alouani

Federated learning (FL) enables collaborative model training across distributed nodes without exposing raw data, but its decentralized nature makes it vulnerable in trust-deficient environments. Inference attacks may recover sensitive…

Machine Learning · Computer Science 2025-11-04 Guanjie Cheng , Mengzhen Yang , Xinkui Zhao , Shuyi Yu , Tianyu Du , Yangyang Wu , Mengying Zhu , Shuiguang Deng

Federated learning (FL) allows multiple devices to train a model collaboratively without sharing their data. Despite its benefits, FL is vulnerable to privacy leakage and poisoning attacks. To address the privacy concern, secure aggregation…

Cryptography and Security · Computer Science 2024-10-29 Peihua Mai , Ran Yan , Yan Pang

Federated Learning (FL) allows multiple clients to collaboratively train a Neural Network (NN) model on their private data without revealing the data. Recently, several targeted poisoning attacks against FL have been introduced. These…

Cryptography and Security · Computer Science 2022-01-04 Phillip Rieger , Thien Duc Nguyen , Markus Miettinen , Ahmad-Reza Sadeghi