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Privacy-preserving federated learning enables a population of distributed clients to jointly learn a shared model while keeping client training data private, even from an untrusted server. Prior works do not provide efficient solutions that…

Cryptography and Security · Computer Science 2022-02-22 David Byrd , Vaikkunth Mugunthan , Antigoni Polychroniadou , Tucker Hybinette Balch

Secure aggregation is commonly used in federated learning (FL) to alleviate privacy concerns related to the central aggregator seeing all parameter updates in the clear. Unfortunately, most existing secure aggregation schemes ignore two…

Federated learning (FL) allows a large number of clients to collaboratively train machine learning (ML) models by sending only their local gradients to a central server for aggregation in each training iteration, without sending their raw…

Cryptography and Security · Computer Science 2023-05-23 Fucai Luo , Saif Al-Kuwari , Haiyan Wang , Xingfu Yan

Federated learning is an emerging data-private distributed learning framework, which, however, is vulnerable to adversarial attacks. Although several heuristic defenses are proposed to enhance the robustness of federated learning, they do…

Machine Learning · Computer Science 2024-03-05 Cheng Chen , Bhavya Kailkhura , Ryan Goldhahn , Yi Zhou

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 an essential distributed model training technique. However, threats such as gradient inversion attacks and poisoning attacks pose significant risks to the privacy of training data and the model correctness. We propose…

Cryptography and Security · Computer Science 2025-02-24 Zhihui Zhao , Xiaorong Dong , Yimo Ren , Jianhua Wang , Dan Yu , Hongsong Zhu , Yongle Chen

Federated Learning (FL) enables multiple users to collaboratively train a machine learning model without sharing raw data, making it suitable for privacy-sensitive applications. However, local model or weight updates can still leak…

Federated Learning (FL) enables collaborative model training across multiple clients without sharing private data. We consider FL scenarios wherein FL clients are subject to adversarial (Byzantine) attacks, while the FL server is trusted…

Machine Learning · Computer Science 2026-04-30 Emmanouil Kritharakis , Dusan Jakovetic , Antonios Makris , Konstantinos Tserpes

We propose FedGT, a novel framework for identifying malicious clients in federated learning with secure aggregation. Inspired by group testing, the framework leverages overlapping groups of clients to identify the presence of malicious…

Machine Learning · Computer Science 2024-07-11 Marvin Xhemrishi , Johan Östman , Antonia Wachter-Zeh , Alexandre Graell i Amat

This paper studies a challenging robust federated learning task with model heterogeneous and data corrupted clients, where the clients have different local model structures. Data corruption is unavoidable due to factors such as random…

Machine Learning · Computer Science 2025-03-13 Xiuwen Fang , Mang Ye , Bo Du

Federated Learning (FL) offers collaborative model training without data sharing but is vulnerable to backdoor attacks, where poisoned model weights lead to compromised system integrity. Existing countermeasures, primarily based on anomaly…

Cryptography and Security · Computer Science 2023-12-11 Hao Yu , Chuan Ma , Meng Liu , Tianyu Du , Ming Ding , Tao Xiang , Shouling Ji , Xinwang Liu

Federated learning (FL) is well-suited to 5G networks, where many mobile devices generate sensitive edge data. Secure aggregation protocols enhance privacy in FL by ensuring that individual user updates reveal no information about the…

Cryptography and Security · Computer Science 2025-05-13 Yiwei Zhang , Rouzbeh Behnia , Imtiaz Karim , Attila A. Yavuz , Elisa Bertino

Federated learning is a distributed framework for training machine learning models over the data residing at mobile devices, while protecting the privacy of individual users. A major bottleneck in scaling federated learning to a large…

Machine Learning · Computer Science 2021-02-23 Jinhyun So , Basak Guler , A. Salman Avestimehr

Recent advances in differentially private federated learning (DPFL) algorithms have found that using correlated noise across the rounds of federated learning (DP-FTRL) yields provably and empirically better accuracy than using independent…

Cryptography and Security · Computer Science 2024-10-16 Marshall Ball , James Bell-Clark , Adria Gascon , Peter Kairouz , Sewoong Oh , Zhiye Xie

This paper explores the use of server learning for enhancing the robustness of federated learning against malicious attacks even when clients' training data are not independent and identically distributed. We propose a heuristic algorithm…

Machine Learning · Computer Science 2026-04-06 Van Sy Mai , Kushal Chakrabarti , Richard J. La , Dipankar Maity

Federated learning is a decentralized machine learning framework that enables collaborative model training without revealing raw data. Due to the diverse hardware and software limitations, a client may not always be available for the…

Machine Learning · Computer Science 2024-02-21 Lili Su , Ming Xiang , Jiaming Xu , Pengkun Yang

Federated learning (FL) is a popular distributed learning paradigm in machine learning, which enables multiple clients to collaboratively train models under the guidance of a server without exposing private client data. However, FL's…

Machine Learning · Computer Science 2026-05-01 Zehui Tang , Yuchen Liu , Feihu Huang

Federated Learning has rapidly expanded from its original inception to now have a large body of research, several frameworks, and sold in a variety of commercial offerings. Thus, its security and robustness is of significant importance.…

Cryptography and Security · Computer Science 2025-10-02 Simone Bottoni , Giulio Zizzo , Stefano Braghin , Alberto Trombetta

In this paper, we investigate the transmission latency of the secure aggregation problem in a \emph{wireless} federated learning system with multiple curious servers. We propose a privacy-preserving coded aggregation scheme where the…

Information Theory · Computer Science 2025-07-01 Zhenhao Huang , Kai Liang , Yuanming Shi , Songze Li , Youlong Wu

Federated learning (FL) enables multiple clients to collaboratively train a global machine learning model via a server without sharing their private training data. In traditional FL, the system follows a synchronous approach, where the…

Cryptography and Security · Computer Science 2026-04-07 Anjun Gao , Feng Wang , Zhenglin Wan , Yueyang Quan , Zhuqing Liu , Minghong Fang