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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 (FL) facilitates decentralized machine learning model training, preserving data privacy, lowering communication costs, and boosting model performance through diversified data sources. Yet, FL faces vulnerabilities such as…

Machine Learning · Computer Science 2023-09-11 Torsten Krauß , Alexandra Dmitrienko

Federated Learning(FL), in theory, preserves privacy of individual clients' data while producing quality machine learning models. However, attacks such as Deep Leakage from Gradients(DLG) severely question the practicality of FL. In this…

Machine Learning · Computer Science 2024-08-19 Joon Kim , Sejin Park

Data poisoning is one of the most relevant security threats against machine learning and data-driven technologies. Since many applications rely on untrusted training data, an attacker can easily craft malicious samples and inject them into…

Cryptography and Security · Computer Science 2021-12-01 Nicolas M. Müller , Simon Roschmann , Konstantin Böttinger

This paper proposes a novel, data-agnostic, model poisoning attack on Federated Learning (FL), by designing a new adversarial graph autoencoder (GAE)-based framework. The attack requires no knowledge of FL training data and achieves both…

Machine Learning · Computer Science 2023-12-01 Kai Li , Jingjing Zheng , Xin Yuan , Wei Ni , Ozgur B. Akan , H. Vincent Poor

With the emergence of privacy leaks in federated learning, secure aggregation protocols that mainly adopt either homomorphic encryption or threshold secret sharing have been widely developed for federated learning to protect the privacy of…

Cryptography and Security · Computer Science 2024-06-03 Xue Yang , Zifeng Liu , Xiaohu Tang , Rongxing Lu , Bo Liu

Federated learning has been proposed as a privacy-preserving machine learning framework that enables multiple clients to collaborate without sharing raw data. However, client privacy protection is not guaranteed by design in this framework.…

Cryptography and Security · Computer Science 2022-10-17 Kai Yue , Richeng Jin , Chau-Wai Wong , Dror Baron , Huaiyu Dai

Due to its distributed methodology alongside its privacy-preserving features, Federated Learning (FL) is vulnerable to training time adversarial attacks. In this study, our focus is on backdoor attacks in which the adversary's goal is to…

Machine Learning · Computer Science 2021-02-11 Omid Aramoon , Pin-Yu Chen , Gang Qu , Yuan Tian

Federated learning (FL) is a feasible technique to learn personalized recommendation models from decentralized user data. Unfortunately, federated recommender systems are vulnerable to poisoning attacks by malicious clients. Existing…

Information Retrieval · Computer Science 2022-02-11 Chuhan Wu , Fangzhao Wu , Tao Qi , Yongfeng Huang , Xing Xie

This review paper takes a comprehensive look at malicious attacks against FL, categorizing them from new perspectives on attack origins and targets, and providing insights into their methodology and impact. In this survey, we focus on…

Machine Learning · Computer Science 2024-01-10 Xianghua Xie , Chen Hu , Hanchi Ren , Jingjing Deng

Graph condensation (GC) has gained significant attention for its ability to synthesize smaller yet informative graphs. However, existing studies often overlook the robustness of GC in scenarios where the original graph is corrupted. In such…

Machine Learning · Computer Science 2025-11-25 Jiayi Luo , Qingyun Sun , Beining Yang , Haonan Yuan , Xingcheng Fu , Yanbiao Ma , Jianxin Li , Philip S. Yu

Federated learning (FL) is inherently susceptible to privacy breaches and poisoning attacks. To tackle these challenges, researchers have separately devised secure aggregation mechanisms to protect data privacy and robust aggregation…

Cryptography and Security · Computer Science 2025-02-11 Runhua Xu , Shiqi Gao , Chao Li , James Joshi , Jianxin Li

Machine Learning models are vulnerable to adversarial attacks that rely on perturbing the input data. This work proposes a novel strategy using Autoencoder Deep Neural Networks to defend a machine learning model against two gradient-based…

Machine Learning · Computer Science 2018-12-10 Rajeev Sahay , Rehana Mahfuz , Aly El Gamal

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) enables multiple clients to train a model without compromising sensitive data. The decentralized nature of FL makes it susceptible to adversarial attacks, especially backdoor insertion during training. Recently, the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Thuy Dung Nguyen , Anh Duy Nguyen , Kok-Seng Wong , Huy Hieu Pham , Thanh Hung Nguyen , Phi Le Nguyen , Truong Thao Nguyen

Clustering models constitute a class of unsupervised machine learning methods which are used in a number of application pipelines, and play a vital role in modern data science. With recent advancements in deep learning -- deep clustering…

Machine Learning · Computer Science 2022-10-06 Anshuman Chhabra , Ashwin Sekhari , Prasant Mohapatra

Federated learning often suffers from slow and unstable convergence due to the heterogeneous characteristics of participating client datasets. Such a tendency is aggravated when the client participation ratio is low since the information…

Machine Learning · Computer Science 2024-04-02 Geeho Kim , Jinkyu Kim , Bohyung Han

Federated Learning (FL) enables decentralized model training without sharing raw data. However, it remains vulnerable to Byzantine attacks, which can compromise the aggregation of locally updated parameters at the central server.…

Machine Learning · Computer Science 2025-09-30 Shiyuan Zuo , Rongfei Fan , Cheng Zhan , Jie Xu , Puning Zhao , Han Hu

Federated Learning (FL) is a widespread and well-adopted paradigm of decentralised learning that allows training one model from multiple sources without the need to transfer data between participating clients directly. Since its inception…

Machine Learning · Computer Science 2025-09-03 Maciej Krzysztof Zuziak , Roberto Pellungrini , Salvatore Rinzivillo

Federated learning is an established method for training machine learning models without sharing training data. However, recent work has shown that it cannot guarantee data privacy as shared gradients can still leak sensitive information.…

Machine Learning · Computer Science 2022-03-18 Mislav Balunović , Dimitar I. Dimitrov , Robin Staab , Martin Vechev