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Federated learning enables learning from decentralized data sources without compromising privacy, which makes it a crucial technique. However, it is vulnerable to model poisoning attacks, where malicious clients interfere with the training…

Cryptography and Security · Computer Science 2023-07-19 Sungwon Park , Sungwon Han , Fangzhao Wu , Sundong Kim , Bin Zhu , Xing Xie , Meeyoung Cha

Federated learning is a distributed framework designed to address privacy concerns. However, it introduces new attack surfaces, which are especially prone when data is non-Independently and Identically Distributed. Existing approaches fail…

Cryptography and Security · Computer Science 2025-05-27 Hyejun Jeong , Hamin Son , Seohu Lee , Jayun Hyun , Tai-Myoung Chung

Recent works have shown that Federated Learning (FL) is vulnerable to backdoor attacks. Existing defenses cluster submitted updates from clients and select the best cluster for aggregation. However, they often rely on unrealistic…

Machine Learning · Computer Science 2024-10-16 Hassan Ali , Surya Nepal , Salil S. Kanhere , Sanjay Jha

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

Federated learning (FL) systems allow decentralized data-owning clients to jointly train a global model through uploading their locally trained updates to a centralized server. The property of decentralization enables adversaries to craft…

Cryptography and Security · Computer Science 2025-04-23 Yanbo Dai , Songze Li , Zihan Gan , Xueluan Gong

The decentralized and privacy-preserving nature of federated learning (FL) makes it vulnerable to backdoor attacks aiming to manipulate the behavior of the resulting model on specific adversary-chosen inputs. However, most existing defenses…

Cryptography and Security · Computer Science 2023-08-11 Siquan Huang , Yijiang Li , Chong Chen , Leyu Shi , Ying Gao

Traditional distributed backdoor attacks (DBA) in federated learning improve stealthiness by decomposing global triggers into sub-triggers, which however requires more poisoned data to maintian the attck strength and hence increases the…

Cryptography and Security · Computer Science 2025-11-13 Jian Wang , Hong Shen , Chan-Tong Lam

Federated Learning (FL) is a distributed paradigm aimed at protecting participant data privacy by exchanging model parameters to achieve high-quality model training. However, this distributed nature also makes FL highly vulnerable to…

Cryptography and Security · Computer Science 2025-09-26 Wei Wan , Yuxuan Ning , Zhicong Huang , Cheng Hong , Shengshan Hu , Ziqi Zhou , Yechao Zhang , Tianqing Zhu , Wanlei Zhou , Leo Yu Zhang

Federated Learning (FL) provides decentralised model training, which effectively tackles problems such as distributed data and privacy preservation. However, the generalisation of global models frequently faces challenges from data…

Machine Learning · Computer Science 2025-09-05 Ozgu Goksu , Nicolas Pugeault

In a federated learning (FL) system, decentralized data owners (clients) could upload their locally trained models to a central server, to jointly train a global model. Malicious clients may plant backdoors into the global model through…

Cryptography and Security · Computer Science 2024-06-03 Songze Li , Yanbo Dai

Federated learning (FL) has been demonstrated to be susceptible to backdoor attacks. However, existing academic studies on FL backdoor attacks rely on a high proportion of real clients with main task-related data, which is impractical. In…

Cryptography and Security · Computer Science 2024-05-07 Minghui Li , Wei Wan , Yuxuan Ning , Shengshan Hu , Lulu Xue , Leo Yu Zhang , Yichen Wang

Fast identification of new network attack patterns is crucial for improving network security. Nevertheless, identifying an ongoing attack in a heterogeneous network is a non-trivial task. Federated learning emerges as a solution to…

Cryptography and Security · Computer Science 2022-05-25 Helio N. Cunha Neto , Ivana Dusparic , Diogo M. F. Mattos , Natalia C. Fernandes

Federated learning has created a decentralized method to train a machine learning model without needing direct access to client data. The main goal of a federated learning architecture is to protect the privacy of each client while still…

Cryptography and Security · Computer Science 2023-12-11 Marc Vucovich , Devin Quinn , Kevin Choi , Christopher Redino , Abdul Rahman , Edward Bowen

In the last years, Federated learning (FL) has become a popular solution to train machine learning models in domains with high privacy concerns. However, FL scalability and performance face significant challenges in real-world deployments…

Machine Learning · Computer Science 2026-03-11 Davide Domini , Gianluca Aguzzi , Lukas Esterle , Mirko Viroli

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 is a versatile framework for training models in decentralized environments. However, the trust placed in clients makes federated learning vulnerable to backdoor attacks launched by malicious participants. While many…

Cryptography and Security · Computer Science 2024-12-23 Borja Molina-Coronado

Federated Learning (FL) is a machine learning paradigm that safeguards privacy by retaining client data on edge devices. However, optimizing FL in practice can be challenging due to the diverse and heterogeneous nature of the learning…

Machine Learning · Computer Science 2024-06-11 Yongxin Guo , Xiaoying Tang , Tao Lin

Federated learning (FL) has shown success in collaboratively training a model among decentralized data resources without directly sharing privacy-sensitive training data. Despite recent advances, non-IID (non-independent and identically…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Cheng-Chang Tsai , Kai-Wen Cheng , Chun-Shien Lu

Federated Learning (FL) is an emerging distributed machine learning paradigm enabling multiple clients to train a global model collaboratively without sharing their raw data. While FL enhances data privacy by design, it remains vulnerable…

Federated Learning (FL) facilitates collaborative learning among multiple clients in a distributed manner and ensures the security of privacy. However, its performance inevitably degrades with non-Independent and Identically Distributed…

Machine Learning · Computer Science 2024-12-09 Yunlu Yan , Huazhu Fu , Yuexiang Li , Jinheng Xie , Jun Ma , Guang Yang , Lei Zhu
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