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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

Federated Learning (FL) enables numerous participants to train deep learning models collaboratively without exposing their personal, potentially sensitive data, making it a promising solution for data privacy in collaborative training. The…

Cryptography and Security · Computer Science 2022-06-02 Manaar Alam , Esha Sarkar , Michail Maniatakos

Federated learning (FL) enables privacy-preserving collaborative model training but remains vulnerable to adversarial behaviors that compromise model utility or fairness across sensitive groups. While extensive studies have examined attacks…

Machine Learning · Computer Science 2025-11-13 Yanli Li , Yanan Zhou , Zhongliang Guo , Nan Yang , Yuning Zhang , Huaming Chen , Dong Yuan , Weiping Ding , Witold Pedrycz

Federated Learning (FL) has emerged as a leading paradigm for privacy-preserving distributed machine learning, yet the distributed nature of FL introduces unique security challenges, notably the threat of backdoor attacks. Existing backdoor…

Cryptography and Security · Computer Science 2025-06-27 Chengcheng Zhu , Ye Li , Bosen Rao , Jiale Zhang , Yunlong Mao , Sheng Zhong

Deep learning (DL) methods have been widely applied to anomaly-based network intrusion detection system (NIDS) to detect malicious traffic. To expand the usage scenarios of DL-based methods, federated learning (FL) allows multiple users to…

Cryptography and Security · Computer Science 2023-08-03 Jiahui Chen , Yi Zhao , Qi Li , Xuewei Feng , Ke Xu

Federated learning (FL) remains highly vulnerable to adaptive backdoor attacks that preserve stealth by closely imitating benign update statistics. Existing defenses predominantly rely on anomaly detection in parameter or gradient space,…

Machine Learning · Computer Science 2026-02-13 Chibueze Peace Obioma , Youcheng Sun , Mustafa A. Mustafa

Federated learning (FL), as a powerful learning paradigm, trains a shared model by aggregating model updates from distributed clients. However, the decoupling of model learning from local data makes FL highly vulnerable to backdoor attacks,…

Cryptography and Security · Computer Science 2025-03-07 Xiyue Zhang , Xiaoyong Xue , Xiaoning Du , Xiaofei Xie , Yang Liu , Meng Sun

Federated Learning (FL) enables collaborative model training while preserving data privacy, but it is highly vulnerable to backdoor attacks. Most existing defense methods in FL have limited effectiveness due to their neglect of the model's…

Cryptography and Security · Computer Science 2025-08-05 Xinhai Yan , Libing Wu , Zhuangzhuang Zhang , Bingyi Liu , Lijuan Huo , Jing Wang

Backdoor defenses have been studied to alleviate the threat of deep neural networks (DNNs) being backdoor attacked and thus maliciously altered. Since DNNs usually adopt some external training data from an untrusted third party, a robust…

Computer Vision and Pattern Recognition · Computer Science 2023-03-24 Kuofeng Gao , Yang Bai , Jindong Gu , Yong Yang , Shu-Tao Xia

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

Federated Learning (FL) is a novel framework of decentralized machine learning. Due to the decentralized feature of FL, it is vulnerable to adversarial attacks in the training procedure, e.g. , backdoor attacks. A backdoor attack aims to…

Machine Learning · Computer Science 2022-08-15 Yifan Wang , Wei Fan , Keke Yang , Naji Alhusaini , Jing Li

Federated learning (FL) is a distributed machine learning paradigm that enables training models on decentralized data. The field of FL security against poisoning attacks is plagued with confusion due to the proliferation of research that…

Machine Learning · Computer Science 2024-03-12 Hamid Mozaffari , Sunav Choudhary , Amir Houmansadr

Deep Learning-based image synthesis techniques have been applied in healthcare research for generating medical images to support open research. Training generative adversarial neural networks (GAN) usually requires large amounts of training…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Ruinan Jin , Xiaoxiao Li

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) enables distributed model training across edge devices while preserving data locality. This decentralized approach has emerged as a promising solution for collaborative learning on sensitive user data, effectively…

Cryptography and Security · Computer Science 2026-02-18 Mohammad Hadi Foroughi , Seyed Hamed Rastegar , Mohammad Sabokrou , Ahmad Khonsari

We investigate a specific security risk in FL: a group of malicious clients has impacted the model during training by disguising their identities and acting as benign clients but later switching to an adversarial role. They use their data,…

Machine Learning · Computer Science 2024-11-22 Yijiang Li , Ying Gao , Haohan Wang

The introduction of robust optimisation has pushed the state-of-the-art in defending against adversarial attacks. Notably, the state-of-the-art projected gradient descent (PGD)-based training method has been shown to be universally and…

Computer Vision and Pattern Recognition · Computer Science 2023-01-12 Ezekiel Soremekun , Sakshi Udeshi , Sudipta Chattopadhyay

Federated learning (FL) naturally faces the problem of data heterogeneity in real-world scenarios, but this is often overlooked by studies on FL security and privacy. On the one hand, the effectiveness of backdoor attacks on FL may drop…

Machine Learning · Computer Science 2023-06-16 Haochen Mei , Gaolei Li , Jun Wu , Longfei Zheng

Existing approaches defend against backdoor attacks in federated learning (FL) mainly through a) mitigating the impact of infected models, or b) excluding infected models. The former negatively impacts model accuracy, while the latter…

Machine Learning · Computer Science 2024-05-21 Zhen Qin , Feiyi Chen , Chen Zhi , Xueqiang Yan , Shuiguang Deng

Owing to the low communication costs and privacy-promoting capabilities, Federated Learning (FL) has become a promising tool for training effective machine learning models among distributed clients. However, with the distributed…

Machine Learning · Computer Science 2021-08-03 Chuan Ma , Jun Li , Ming Ding , Kang Wei , Wen Chen , H. Vincent Poor