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Fine-tuning large language models (LLMs) with local data is a widely adopted approach for organizations seeking to adapt LLMs to their specific domains. Given the shared characteristics in data across different organizations, the idea of…

Machine Learning · Computer Science 2025-09-26 Wenkai Guo , Xuefeng Liu , Haolin Wang , Jianwei Niu , Shaojie Tang , Jing Yuan

Federated learning (FL) is a heavily promoted approach for training ML models on sensitive data, e.g., text typed by users on their smartphones. FL is expressly designed for training on data that are unbalanced and non-iid across the…

Machine Learning · Computer Science 2022-03-07 Tao Yu , Eugene Bagdasaryan , Vitaly Shmatikov

Federated learning (FL) is a promising technique for learning-based functions in wireless networks, thanks to its distributed implementation capability. On the other hand, distributed learning may increase the risk of exposure to malicious…

Machine Learning · Computer Science 2025-04-28 Han Zhang , Hao Zhou , Medhat Elsayed , Majid Bavand , Raimundas Gaigalas , Yigit Ozcan , Melike Erol-Kantarci

Federated learning (FL) is an efficient approach for large-scale distributed machine learning that promises data privacy by keeping training data on client devices. However, recent research has uncovered vulnerabilities in FL, impacting…

Machine Learning · Computer Science 2025-10-15 Felix Marx , Thomas Schneider , Ajith Suresh , Tobias Wehrle , Christian Weinert , Hossein Yalame

We investigate a specific security risk in FL: a group of malicious clients has impacted the model during training by disguising their identities and acting as benign clients but later switching to an adversarial role. They use their data,…

Machine Learning · Computer Science 2024-11-22 Yijiang Li , Ying Gao , Haohan Wang

As in-the-wild data are increasingly involved in the training stage, machine learning applications become more susceptible to data poisoning attacks. Such attacks typically lead to test-time accuracy degradation or controlled misprediction.…

Cryptography and Security · Computer Science 2022-11-02 Yufei Chen , Chao Shen , Yun Shen , Cong Wang , Yang Zhang

Federated learning (FL) is vulnerable to model poisoning attacks, in which malicious clients corrupt the global model via sending manipulated model updates to the server. Existing defenses mainly rely on Byzantine-robust FL methods, which…

Cryptography and Security · Computer Science 2022-10-25 Zaixi Zhang , Xiaoyu Cao , Jinyuan Jia , Neil Zhenqiang Gong

Federated Learning systems are increasingly subjected to a multitude of model poisoning attacks from clients. Among these, edge-case attacks that target a small fraction of the input space are nearly impossible to detect using existing…

Machine Learning · Computer Science 2024-08-15 Kiran Purohit , Soumi Das , Sourangshu Bhattacharya , Santu Rana

Federated Learning (FL) has been recently proposed as an emerging paradigm to build machine learning models using distributed training datasets that are locally stored and maintained on different devices in 5G networks while providing…

Cryptography and Security · Computer Science 2020-07-30 Yi Liu , Jialiang Peng , Jiawen Kang , Abdullah M. Iliyasu , Dusit Niyato , Ahmed A. Abd El-Latif

An attack on deep learning systems where intelligent machines collaborate to solve problems could cause a node in the network to make a mistake on a critical judgment. At the same time, the security and privacy concerns of AI have…

Machine Learning · Computer Science 2021-08-03 Yuwei Sun , Ng Chong , Hideya Ochiai

Federated Learning (FL) is a novel client-server distributed learning framework that can protect data privacy. However, recent works show that FL is vulnerable to poisoning attacks. Many defenses with robust aggregators (AGRs) are proposed…

Cryptography and Security · Computer Science 2024-07-26 Yuxin Yang , Qiang Li , Chenfei Nie , Yuan Hong , Meng Pang , Binghui Wang

Data poisoning attacks, in which a malicious adversary aims to influence a model by injecting "poisoned" data into the training process, have attracted significant recent attention. In this work, we take a closer look at existing poisoning…

Machine Learning · Computer Science 2024-02-16 Yiwei Lu , Gautam Kamath , Yaoliang Yu

Federated learning (FL) is an emerging collaborative learning paradigm that aims to protect data privacy. Unfortunately, recent works show FL algorithms are vulnerable to the serious data reconstruction attacks. However, existing works lack…

Cryptography and Security · Computer Science 2024-08-23 Zifan Wang , Binghui Zhang , Meng Pang , Yuan Hong , Binghui Wang

Federated learning (FL) enables collaborative model training across decentralized clients while preserving data privacy. However, its open-participation nature exposes it to data-poisoning attacks, in which malicious actors submit corrupted…

Machine Learning · Computer Science 2025-07-17 Daniel Commey , Rebecca A. Sarpong , Griffith S. Klogo , Winful Bagyl-Bac , Garth V. Crosby

Motivated by the ever-increasing concerns on personal data privacy and the rapidly growing data volume at local clients, federated learning (FL) has emerged as a new machine learning setting. An FL system is comprised of a central parameter…

Cryptography and Security · Computer Science 2022-08-04 Xiang Ma , Haijian Sun , Rose Qingyang Hu , Yi Qian

Federated learning is vulnerable to poisoning attacks in which malicious clients poison the global model via sending malicious model updates to the server. Existing defenses focus on preventing a small number of malicious clients from…

Cryptography and Security · Computer Science 2022-10-21 Xiaoyu Cao , Jinyuan Jia , Zaixi Zhang , Neil Zhenqiang Gong

Machine learning (ML) over distributed multi-party data is required for a variety of domains. Existing approaches, such as federated learning, collect the outputs computed by a group of devices at a central aggregator and run iterative…

Machine Learning · Computer Science 2020-07-16 Clement Fung , Chris J. M. Yoon , Ivan Beschastnikh

Federated learning (FL) represents a novel paradigm to machine learning, addressing critical issues related to data privacy and security, yet suffering from data insufficiency and imbalance. The emergence of foundation models (FMs) provides…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-11-02 Xi Li , Songhe Wang , Chen Wu , Hao Zhou , Jiaqi Wang

The Federated Learning (FL) workflow of training a centralized model with distributed data is growing in popularity. However, until recently, this was the realm of contributing clients with similar computing capability. The fast expanding…

Machine Learning · Computer Science 2022-03-23 Hongrui Shi , Valentin Radu

In terms of artificial intelligence, there are several security and privacy deficiencies in the traditional centralized training methods of machine learning models by a server. To address this limitation, federated learning (FL) has been…

Cryptography and Security · Computer Science 2022-11-29 Yao Chen , Yijie Gui , Hong Lin , Wensheng Gan , Yongdong Wu