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Submodular maximization is an optimization problem benefiting many machine learning applications, where we seek a small subset best representing an extremely large dataset. We focus on the federated setting where the data are locally owned…

Machine Learning · Computer Science 2025-11-11 Duc A. Tran , Dung Truong , Duy Le

Recommender systems are gaining increasing and critical impacts on human and society since a growing number of users use them for information seeking and decision making. Therefore, it is crucial to address the potential unfairness problems…

Information Retrieval · Computer Science 2021-11-08 Yunqi Li , Hanxiong Chen , Shuyuan Xu , Yingqiang Ge , Yongfeng Zhang

Nowadays there are more and more items available online, this makes it hard for users to find items that they like. Recommender systems aim to find the item who best suits the user, using his historical interactions. Depending on the…

Information Retrieval · Computer Science 2023-04-19 Theo Nommay

Federated learning (FL) can achieve privacy-safe and reliable collaborative training without collecting users' private data. Its excellent privacy security potential promotes a wide range of FL applications in Internet-of-Things (IoT),…

Machine Learning · Computer Science 2023-09-26 Xiaofeng Liu , Qing Wang , Yunfeng Shao , Yinchuan Li

Personalized Federated Learning (PFL) aims to train customized models for clients with highly heterogeneous data distributions while preserving data privacy. Existing approaches often rely on heuristics like clustering or model…

Artificial Intelligence · Computer Science 2026-03-13 Ping Guo , Tiantian Zhang , Xi Lin , Xiang Li , Zhi-Ri Tang , Qingfu Zhang

Points of interest (POI) recommendation has been drawn much attention recently due to the increasing popularity of location-based networks, e.g., Foursquare and Yelp. Among the existing approaches to POI recommendation, Matrix Factorization…

Machine Learning · Computer Science 2020-03-13 Chaochao Chen , Ziqi Liu , Peilin Zhao , Jun Zhou , Xiaolong Li

Federated recommendation is a prominent use case within federated learning, yet it remains susceptible to various attacks, from user to server-side vulnerabilities. Poisoning attacks are particularly notable among user-side attacks, as…

Cryptography and Security · Computer Science 2024-02-20 Ming Yin , Yichang Xu , Minghong Fang , Neil Zhenqiang Gong

Federated Learning (FL) enables collaborative training of models across distributed clients without sharing local data, addressing privacy concerns in decentralized systems. However, the gradient-sharing process exposes private data to…

Machine Learning · Computer Science 2025-03-11 Mingcong Xu , Xiaojin Zhang , Wei Chen , Hai Jin

Vertical federated learning (VFL) allows an active party with labeled feature to leverage auxiliary features from the passive parties to improve model performance. Concerns about the private feature and label leakage in both the training…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-02-01 Hanlin Gu , Jiahuan Luo , Yan Kang , Lixin Fan , Qiang Yang

Federated recommendations (FRs) provide personalized services while preserving user privacy by keeping user data on local clients, which has attracted significant attention in recent years. However, due to the strict privacy constraints…

Information Retrieval · Computer Science 2026-01-01 Kang Fu , Honglei Zhang , Xuechao Zou , Yidong Li

The emerging paradigm of federated learning strives to enable collaborative training of machine learning models on the network edge without centrally aggregating raw data and hence, improving data privacy. This sharply deviates from…

Machine Learning · Computer Science 2019-12-03 Manoj Ghuhan Arivazhagan , Vinay Aggarwal , Aaditya Kumar Singh , Sunav Choudhary

Cross-domain recommendation (CDR) aims to address the data-sparsity problem by transferring knowledge across domains. Existing CDR methods generally assume that the user-item interaction data is shareable between domains, which leads to…

Information Retrieval · Computer Science 2024-08-28 Li Wang , Shoujin Wang , Quangui Zhang , Qiang Wu , Min Xu

Federated learning enables machine learning models to learn from private decentralized data without compromising privacy. The standard formulation of federated learning produces one shared model for all clients. Statistical heterogeneity…

Machine Learning · Computer Science 2020-03-20 Viraj Kulkarni , Milind Kulkarni , Aniruddha Pant

Prompt learning is a crucial technique for adapting pre-trained multimodal language models (MLLMs) to user tasks. Federated prompt personalization (FPP) is further developed to address data heterogeneity and local overfitting, however, it…

Cryptography and Security · Computer Science 2025-05-29 Sizai Hou , Songze Li , Baturalp Buyukates

Federated learning is renowned for its efficacy in distributed model training, ensuring that users, called clients, retain data privacy by not disclosing their data to the central server that orchestrates collaborations. Most previous work…

Machine Learning · Computer Science 2024-10-30 Pouya M. Ghari , Yanning Shen

We study continual mean estimation, where data vectors arrive sequentially and the goal is to maintain accurate estimates of the running mean. We address this problem under user-level differential privacy, which protects each user's entire…

Machine Learning · Computer Science 2026-05-12 Nikita P. Kalinin , Ali Najar , Valentin Roth , Christoph H. Lampert

Federated Learning (FL) is a distributed learning paradigm that enables mutually untrusting clients to collaboratively train a common machine learning model. Client data privacy is paramount in FL. At the same time, the model must be…

Machine Learning · Computer Science 2022-08-18 Hamid Mozaffari , Virendra J. Marathe , Dave Dice

Personalized recommendations form an important part of today's internet ecosystem, helping artists and creators to reach interested users, and helping users to discover new and engaging content. However, many users today are skeptical of…

Cryptography and Security · Computer Science 2024-01-09 Allegra Laro , Yanqing Chen , Hao He , Babak Aghazadeh

Traditional Federated Learning (FL) methods typically train a single global model collaboratively without exchanging raw data. In contrast, Personalized Federated Learning (PFL) techniques aim to create multiple models that are better…

Machine Learning · Computer Science 2024-04-23 Emilio Cantu-Cervini

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