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Graphs are the dominant formalism for modeling multi-agent systems. The algebraic connectivity of a graph is particularly important because it provides the convergence rates of consensus algorithms that underlie many multi-agent control and…

Cryptography and Security · Computer Science 2021-04-02 Bo Chen , Calvin Hawkins , Kasra Yazdani , Matthew Hale

Graph neural networks (GNNs) have demonstrated remarkable performance in various graph-based machine learning tasks by effectively modeling high-order interactions between nodes. However, training GNNs without protection may leak sensitive…

Machine Learning · Computer Science 2026-02-10 Wen Xu , Zhetao Li , Yong Xiao , Pengpeng Qiao , Mianxiong Dong , Kaoru Ota

Graph data are ubiquitous in the real world. Graph learning (GL) tries to mine and analyze graph data so that valuable information can be discovered. Existing GL methods are designed for centralized scenarios. However, in practical…

Machine Learning · Computer Science 2021-05-10 Chuan Chen , Weibo Hu , Ziyue Xu , Zibin Zheng

Graph Neural Networks (GNNs) training often necessitates gathering raw user data on a central server, which raises significant privacy concerns. Federated learning emerges as a solution, enabling collaborative model training without users…

Machine Learning · Computer Science 2024-10-01 Zhidong Gao , Yuanxiong Guo , Yanmin Gong

Conventional graph neural networks (GNNs) are often confronted with fairness issues that may stem from their input, including node attributes and neighbors surrounding a node. While several recent approaches have been proposed to eliminate…

Machine Learning · Computer Science 2023-02-21 Zemin Liu , Trung-Kien Nguyen , Yuan Fang

Deep Neural Networks (DNNs) have achieved remarkable progress in various real-world applications, especially when abundant training data are provided. However, data isolation has become a serious problem currently. Existing works build…

Machine Learning · Computer Science 2022-02-22 Jun Zhou , Longfei Zheng , Chaochao Chen , Yan Wang , Xiaolin Zheng , Bingzhe Wu , Cen Chen , Li Wang , Jianwei Yin

To develop effective and efficient graph similarity learning (GSL) models, a series of data-driven neural algorithms have been proposed in recent years. Although GSL models are frequently deployed in privacy-sensitive scenarios, the user…

Machine Learning · Computer Science 2022-10-24 Yupeng Hou , Wayne Xin Zhao , Yaliang Li , Ji-Rong Wen

Anonymous social networks present a number of new and challenging problems for existing Social Network Analysis techniques. Traditionally, existing methods for analysing graph structure, such as community detection, required global…

Data Structures and Algorithms · Computer Science 2021-06-22 Alvaro Garcia-Recuero

In this paper, we present a stealthy and effective attack that exposes privacy vulnerabilities in Graph Neural Networks (GNNs) by inferring private links within graph-structured data. Focusing on the inductive setting where new nodes join…

Cryptography and Security · Computer Science 2023-07-26 Oualid Zari , Javier Parra-Arnau , Ayşe Ünsal , Melek Önen

Motivated by growing concerns over ensuring privacy on social networks, we develop new algorithms and impossibility results for fitting complex statistical models to network data subject to rigorous privacy guarantees. We consider the…

Statistics Theory · Mathematics 2018-10-05 Christian Borgs , Jennifer Chayes , Adam Smith , Ilias Zadik

Graph Neural Networks (GNNs) have become indispensable tools for learning from graph structured data, catering to various applications such as social network analysis and fraud detection for financial services. At the heart of these…

Cryptography and Security · Computer Science 2025-06-02 Zeyu Song , Ehsanul Kabir , Shagufta Mehnaz

Currently, the federated graph neural network (GNN) has attracted a lot of attention due to its wide applications in reality without violating the privacy regulations. Among all the privacy-preserving technologies, the differential privacy…

Cryptography and Security · Computer Science 2022-06-09 Yeqing Qiu , Chenyu Huang , Jianzong Wang , Zhangcheng Huang , Jing Xiao

Driven by the outstanding performance of neural networks in the structured Euclidean domain, recent years have seen a surge of interest in developing neural networks for graphs and data supported on graphs. The graph is leveraged at each…

Machine Learning · Computer Science 2021-07-28 Elvin Isufi , Fernando Gama , Alejandro Ribeiro

Decentralized learning is appealing as it enables the scalable usage of large amounts of distributed data and resources (without resorting to any central entity), while promoting privacy since every user minimizes the direct exposure of…

Machine Learning · Computer Science 2024-05-06 Youssef Allouah , Anastasia Koloskova , Aymane El Firdoussi , Martin Jaggi , Rachid Guerraoui

Distributed online learning has been proven extremely effective in solving large-scale machine learning problems over streaming data. However, information sharing between learners in distributed learning also raises concerns about the…

Machine Learning · Computer Science 2023-10-31 Ziqin Chen , Yongqiang Wang

Federated learning involves a central processor that works with multiple agents to find a global model. The process consists of repeatedly exchanging estimates, which results in the diffusion of information pertaining to the local private…

Machine Learning · Computer Science 2021-04-28 Elsa Rizk , Ali H. Sayed

Graph neural networks (GNNs) emerge as a powerful family of representation learning models on graphs. To derive node representations, they utilize a global model that recursively aggregates information from the neighboring nodes. However,…

Machine Learning · Computer Science 2021-11-04 Zemin Liu , Yuan Fang , Chenghao Liu , Steven C. H. Hoi

Graph Neural Networks (GNNs) have made rapid developments in the recent years. Due to their great ability in modeling graph-structured data, GNNs are vastly used in various applications, including high-stakes scenarios such as financial…

Machine Learning · Computer Science 2024-11-26 Enyan Dai , Tianxiang Zhao , Huaisheng Zhu , Junjie Xu , Zhimeng Guo , Hui Liu , Jiliang Tang , Suhang Wang

Node classification on graphs is a significant task with a wide range of applications, including social analysis and anomaly detection. Even though graph neural networks (GNNs) have produced promising results on this task, current…

Machine Learning · Computer Science 2023-06-16 Jingyang Yuan , Xiao Luo , Yifang Qin , Yusheng Zhao , Wei Ju , Ming Zhang

Graph Neural Networks (GNNs) have experienced rapid advancements in recent years due to their ability to learn meaningful representations from graph data structures. However, in most real-world settings, such as financial transaction…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-30 Pranjal Naman , Yogesh Simmhan