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Without direct access to the client's data, federated learning (FL) is well-known for its unique strength in data privacy protection among existing distributed machine learning techniques. However, its distributive and iterative nature…

Machine Learning · Computer Science 2026-04-14 Hanxi Guo , Hao Wang , Tao Song , Tianhang Zheng , Yang Hua , Haibing Guan , Xiangyu Zhang

Federated learning has seen increased adoption in recent years in response to the growing regulatory demand for data privacy. However, the opaque local training process of federated learning also sparks rising concerns about model…

Artificial Intelligence · Computer Science 2023-08-24 Yuxi Mi , Yiheng Sun , Jihong Guan , Shuigeng Zhou

Backdoor attacks involve the injection of a limited quantity of poisoned examples containing triggers into the training dataset. During the inference stage, backdoor attacks can uphold a high level of accuracy for normal examples, yet when…

Cryptography and Security · Computer Science 2024-06-25 Hanfeng Xia , Haibo Hong , Ruili Wang

Federated Learning (FL) is a distributed learning paradigm that enables different parties to train a model together for high quality and strong privacy protection. In this scenario, individual participants may get compromised and perform…

Cryptography and Security · Computer Science 2023-03-01 Kaiyuan Zhang , Guanhong Tao , Qiuling Xu , Siyuan Cheng , Shengwei An , Yingqi Liu , Shiwei Feng , Guangyu Shen , Pin-Yu Chen , Shiqing Ma , Xiangyu Zhang

The advent of Large Language Models (LLMs) has marked significant achievements in language processing and reasoning capabilities. Despite their advancements, LLMs face vulnerabilities to data poisoning attacks, where the adversary inserts…

Machine Learning · Computer Science 2025-05-30 Xiangyu Zhou , Yao Qiang , Saleh Zare Zade , Mohammad Amin Roshani , Prashant Khanduri , Douglas Zytko , Dongxiao Zhu

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 Prompt Learning has emerged as a communication-efficient and privacy-preserving paradigm for adapting large vision-language models like CLIP across decentralized clients. However, the security implications of this setup remain…

Cryptography and Security · Computer Science 2026-01-28 Momin Ahmad Khan , Yasra Chandio , Fatima Muhammad Anwar

Existing research primarily focuses on backdoor attacks and defenses within the generic federated learning scenario, where all clients collaborate to train a single global model. A recent study conducted by Qin et al. (2023) marks the…

Cryptography and Security · Computer Science 2024-04-09 Tiandi Ye , Cen Chen , Yinggui Wang , Xiang Li , Ming Gao

Neural networks are widely known to be vulnerable to backdoor attacks, a method that poisons a portion of the training data to make the target model perform well on normal data sets, while outputting attacker-specified or random categories…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Yong Li , Han Gao

The foundation models (FMs) have been used to generate synthetic public datasets for the heterogeneous federated learning (HFL) problem where each client uses a unique model architecture. However, the vulnerabilities of integrating FMs,…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-12-01 Xi Li , Chen Wu , Jiaqi Wang

Backdoor attacks present a significant threat to the robustness of Federated Learning (FL) due to their stealth and effectiveness. They maintain both the main task of the FL system and the backdoor task simultaneously, causing malicious…

Machine Learning · Computer Science 2024-11-05 Jiahao Xu , Zikai Zhang , Rui Hu

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

It is commonplace to produce application-specific models by fine-tuning large pre-trained models using a small bespoke dataset. The widespread availability of foundation model checkpoints on the web poses considerable risks, including the…

Cryptography and Security · Computer Science 2024-04-02 Yuxin Wen , Leo Marchyok , Sanghyun Hong , Jonas Geiping , Tom Goldstein , Nicholas Carlini

Malicious clients can attack federated learning systems using malicious data, including backdoor samples, during the training phase. The compromised global model will perform well on the validation dataset designed for the task, but a small…

Cryptography and Security · Computer Science 2021-01-18 Chen Wu , Xian Yang , Sencun Zhu , Prasenjit Mitra

Data heterogeneity and backdoor attacks rank among the most significant challenges facing federated learning (FL). For data heterogeneity, personalized federated learning (PFL) enables each client to maintain a private personalized model to…

Machine Learning · Computer Science 2025-01-23 Mingyuan Fan , Zhanyi Hu , Fuyi Wang , Cen Chen

Backdoor data poisoning, inserted within instruction examples used to fine-tune a foundation Large Language Model (LLM) for downstream tasks (\textit{e.g.,} sentiment prediction), is a serious security concern due to the evasive nature of…

Cryptography and Security · Computer Science 2024-08-23 Jayaram Raghuram , George Kesidis , David J. Miller

Due to the greatly improved capabilities of devices, massive data, and increasing concern about data privacy, Federated Learning (FL) has been increasingly considered for applications to wireless communication networks (WCNs). Wireless FL…

Cryptography and Security · Computer Science 2023-12-15 Yichen Wan , Youyang Qu , Wei Ni , Yong Xiang , Longxiang Gao , Ekram Hossain

Federated learning (FL) is an emerging paradigm for distributed training of large-scale deep neural networks in which participants' data remains on their own devices with only model updates being shared with a central server. However, the…

Machine Learning · Computer Science 2020-08-13 Vale Tolpegin , Stacey Truex , Mehmet Emre Gursoy , Ling Liu

Federated learning allows multiple participants to collaboratively train a central model without sharing their private data. However, this distributed nature also exposes new attack surfaces. In particular, backdoor attacks allow attackers…

Machine Learning · Computer Science 2025-09-24 Zhaoxin Wang , Handing Wang , Cong Tian , Yaochu Jin

Deep learning models are well known to be susceptible to backdoor attack, where the attacker only needs to provide a tampered dataset on which the triggers are injected. Models trained on the dataset will passively implant the backdoor, and…

Cryptography and Security · Computer Science 2024-06-21 Zonghao Ying , Bin Wu