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Federated learning (FL) enables a collaborative environment for training machine learning models without sharing training data between users. This is typically achieved by aggregating model gradients on a central server. Decentralized…

Machine Learning · Computer Science 2024-07-09 Siddhartha Bhattacharya , Daniel Helo , Joshua Siegel

Federated Learning (FL) emerges as a distributed machine learning approach that addresses privacy concerns by training AI models locally on devices. Decentralized Federated Learning (DFL) extends the FL paradigm by eliminating the central…

Machine Learning · Computer Science 2025-11-17 Diego Cajaraville-Aboy , Ana Fernández-Vilas , Rebeca P. Díaz-Redondo , Manuel Fernández-Veiga

Federated learning (FL) is a trending training paradigm to utilize decentralized training data. FL allows clients to update model parameters locally for several epochs, then share them to a global model for aggregation. This training…

Machine Learning · Computer Science 2022-08-09 Xiaoxiao Li , Zhao Song , Jiaming Yang

Federated Learning (FL) has become a powerful technique for training Machine Learning (ML) models in a decentralized manner, preserving the privacy of the training datasets involved. However, the decentralized nature of FL limits the…

Machine Learning · Computer Science 2025-08-27 Enrique Mármol Campos , Aurora González Vidal , José Luis Hernández Ramos , Antonio Skarmeta

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 collaborative model training while preserving data privacy. However, it remains vulnerable to malicious clients who compromise model integrity through Byzantine attacks, data poisoning, or adaptive…

Machine Learning · Computer Science 2026-05-13 Abolfazl Younesi , Leon Kiss , Zahra Najafabadi Samani , Juan Aznar Poveda , Thomas Fahringer

Given sufficient data from multiple edge devices, federated learning (FL) enables training a shared model without transmitting private data to the central server. However, FL is generally vulnerable to Byzantine attacks from compromised…

Machine Learning · Computer Science 2025-09-18 Youngjoon Lee , Jinu Gong , Joonhyuk Kang

Federated Learning (FL) is a distributed machine learning paradigm facilitating participants to collaboratively train a model without revealing their local data. However, when FL is deployed into the wild, some intelligent clients can…

Machine Learning · Computer Science 2025-10-03 Andrea Augello , Ashish Gupta , Giuseppe Lo Re , Sajal K. Das

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

Byzantine-robust Federated Learning (FL) aims to counter malicious clients and train an accurate global model while maintaining an extremely low attack success rate. Most existing systems, however, are only robust when most of the clients…

Cryptography and Security · Computer Science 2023-11-17 Rui Wang , Xingkai Wang , Huanhuan Chen , Jérémie Decouchant , Stjepan Picek , Nikolaos Laoutaris , Kaitai Liang

Federated Learning (FL) enables collaborative machine learning across decentralized data sources without sharing raw data. It offers a promising approach to privacy-preserving AI. However, FL remains vulnerable to adversarial threats from…

Machine Learning · Computer Science 2025-06-05 Kun Yang , Neena Imam

Federated learning is a prominent framework that enables clients (e.g., mobile devices or organizations) to train a collaboratively global model under a central server's orchestration while keeping local training datasets' privacy. However,…

Machine Learning · Computer Science 2021-07-20 Farnaz Tahmasebian , Jian Lou , Li Xiong

Byzantine attacks during model aggregation in Federated Learning (FL) threaten training integrity by manipulating malicious clients' updates. Existing methods struggle with limited robustness under high malicious client ratios and…

Cryptography and Security · Computer Science 2025-05-20 Yanhua Wen , Lu Ai , Gang Liu , Chuang Li , Jianhao Wei

Federated learning systems are susceptible to adversarial attacks. To combat this, we introduce a novel aggregator based on Huber loss minimization, and provide a comprehensive theoretical analysis. Under independent and identically…

Machine Learning · Computer Science 2024-03-26 Puning Zhao , Fei Yu , Zhiguo Wan

In Federated Learning (FL), the distributed nature and heterogeneity of client data present both opportunities and challenges. While collaboration among clients can significantly enhance the learning process, not all collaborations are…

Machine Learning · Computer Science 2024-07-18 Nazarii Tupitsa , Samuel Horváth , Martin Takáč , Eduard Gorbunov

Federated Learning (FL) offers collaborative model training without data sharing but is vulnerable to backdoor attacks, where poisoned model weights lead to compromised system integrity. Existing countermeasures, primarily based on anomaly…

Cryptography and Security · Computer Science 2023-12-11 Hao Yu , Chuan Ma , Meng Liu , Tianyu Du , Ming Ding , Tao Xiang , Shouling Ji , Xinwang Liu

The increasing popularity of the federated learning (FL) framework due to its success in a wide range of collaborative learning tasks also induces certain security concerns. Among many vulnerabilities, the risk of Byzantine attacks is of…

Machine Learning · Computer Science 2024-01-02 Kerem Ozfatura , Emre Ozfatura , Alptekin Kupcu , Deniz Gunduz

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 is a versatile framework for training models in decentralized environments. However, the trust placed in clients makes federated learning vulnerable to backdoor attacks launched by malicious participants. While many…

Cryptography and Security · Computer Science 2024-12-23 Borja Molina-Coronado

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