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Recently, privacy issues in web services that rely on users' personal data have raised great attention. Unlike existing privacy-preserving technologies such as federated learning and differential privacy, we explore another way to mitigate…

Information Retrieval · Computer Science 2022-10-21 Ziqian Chen , Fei Sun , Yifan Tang , Haokun Chen , Jinyang Gao , Bolin Ding

Federated learning enables the deployment of machine learning to problems for which centralized data collection is impractical. Adding differential privacy guarantees bounds on privacy while data are contributed to a global model. Adding…

Machine Learning · Computer Science 2022-02-22 Andrew Silva , Katherine Metcalf , Nicholas Apostoloff , Barry-John Theobald

In the growing world of artificial intelligence, federated learning is a distributed learning framework enhanced to preserve the privacy of individuals' data. Federated learning lays the groundwork for collaborative research in areas where…

Machine Learning · Computer Science 2023-11-21 Elaheh Jafarigol , Theodore Trafalis , Talayeh Razzaghi , Mona Zamankhani

Recommendation systems typically require centralized user data, limiting user control and raising privacy concerns. Federated learning offers an alternative by keeping data on-device, but its impact on real user behavior remains largely…

Information Retrieval · Computer Science 2026-05-14 Manel Slokom , Alejandro Bellogin

The increasingly stringent regulations on privacy protection have sparked interest in federated learning. As a distributed machine learning framework, it bridges isolated data islands by training a global model over devices while keeping…

Information Retrieval · Computer Science 2022-05-27 Zhitao Zhu , Shijing Si , Jianzong Wang , Jing Xiao

Recommender systems are proving to be an invaluable tool for extracting user-relevant content helping users in their daily activities (e.g., finding relevant places to visit, content to consume, items to purchase). However, to be effective,…

Information Retrieval · Computer Science 2023-05-10 Yacine Belal , Aurélien Bellet , Sonia Ben Mokhtar , Vlad Nitu

Federated Learning is a new subfield of machine learning that allows fitting models without collecting the training data itself. Instead of sharing data, users collaboratively train a model by only sending weight updates to a server. To…

Machine Learning · Computer Science 2019-11-28 Florian Hartmann , Sunah Suh , Arkadiusz Komarzewski , Tim D. Smith , Ilana Segall

Collecting and training over sensitive personal data raise severe privacy concerns in personalized recommendation systems, and federated learning can potentially alleviate the problem by training models over decentralized user data.However,…

Information Retrieval · Computer Science 2022-12-15 Ruixuan Liu , Yanlin Wang , Yang Cao , Lingjuan Lyu , Weike Pan , Yun Chen , Hong Chen

Large Language Models (LLMs) have empowered generative recommendation systems through fine-tuning user behavior data. However, utilizing the user data may pose significant privacy risks, potentially leading to ethical dilemmas and…

Information Retrieval · Computer Science 2025-02-25 Jujia Zhao , Wenjie Wang , Chen Xu , See-Kiong Ng , Tat-Seng Chua

Reinforcement learning methods have been used to optimize long-term user engagement in recommendation systems. However, existing reinforcement learning-based recommendation systems do not fully exploit the relevance of individual user…

Information Retrieval · Computer Science 2025-04-29 Yongxin Deng , Xihe Qiu , Xiaoyu Tan , Yaochu Jin

News recommendation aims to display news articles to users based on their personal interest. Existing news recommendation methods rely on centralized storage of user behavior data for model training, which may lead to privacy concerns and…

Information Retrieval · Computer Science 2020-10-09 Tao Qi , Fangzhao Wu , Chuhan Wu , Yongfeng Huang , Xing Xie

Federated learning becomes a prominent approach when different entities want to learn collaboratively a common model without sharing their training data. However, Federated learning has two main drawbacks. First, it is quite bandwidth…

Cryptography and Security · Computer Science 2021-03-02 Raouf Kerkouche , Gergely Ács , Claude Castelluccia , Pierre Genevès

Federated learning (FL) is a distributed learning paradigm that allows multiple decentralized clients to collaboratively learn a common model without sharing local data. Although local data is not exposed directly, privacy concerns…

Machine Learning · Computer Science 2024-10-02 Tongxin Yin , Xuwei Tan , Xueru Zhang , Mohammad Mahdi Khalili , Mingyan Liu

The Internet-of-Things (IoT) generates vast quantities of data, much of it attributable to individuals' activity and behaviour. Gathering personal data and performing machine learning tasks on this data in a central location presents a…

Machine Learning · Computer Science 2020-09-09 Christopher Briggs , Zhong Fan , Peter Andras

Recently, researchers have successfully employed Graph Neural Networks (GNNs) to build enhanced recommender systems due to their capability to learn patterns from the interaction between involved entities. In addition, previous studies have…

Machine Learning · Computer Science 2023-11-29 Marco Arazzi , Mauro Conti , Antonino Nocera , Stjepan Picek

To protect user privacy and meet law regulations, federated (machine) learning is obtaining vast interests in recent years. The key principle of federated learning is training a machine learning model without needing to know each user's…

Cryptography and Security · Computer Science 2022-04-12 Di Chai , Leye Wang , Kai Chen , Qiang Yang

User-centric recommendation has become essential for delivering personalized services, as it enables systems to adapt to users' evolving behaviors while respecting their long-term preferences and privacy constraints. Although federated…

Information Retrieval · Computer Science 2026-03-19 Chunxu Zhang , Zhiheng Xue , Guodong Long , Weipeng Zhang , Bo Yang

Federated recommendation is a new Internet service architecture that aims to provide privacy-preserving recommendation services in federated settings. Existing solutions are used to combine distributed recommendation algorithms and…

Information Retrieval · Computer Science 2023-05-16 Chunxu Zhang , Guodong Long , Tianyi Zhou , Peng Yan , Zijian Zhang , Chengqi Zhang , Bo Yang

The primary goal of traditional federated learning is to protect data privacy by enabling distributed edge devices to collaboratively train a shared global model while keeping raw data decentralized at local clients. The rise of large…

Machine Learning · Computer Science 2025-08-28 Zhibo Xu , Jianhao Zhu , Jingwen Xu , Changze Lv , Zisu Huang , Xiaohua Wang , Muling Wu , Qi Qian , Xiaoqing Zheng , Xuanjing Huang

Collaborative training of a machine learning model comes with a risk of sharing sensitive or private data. Federated learning offers a way of collectively training a single global model without the need to share client data, by sharing only…

Cryptography and Security · Computer Science 2026-01-09 Damian Harenčák , Lukáš Gajdošech , Martin Madaras