Federated recommendation (FedRec) preserves user privacy by enabling decentralized training of personalized models, but this architecture is inherently vulnerable to adversarial attacks. Significant research has been conducted on targeted attacks in FedRec systems, motivated by commercial and social influence considerations. However, much of this work has largely overlooked the differential robustness of recommendation models. Moreover, our empirical findings indicate that existing targeted attack methods achieve only limited effectiveness in Federated Sequential Recommendation (FSR) tasks. Driven by these observations, we focus on investigating targeted attacks in FSR and propose a novel dualview attack framework, named DV-FSR. This attack method uniquely combines a sampling-based explicit strategy with a contrastive learning-based implicit gradient strategy to orchestrate a coordinated attack. Additionally, we introduce a specific defense mechanism tailored for targeted attacks in FSR, aiming to evaluate the mitigation effects of the attack method we proposed. Extensive experiments validate the effectiveness of our proposed approach on representative sequential models.
Joint SDU-NTU Centre for Artificial Intelligence Research (C-FAIR)（山东大学-南洋理工大学人工智能国际联合研究院（C-FAIR））；Software School, Shandong University（山东大学软件学院）；Shandong University（山东大学）；Sino-Singapore International Joint Research Institute（中新国际联合研究院）；Alibaba-NTU Singapore Joint Research Institute（阿里巴巴-新加坡南洋理工大学联合研究学院）；Nanyang Technological University（南洋理工大学）；Microsoft Research Asia（微软亚洲研究院）
FedPOIRec: Privacy Preserving Federated POI Recommendation with Social Influence
Institute for Language and Speech Processing, Athena Research Center（雅典娜研究中心语言与语音处理研究所）；Department of Electrical and Computer Engineering, Democritus University of Thrace（色雷斯德谟克利特大学电气与计算机工程系）
A Scenario-Oriented Survey of Federated Recommender Systems: Techniques, Challenges, and Future Directions
School of Software Engineering, Xi’an Jiaotong University（西安交通大学软件工程学院）；City, University of London（伦敦城市大学）；Ministry of Education Key Laboratory for Intelligent Networks and Network Security, the School of Information and Communication Engineering, and SMILES LAB, Xi’an Jiaotong University（教育部智能网络与网络 security key laboratory、信息与通信工程学院及SMILES实验室，西安交通大学）
