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While Federated learning (FL) is attractive for pulling privacy-preserving distributed training data, the credibility of participating clients and non-inspectable data pose new security threats, of which poisoning attacks are particularly…

Cryptography and Security · Computer Science 2023-09-20 Zizhen Liu , Weiyang He , Chip-Hong Chang , Jing Ye , Huawei Li , Xiaowei Li

Federated learning has recently been applied to recommendation systems to protect user privacy. In federated learning settings, recommendation systems can train recommendation models only collecting the intermediate parameters instead of…

Information Retrieval · Computer Science 2023-03-10 Zehua Sun , Yonghui Xu , Yong Liu , Wei He , Lanju Kong , Fangzhao Wu , Yali Jiang , Lizhen Cui

Model poisoning attacks pose a significant security threat to Federated Learning (FL). Most existing model poisoning attacks rely on collusion, requiring adversarial clients to coordinate by exchanging local benign models and synchronizing…

Cryptography and Security · Computer Science 2026-04-13 Israt Jahan Mouri , Muhammad Ridowan , Muhammad Abdullah Adnan

Federated learning allows multiple users to collaboratively train a shared classification model while preserving data privacy. This approach, where model updates are aggregated by a central server, was shown to be vulnerable to poisoning…

Machine Learning · Computer Science 2020-12-17 Chien-Lun Chen , Leana Golubchik , Marco Paolieri

Federated Learning (FL) is a promising distributed learning approach that enables multiple clients to collaboratively train a shared global model. However, recent studies show that FL is vulnerable to various poisoning attacks, which can…

Cryptography and Security · Computer Science 2023-10-23 Xinyu Zhang , Qingyu Liu , Zhongjie Ba , Yuan Hong , Tianhang Zheng , Feng Lin , Li Lu , Kui Ren

Federated learning (FL) is vulnerable to poisoning attacks, where adversaries corrupt the global aggregation results and cause denial-of-service (DoS). Unlike recent model poisoning attacks that optimize the amplitude of malicious…

Machine Learning · Computer Science 2024-09-27 Hangtao Zhang , Zeming Yao , Leo Yu Zhang , Shengshan Hu , Chao Chen , Alan Liew , Zhetao Li

Federated learning is a decentralized machine learning approach where clients train models locally and share model updates to develop a global model. This enables low-resource devices to collaboratively build a high-quality model without…

Cryptography and Security · Computer Science 2024-12-10 Li Bai , Haibo Hu , Qingqing Ye , Haoyang Li , Leixia Wang , Jianliang Xu

Without direct access to the client's data, federated learning (FL) is well-known for its unique strength in data privacy protection among existing distributed machine learning techniques. However, its distributive and iterative nature…

Machine Learning · Computer Science 2026-04-14 Hanxi Guo , Hao Wang , Tao Song , Tianhang Zheng , Yang Hua , Haibing Guan , Xiangyu Zhang

Federated learning (FL) is vulnerable to poisoning attacks, where malicious clients upload manipulated updates to degrade the performance of the global model. Although detection methods can identify and remove malicious clients, the model…

Machine Learning · Computer Science 2026-05-05 Wenwei Zhao , Xiaowen Li , Yao Liu , Zhuo Lu

Federated learning is a distributed framework designed to address privacy concerns. However, it introduces new attack surfaces, which are especially prone when data is non-Independently and Identically Distributed. Existing approaches fail…

Cryptography and Security · Computer Science 2025-05-27 Hyejun Jeong , Hamin Son , Seohu Lee , Jayun Hyun , Tai-Myoung Chung

Federated learning is vulnerable to poisoning attacks by malicious adversaries. Existing methods often involve high costs to achieve effective attacks. To address this challenge, we propose a sybil-based virtual data poisoning attack, where…

Cryptography and Security · Computer Science 2025-05-16 Changxun Zhu , Qilong Wu , Lingjuan Lyu , Shibei Xue

This demo paper examines the susceptibility of Federated Learning (FL) systems to targeted data poisoning attacks, presenting a novel system for visualizing and mitigating such threats. We simulate targeted data poisoning attacks via label…

Cryptography and Security · Computer Science 2024-05-28 Xueqing Zhang , Junkai Zhang , Ka-Ho Chow , Juntao Chen , Ying Mao , Mohamed Rahouti , Xiang Li , Yuchen Liu , Wenqi Wei

This paper studies the poisoning attack and defense interactions in a federated learning (FL) system, specifically in the context of wireless signal classification using deep learning for next-generation (NextG) communications. FL…

Networking and Internet Architecture · Computer Science 2023-12-29 Yalin E. Sagduyu , Tugba Erpek , Yi Shi

Recommender systems can be privacy-sensitive. To protect users' private historical interactions, federated learning has been proposed in distributed learning for user representations. Using federated recommender (FedRec) systems, users can…

Information Retrieval · Computer Science 2023-12-29 Qi Hu , Yangqiu Song

Federated recommendation (FedRec) can train personalized recommenders without collecting user data, but the decentralized nature makes it susceptible to poisoning attacks. Most previous studies focus on the targeted attack to promote…

Information Retrieval · Computer Science 2022-12-13 Yang Yu , Qi Liu , Likang Wu , Runlong Yu , Sanshi Lei Yu , Zaixi Zhang

Federated Learning (FL) is a collaborative learning paradigm enabling participants to collectively train a shared machine learning model while preserving the privacy of their sensitive data. Nevertheless, the inherent decentralized and…

Cryptography and Security · Computer Science 2024-04-08 K Naveen Kumar , C Krishna Mohan , Aravind Machiry

Federated learning (FL) is a machine learning (ML) approach that allows the use of distributed data without compromising personal privacy. However, the heterogeneous distribution of data among clients in FL can make it difficult for the…

Machine Learning · Computer Science 2023-03-07 Thuy Dung Nguyen , Tuan Nguyen , Phi Le Nguyen , Hieu H. Pham , Khoa Doan , Kok-Seng Wong

News Recommendation System(NRS) has become a fundamental technology to many online news services. Meanwhile, several studies show that recommendation systems(RS) are vulnerable to data poisoning attacks, and the attackers have the ability…

Cryptography and Security · Computer Science 2022-03-11 Xudong Zhang , Zan Wang , Jingke Zhao , Lanjun Wang

Federated learning combines local updates from clients to produce a global model, which is susceptible to poisoning attacks. Most previous defense strategies relied on vectors derived from projections of local updates on a Euclidean space;…

Machine Learning · Computer Science 2024-04-19 Sungwon Han , Hyeonho Song , Sungwon Park , Meeyoung Cha

Federated sequential recommendation distributes model training across user devices so that behavioural data remains local, reducing privacy risks. Yet, this setting introduces two intertwined difficulties. On the one hand, individual…

Information Retrieval · Computer Science 2026-03-02 Minh Hieu Nguyen