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The majority of work in privacy-preserving federated learning (FL) has been focusing on horizontally partitioned datasets where clients share the same sets of features and can train complete models independently. However, in many…

Machine Learning · Computer Science 2023-05-22 Xinchi Qiu , Heng Pan , Wanru Zhao , Chenyang Ma , Pedro Porto Buarque de Gusmão , Nicholas D. Lane

With the emergence of privacy leaks in federated learning, secure aggregation protocols that mainly adopt either homomorphic encryption or threshold secret sharing have been widely developed for federated learning to protect the privacy of…

Cryptography and Security · Computer Science 2024-06-03 Xue Yang , Zifeng Liu , Xiaohu Tang , Rongxing Lu , Bo Liu

There are situations where data relevant to machine learning problems are distributed across multiple locations that cannot share the data due to regulatory, competitiveness, or privacy reasons. Machine learning approaches that require data…

Machine Learning · Computer Science 2022-06-28 Dimitris Stripelis , Jose Luis Ambite

Secure aggregation is concerned with the task of securely uploading the inputs of multiple users to an aggregation server without letting the server know the inputs beyond their summation. It finds broad applications in distributed machine…

Information Theory · Computer Science 2026-01-16 Xiang Zhang , Kai Wan , Hua Sun , Shiqiang Wang , Mingyue Ji , Giuseppe Caire

Federated learning (FL) is a distributed machine learning paradigm enabling multiple clients to train a model collaboratively without exposing their local data. Among FL schemes, clustering is an effective technique addressing the…

Cryptography and Security · Computer Science 2025-04-01 Yunan Wei , Shengnan Zhao , Chuan Zhao , Zhe Liu , Zhenxiang Chen , Minghao Zhao

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

Wearable devices can offer services to individuals and the public. However, wearable data collected by cloud providers may pose privacy risks. To reduce these risks while maintaining full functionality, healthcare systems require solutions…

Cryptography and Security · Computer Science 2024-03-20 Khlood Jastaniah , Ning Zhang , Mustafa A. Mustafa

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) 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

In federated learning (FL), a machine learning model is trained on multiple nodes in a decentralized manner, while keeping the data local and not shared with other nodes. However, FL requires the nodes to also send information on the model…

Machine Learning · Computer Science 2021-10-08 Mohammad Aghapour , Aidin Ferdowsi , Walid Saad

Federated learning (FL) enables collaborative model training across decentralized datasets. NVIDIA FLARE's Federated XGBoost extends the popular XGBoost algorithm to both vertical and horizontal federated settings, facilitating joint model…

Cryptography and Security · Computer Science 2025-04-08 Ziyue Xu , Yuan-Ting Hsieh , Zhihong Zhang , Holger R. Roth , Chester Chen , Yan Cheng , Andrew Feng

Federated learning (FL) is gaining increasing attention as an emerging collaborative machine learning approach, particularly in the context of large-scale computing and data systems. However, the fundamental algorithm of FL, Federated…

Cryptography and Security · Computer Science 2025-05-20 Jianyi Zhang , Ziyin Zhou , Yilong Li , Qichao Jin

Federated learning (FL) is a type of distributed machine learning at the wireless edge that preserves the privacy of clients' data from adversaries and even the central server. Existing federated learning approaches either use (i) secure…

Information Theory · Computer Science 2022-11-01 Mitra Hassani , Reza Gholizadeh

Federated Learning (FL) has emerged as a key paradigm for building Trustworthy AI systems by enabling privacy-preserving, decentralized model training. However, FL is highly susceptible to adversarial attacks that compromise model integrity…

Cryptography and Security · Computer Science 2026-02-26 Mario García-Márquez , Nuria Rodríguez-Barroso , M. Victoria Luzón , Francisco Herrera

Online federated learning (FL) enables geographically distributed devices to learn a global shared model from locally available streaming data. Most online FL literature considers a best-case scenario regarding the participating clients and…

Machine Learning · Computer Science 2023-10-31 Francois Gauthier , Vinay Chakravarthi Gogineni , Stefan Werner , Yih-Fang Huang , Anthony Kuh

Federated learning (FL) enables multiple clients to collaboratively train models without sharing their local data, and becomes an important privacy-preserving machine learning framework. However, classical FL faces serious security and…

Cryptography and Security · Computer Science 2023-07-27 Jingwei Yi , Fangzhao Wu , Huishuai Zhang , Bin Zhu , Tao Qi , Guangzhong Sun , Xing Xie

Federated learning is a privacy-focused approach towards machine learning where models are trained on client devices with locally available data and aggregated at a central server. However, the dependence on a single central server is…

Machine Learning · Computer Science 2026-01-06 Shamik Bhattacharyya , Rachel Kalpana Kalaimani

For model privacy, local model parameters in federated learning shall be obfuscated before sent to the remote aggregator. This technique is referred to as \emph{secure aggregation}. However, secure aggregation makes model poisoning attacks…

Cryptography and Security · Computer Science 2024-04-26 Zhuosheng Zhang , Jiarui Li , Shucheng Yu , Christian Makaya

Federated Learning (FL) enables collaborative model training without centralizing client data, making it attractive for privacy-sensitive domains. While existing approaches employ cryptographic techniques such as homomorphic encryption,…

Cryptography and Security · Computer Science 2026-02-09 Sahar Ghoflsaz Ghinani , Elaheh Sadredini

Federated Learning and Analytics (FLA) have seen widespread adoption by technology platforms for processing sensitive on-device data. However, basic FLA systems have privacy limitations: they do not necessarily require anonymization…