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Privacy concerns in distributed learning often lead clients to return intentionally altered gradient information. We consider the problem of learning convex and $L$-smooth functions under adversarial gradient perturbation, where a client's…

Machine Learning · Computer Science 2026-05-06 Nawapon Sangsiri , Yufei Tao

In spite that Federated Learning (FL) is well known for its privacy protection when training machine learning models among distributed clients collaboratively, recent studies have pointed out that the naive FL is susceptible to gradient…

Cryptography and Security · Computer Science 2021-01-13 Yao Fu , Yipeng Zhou , Di Wu , Shui Yu , Yonggang Wen , Chao Li

This paper investigates the privacy-preserving distributed optimization problem, aiming to protect agents' private information from potential attackers during the optimization process. Gradient tracking, an advanced technique for improving…

Machine Learning · Computer Science 2025-09-24 Furan Xie , Bing Liu , Li Chai

While Federated Learning (FL) mitigates direct data exposure, the resulting trained models remain susceptible to membership inference attacks (MIAs). This paper presents an empirical evaluation of Differential Privacy (DP) as a defense…

Cryptography and Security · Computer Science 2026-04-16 Gustavo de Carvalho Bertoli

Federated Unlearning (FU) has emerged as a critical compliance mechanism for data privacy regulations, requiring unlearned clients to provide verifiable Proof of Federated Unlearning (PoFU) to auditors upon data removal requests. However,…

Cryptography and Security · Computer Science 2025-05-19 Fuyao Zhang , Wenjie Li , Yurong Hao , Xinyu Yan , Yang Cao , Wei Yang Bryan Lim

Data analysis and monitoring on smart grids are jeopardized by attacks on cyber-physical systems. False data injection attack (FDIA) is one of the classes of those attacks that target the smart measurement devices by injecting malicious…

Machine Learning · Computer Science 2023-06-21 Cihat Keçeci , Katherine R. Davis , Erchin Serpedin

Federated learning facilitates the collaborative training of models without the sharing of raw data. However, recent attacks demonstrate that simply maintaining data locality during training processes does not provide sufficient privacy…

Machine Learning · Computer Science 2019-08-16 Stacey Truex , Nathalie Baracaldo , Ali Anwar , Thomas Steinke , Heiko Ludwig , Rui Zhang , Yi Zhou

Recent studies have shown that distributed machine learning is vulnerable to gradient inversion attacks, where private training data can be reconstructed by analyzing the gradients of the models shared in training. Previous attacks…

Machine Learning · Computer Science 2024-10-07 Weijun Li , Qiongkai Xu , Mark Dras

Learning a privacy-preserving model from sensitive data which are distributed across multiple devices is an increasingly important problem. The problem is often formulated in the federated learning context, with the aim of learning a single…

Machine Learning · Computer Science 2023-04-20 Mikko A. Heikkilä , Matthew Ashman , Siddharth Swaroop , Richard E. Turner , Antti Honkela

Federated learning (FL) enables collaborative model training across distributed nodes without exposing raw data, but its decentralized nature makes it vulnerable in trust-deficient environments. Inference attacks may recover sensitive…

Machine Learning · Computer Science 2025-11-04 Guanjie Cheng , Mengzhen Yang , Xinkui Zhao , Shuyi Yu , Tianyu Du , Yangyang Wu , Mengying Zhu , Shuiguang Deng

Membership inference attack (MIA) poses a significant privacy threat in federated learning (FL) as it allows adversaries to determine whether a client's private dataset contains a specific data sample. While defenses against membership…

Machine Learning · Computer Science 2026-02-10 Quan Minh Nguyen , Min-Seon Kim , Hoang M. Ngo , Trong Nghia Hoang , Hyuk-Yoon Kwon , My T. Thai

Federated Learning (FL) has emerged as a potentially powerful privacy-preserving machine learning methodology, since it avoids exchanging data between participants, but instead exchanges model parameters. FL has traditionally been applied…

Cryptography and Security · Computer Science 2022-10-17 Han Wu , Zilong Zhao , Lydia Y. Chen , Aad van Moorsel

With the increased attention and legislation for data-privacy, collaborative machine learning (ML) algorithms are being developed to ensure the protection of private data used for processing. Federated learning (FL) is the most popular of…

Cryptography and Security · Computer Science 2020-04-10 David Enthoven , Zaid Al-Ars

Federated Learning is a privacy preserving decentralized machine learning paradigm designed to collaboratively train models across multiple clients by exchanging gradients to the server and keeping private data local. Nevertheless, recent…

Cryptography and Security · Computer Science 2025-01-07 Isaac Baglin , Xiatian Zhu , Simon Hadfield

Federated learning aims to protect data privacy by collaboratively learning a model without sharing private data among users. However, an adversary may still be able to infer the private training data by attacking the released model.…

Machine Learning · Computer Science 2021-09-13 Zhicong Liang , Bao Wang , Quanquan Gu , Stanley Osher , Yuan Yao

This work focuses on the challenges of non-IID data and stragglers/dropouts in federated learning. We introduce and explore a privacy-flexible paradigm that models parts of the clients' local data as non-private, offering a more versatile…

Machine Learning · Computer Science 2024-04-05 Okko Makkonen , Sampo Niemelä , Camilla Hollanti , Serge Kas Hanna

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) facilitates collaborative model training among distributed clients while ensuring that raw data remains on local devices.Despite this advantage, FL systems are still exposed to risks from malicious or unreliable…

Cryptography and Security · Computer Science 2026-01-30 Deepthy K Bhaskar , Minimol B , Binu V P

This paper considers the scenario that multiple data owners wish to apply a machine learning method over the combined dataset of all owners to obtain the best possible learning output but do not want to share the local datasets owing to…

Machine Learning · Computer Science 2019-07-09 Le Trieu Phong , Tran Thi Phuong

Graph Neural Networks (GNNs) have emerged as powerful models for learning from graph-structured data. However, their widespread adoption has raised serious privacy concerns. While prior research has primarily focused on edge-level privacy,…

Machine Learning · Computer Science 2025-11-12 Jie Fu , Yuan Hong , Zhili Chen , Wendy Hui Wang