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Due to the distributed nature of Federated Learning (FL), researchers have uncovered that FL is vulnerable to backdoor attacks, which aim at injecting a sub-task into the FL without corrupting the performance of the main task. Single-shot…

Artificial Intelligence · Computer Science 2022-07-26 Tian Liu , Xueyang Hu , Tao Shu

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

Federated learning (FL) has been widely deployed to enable machine learning training on sensitive data across distributed devices. However, the decentralized learning paradigm and heterogeneity of FL further extend the attack surface for…

Cryptography and Security · Computer Science 2024-04-16 Haomin Zhuang , Mingxian Yu , Hao Wang , Yang Hua , Jian Li , Xu Yuan

Federated learning (FL) represents a novel paradigm to machine learning, addressing critical issues related to data privacy and security, yet suffering from data insufficiency and imbalance. The emergence of foundation models (FMs) provides…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-11-02 Xi Li , Songhe Wang , Chen Wu , Hao Zhou , Jiaqi Wang

Federated learning enables thousands of participants to construct a deep learning model without sharing their private training data with each other. For example, multiple smartphones can jointly train a next-word predictor for keyboards…

Cryptography and Security · Computer Science 2019-08-07 Eugene Bagdasaryan , Andreas Veit , Yiqing Hua , Deborah Estrin , Vitaly Shmatikov

Federated Learning (FL) is a machine learning (ML) approach that enables multiple decentralized devices or edge servers to collaboratively train a shared model without exchanging raw data. During the training and sharing of model updates…

Cryptography and Security · Computer Science 2024-03-06 Ehsan Nowroozi , Imran Haider , Rahim Taheri , Mauro Conti

Federated learning (FL) has been widely adopted as a decentralized training paradigm that enables multiple clients to collaboratively learn a shared model without exposing their local data. As concerns over data privacy and regulatory…

Cryptography and Security · Computer Science 2025-08-22 Bingguang Lu , Hongsheng Hu , Yuantian Miao , Shaleeza Sohail , Chaoxiang He , Shuo Wang , Xiao Chen

As a distributed machine learning paradigm, Federated Learning (FL) enables large-scale clients to collaboratively train a model without sharing their raw data. However, due to the lack of data auditing for untrusted clients, FL is…

Machine Learning · Computer Science 2025-09-10 Yanxin Yang , Ming Hu , Xiaofei Xie , Yue Cao , Pengyu Zhang , Yihao Huang , Mingsong Chen

Federated Learning (FL) enables decentralized model training while preserving privacy. Recently, the integration of Foundation Models (FMs) into FL has enhanced performance but introduced a novel backdoor attack mechanism. Attackers can…

Machine Learning · Computer Science 2025-05-28 Xiaohuan Bi , Xi Li

Current backdoor attacks against federated learning (FL) strongly rely on universal triggers or semantic patterns, which can be easily detected and filtered by certain defense mechanisms such as norm clipping, comparing parameter…

Machine Learning · Computer Science 2023-10-02 Yanqi Qiao , Dazhuang Liu , Congwen Chen , Rui Wang , Kaitai Liang

Federated Learning (FL) has emerged as a machine learning approach able to preserve the privacy of user's data. Applying FL, clients train machine learning models on a local dataset and a central server aggregates the learned parameters…

Cryptography and Security · Computer Science 2024-09-27 Luiz Leite , Yuri Santo , Bruno L. Dalmazo , André Riker

Federated learning (FL), which aims to facilitate data collaboration across multiple organizations without exposing data privacy, encounters potential security risks. One serious threat is backdoor attacks, where an attacker injects a…

Cryptography and Security · Computer Science 2023-06-21 Yuexin Xuan , Xiaojun Chen , Zhendong Zhao , Bisheng Tang , Ye Dong

The goal of federated learning (FL) is to train one global model by aggregating model parameters updated independently on edge devices without accessing users' private data. However, FL is susceptible to backdoor attacks where a small…

Cryptography and Security · Computer Science 2022-02-24 Yein Kim , Huili Chen , Farinaz Koushanfar

Federated learning allows multiple users to collaboratively train a shared classification model while preserving data privacy. This approach, where model updates are aggregated by a central server, was shown to be vulnerable to poisoning…

Machine Learning · Computer Science 2020-12-17 Chien-Lun Chen , Leana Golubchik , Marco Paolieri

Federated learning (FL) is vulnerable to backdoor attacks, yet most existing methods are limited by fixed-pattern or single-target triggers, making them inflexible and easier to detect. We propose FLAT (FL Arbitrary-Target Attack), a novel…

Machine Learning · Computer Science 2025-08-07 Tuan Nguyen , Khoa D Doan , Kok-Seng Wong

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

Despite the promise of Federated Learning (FL) for privacy-preserving model training on distributed data, it remains susceptible to backdoor attacks. These attacks manipulate models by embedding triggers (specific input patterns) in the…

Cryptography and Security · Computer Science 2024-07-12 Tuan Nguyen , Dung Thuy Nguyen , Khoa D Doan , Kok-Seng Wong

Federated Learning (FL) is a popular paradigm enabling clients to jointly train a global model without sharing raw data. However, FL is known to be vulnerable towards backdoor attacks due to its distributed nature. As participants,…

Cryptography and Security · Computer Science 2025-04-01 Xingyu Lyu , Ning Wang , Yang Xiao , Shixiong Li , Tao Li , Danjue Chen , Yimin Chen

Federated learning (FL) is a distributed machine learning paradigm where enormous scattered clients (e.g. mobile devices or IoT devices) collaboratively train a model under the orchestration of a central server (e.g. service provider),…

Cryptography and Security · Computer Science 2022-01-12 Yongkang Wang , Dihua Zhai , Yufeng Zhan , Yuanqing Xia

Machine Learning models require a vast amount of data for accurate training. In reality, most data is scattered across different organizations and cannot be easily integrated under many legal and practical constraints. Federated Transfer…

Cryptography and Security · Computer Science 2019-10-31 Shreya Sharma , Xing Chaoping , Yang Liu , Yan Kang