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In this paper, we propose a robust aggregation method for federated learning (FL) that can effectively tackle malicious Byzantine attacks. At each user, model parameter is firstly updated by multiple steps, which is adjustable over…

Machine Learning · Computer Science 2023-08-22 Shiyuan Zuo , Rongfei Fan , Han Hu , Ning Zhang , Shimin Gong

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

In Byzantine robust distributed or federated learning, a central server wants to train a machine learning model over data distributed across multiple workers. However, a fraction of these workers may deviate from the prescribed algorithm…

Machine Learning · Computer Science 2023-11-23 Sai Praneeth Karimireddy , Lie He , Martin Jaggi

Federated learning (FL) is an emerging distributed learning paradigm without sharing participating clients' private data. However, existing works show that FL is vulnerable to both Byzantine (security) attacks and data reconstruction…

Cryptography and Security · Computer Science 2024-07-30 Chenfei Nie , Qiang Li , Yuxin Yang , Yuede Ji , Binghui Wang

Federated machine learning which enables resource constrained node devices (e.g., mobile phones and IoT devices) to learn a shared model while keeping the training data local, can provide privacy, security and economic benefits by designing…

Cryptography and Security · Computer Science 2020-04-22 Gan Sun , Yang Cong , Jiahua Dong , Qiang Wang , Ji Liu

Federated learning allows multiple clients to collaboratively train a global model with the assistance of a server. However, its distributed nature makes it susceptible to poisoning attacks, where malicious clients can compromise the global…

Cryptography and Security · Computer Science 2025-01-30 Wenbin Wang , Qiwen Ma , Zifan Zhang , Yuchen Liu , Zhuqing Liu , Minghong Fang

Federated learning is a novel framework that enables resource-constrained edge devices to jointly learn a model, which solves the problem of data protection and data islands. However, standard federated learning is vulnerable to Byzantine…

Machine Learning · Computer Science 2021-09-07 Kun Zhai , Qiang Ren , Junli Wang , Chungang Yan

To study the resilience of distributed learning, the "Byzantine" literature considers a strong threat model where workers can report arbitrary gradients to the parameter server. Whereas this model helped obtain several fundamental results,…

Machine Learning · Computer Science 2022-07-22 Sadegh Farhadkhani , Rachid Guerraoui , Lê-Nguyên Hoang , Oscar Villemaud

Federated Learning (FL) enables training of a global model from distributed data, while preserving data privacy. However, the singular-model based operation of FL is open with uploading poisoned models compatible with the global model…

Machine Learning · Computer Science 2024-09-13 Somayeh Kianpisheh , Chafika Benzaid , Tarik Taleb

The success of machine learning (ML) has been intimately linked with the availability of large amounts of data, typically collected from heterogeneous sources and processed on vast networks of computing devices (also called {\em workers}).…

Machine Learning · Computer Science 2024-05-02 Sadegh Farhadkhani , Rachid Guerraoui , Nirupam Gupta , Rafael Pinot

Federated learning (FL) facilitates distributed training across different IoT and edge devices, safeguarding the privacy of their data. The inherent distributed structure of FL introduces vulnerabilities, especially from adversarial devices…

Cryptography and Security · Computer Science 2023-11-13 Shenghui Li , Edith Ngai , Fanghua Ye , Li Ju , Tianru Zhang , Thiemo Voigt

This paper investigates the robustness of over-the-air federated learning to Byzantine attacks. The simple averaging of the model updates via over-the-air computation makes the learning task vulnerable to random or intended modifications of…

Machine Learning · Computer Science 2022-06-24 Houssem Sifaou , Geoffrey Ye Li

Federated Learning (FL) is a distributed machine learning paradigm where data is distributed among clients who collaboratively train a model in a computation process coordinated by a central server. By assigning a weight to each client…

Machine Learning · Computer Science 2021-05-19 Amit Portnoy , Yoav Tirosh , Danny Hendler

We study a recently proposed large-scale distributed learning paradigm, namely Federated Learning, where the worker machines are end users' own devices. Statistical and computational challenges arise in Federated Learning particularly in…

Machine Learning · Computer Science 2019-10-11 Avishek Ghosh , Justin Hong , Dong Yin , Kannan Ramchandran

Model poisoning attacks pose a significant security threat to Federated Learning (FL). Most existing model poisoning attacks rely on collusion, requiring adversarial clients to coordinate by exchanging local benign models and synchronizing…

Cryptography and Security · Computer Science 2026-04-13 Israt Jahan Mouri , Muhammad Ridowan , Muhammad Abdullah Adnan

Federated learning is a popular strategy for training models on distributed, sensitive data, while preserving data privacy. Prior work identified a range of security threats on federated learning protocols that poison the data or the model.…

Cryptography and Security · Computer Science 2022-08-30 Giorgio Severi , Matthew Jagielski , Gökberk Yar , Yuxuan Wang , Alina Oprea , Cristina Nita-Rotaru

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) algorithms using Knowledge Distillation (KD) have received increasing attention due to their favorable properties with respect to privacy, non-i.i.d. data and communication cost. These methods depart from…

Machine Learning · Computer Science 2025-03-18 Christophe Roux , Max Zimmer , Sebastian Pokutta

Decentralized Learning (DL) is a peer--to--peer learning approach that allows a group of users to jointly train a machine learning model. To ensure correctness, DL should be robust, i.e., Byzantine users must not be able to tamper with the…

Machine Learning · Computer Science 2023-03-08 Mathilde Raynal , Dario Pasquini , Carmela Troncoso

Existing model poisoning attacks to federated learning assume that an attacker has access to a large fraction of compromised genuine clients. However, such assumption is not realistic in production federated learning systems that involve…

Cryptography and Security · Computer Science 2022-05-09 Xiaoyu Cao , Neil Zhenqiang Gong