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Federated learning is a promising collaborative and privacy-preserving machine learning approach in data-rich smart cities. Nevertheless, the inherent heterogeneity of these urban environments presents a significant challenge in selecting…

Computer Science and Game Theory · Computer Science 2024-05-02 Osama Wehbi , Sarhad Arisdakessian , Mohsen Guizani , Omar Abdel Wahab , Azzam Mourad , Hadi Otrok , Hoda Al khzaimi , Bassem Ouni

Federated recommender system (FRS), which enables many local devices to train a shared model jointly without transmitting local raw data, has become a prevalent recommendation paradigm with privacy-preserving advantages. However, previous…

Information Retrieval · Computer Science 2022-12-27 Honglei Zhang , Fangyuan Luo , Jun Wu , Xiangnan He , Yidong Li

Federated recommender systems (FedRecs) have gained significant attention for their potential to protect user's privacy by keeping user privacy data locally and only communicating model parameters/gradients to the server. Nevertheless, the…

Information Retrieval · Computer Science 2024-02-01 Liang Qu , Wei Yuan , Ruiqi Zheng , Lizhen Cui , Yuhui Shi , Hongzhi Yin

Federated learning has been proposed as a privacy-preserving machine learning framework that enables multiple clients to collaborate without sharing raw data. However, client privacy protection is not guaranteed by design in this framework.…

Cryptography and Security · Computer Science 2022-10-17 Kai Yue , Richeng Jin , Chau-Wai Wong , Dror Baron , Huaiyu Dai

Conversational Recommender Systems (CRSs) have become increasingly popular as a powerful tool for providing personalized recommendation experiences. By directly engaging with users in a conversational manner to learn their current and…

Information Retrieval · Computer Science 2025-03-04 Allen Lin , Jianling Wang , Ziwei Zhu , James Caverlee

Federated learning (FL) enables distributed optimization of machine learning models while protecting privacy by independently training local models on each client and then aggregating parameters on a central server, thereby producing an…

Machine Learning · Computer Science 2022-03-08 Chencheng Xu , Zhiwei Hong , Minlie Huang , Tao Jiang

Federated learning, i.e., a mobile edge computing framework for deep learning, is a recent advance in privacy-preserving machine learning, where the model is trained in a decentralized manner by the clients, i.e., data curators, preventing…

Machine Learning · Computer Science 2018-12-06 Zhibo Wang , Mengkai Song , Zhifei Zhang , Yang Song , Qian Wang , Hairong Qi

The conventional machine learning (ML) and deep learning approaches need to share customers' sensitive information with an external credit bureau to generate a prediction model that opens the door to privacy leakage. This leakage risk makes…

Machine Learning · Computer Science 2023-03-16 Tao Liu , Zhi Wang , Hui He , Wei Shi , Liangliang Lin , Wei Shi , Ran An , Chenhao Li

Privacy in federated learning is crucial, encompassing two key aspects: safeguarding the privacy of clients' data and maintaining the privacy of the federator's objective from the clients. While the first aspect has been extensively…

Cryptography and Security · Computer Science 2025-05-01 Maximilian Egger , Rüdiger Urbanke , Rawad Bitar

Federated Learning faces significant challenges in statistical and system heterogeneity, along with high energy consumption, necessitating efficient client selection strategies. Traditional approaches, including heuristic and learning-based…

Machine Learning · Computer Science 2025-10-01 Zhiyuan Ning , Chunlin Tian , Meng Xiao , Wei Fan , Pengyang Wang , Li Li , Pengfei Wang , Yuanchun Zhou

Federated learning (FL) is a recently developed area of machine learning, in which the private data of a large number of distributed clients is used to develop a global model under the coordination of a central server without explicitly…

Machine Learning · Computer Science 2022-07-21 Amit Kumar Kundu , Joseph Jaja

Federated learning (FL) is an important technique for learning models from decentralized data in a privacy-preserving way. Existing FL methods usually uniformly sample clients for local model learning in each round. However, different…

Machine Learning · Computer Science 2023-06-27 Tao Qi , Fangzhao Wu , Lingjuan Lyu , Yongfeng Huang , Xing Xie

Federated Learning (FL) is a promising distributed learning mechanism which still faces two major challenges, namely privacy breaches and system efficiency. In this work, we reconceptualize the FL system from the perspective of network…

Machine Learning · Computer Science 2024-01-10 Yuchen Shi , Zheqi Zhu , Pingyi Fan , Khaled B. Letaief , Chenghui Peng

In federated learning (FL), a set of participants share updates computed on their local data with an aggregator server that combines updates into a global model. However, reconciling accuracy with privacy and security is a challenge to FL.…

Cryptography and Security · Computer Science 2022-11-22 Najeeb Moharram Jebreel , Josep Domingo-Ferrer , Alberto Blanco-Justicia , David Sanchez

Learning accurate users and news representations is critical for news recommendation. Despite great progress, existing methods seem to have a strong bias towards content representation or just capture collaborative filtering relationship.…

Information Retrieval · Computer Science 2021-10-26 Yong Gao , Huifeng Guo , Dandan Lin , Yingxue Zhang , Ruiming Tang , Xiuqiang He

Federated learning (FL) enables leveraging distributed private data for model training in a privacy-preserving way. However, data heterogeneity significantly limits the performance of current FL methods. In this paper, we propose a novel FL…

Machine Learning · Computer Science 2023-12-12 Rui Ye , Xinyu Zhu , Jingyi Chai , Siheng Chen , Yanfeng Wang

The increasing data privacy concerns in recommendation systems have made federated recommendations (FedRecs) attract more and more attention. Existing FedRecs mainly focus on how to effectively and securely learn personal interests and…

Information Retrieval · Computer Science 2022-12-06 Wei Yuan , Hongzhi Yin , Fangzhao Wu , Shijie Zhang , Tieke He , Hao Wang

In the era of big data, leveraging information from multiple clients while preserving data privacy has emerged as a critical challenge in modern statistical modeling and forecasting. This paper introduces a privacy-preserving federated…

Methodology · Statistics 2026-04-09 Kejun Chen , Qianqian Zhu

Federated recommendation aims to collect global knowledge by aggregating local models from massive devices, to provide recommendations while ensuring privacy. Current methods mainly leverage aggregation functions invented by federated…

Cryptography and Security · Computer Science 2024-06-07 Honglei Zhang , Haoxuan Li , Jundong Chen , Sen Cui , Kunda Yan , Abudukelimu Wuerkaixi , Xin Zhou , Zhiqi Shen , Yidong Li

Federated Learning (FL) is gaining prominence in machine learning as privacy concerns grow. This paradigm allows each client (e.g., an individual online store) to train a recommendation model locally while sharing only model updates,…

Machine Learning · Computer Science 2025-10-09 Jongwon Park , Minku Kang , Wooseok Sim , Soyoung Lee , Hogun Park