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Federated learning enables thousands of participants to construct a deep learning model without sharing their private training data with each other. For example, multiple smartphones can jointly train a next-word predictor for keyboards…

Cryptography and Security · Computer Science 2019-08-07 Eugene Bagdasaryan , Andreas Veit , Yiqing Hua , Deborah Estrin , Vitaly Shmatikov

The field of few-shot learning (FSL) has shown promising results in scenarios where training data is limited, but its vulnerability to backdoor attacks remains largely unexplored. We first explore this topic by first evaluating the…

Cryptography and Security · Computer Science 2024-01-04 Xinwei Liu , Xiaojun Jia , Jindong Gu , Yuan Xun , Siyuan Liang , Xiaochun Cao

In a federated learning (FL) system, decentralized data owners (clients) could upload their locally trained models to a central server, to jointly train a global model. Malicious clients may plant backdoors into the global model through…

Cryptography and Security · Computer Science 2024-06-03 Songze Li , Yanbo Dai

Traditional backdoor attacks in federated learning (FL) operate within constrained attack scenarios, as they depend on visible triggers and require physical modifications to the target object, which limits their practicality. To address…

Machine Learning · Computer Science 2025-09-17 Jiahao Xu , Zikai Zhang , Rui Hu

This paper investigates the vulnerability of spiking neural networks (SNNs) and federated learning (FL) to backdoor attacks using neuromorphic data. Despite the efficiency of SNNs and the privacy advantages of FL, particularly in…

Cryptography and Security · Computer Science 2024-02-06 Gorka Abad , Stjepan Picek , Aitor Urbieta

Backdoor attacks are dangerous and difficult to prevent in federated learning (FL), where training data is sourced from untrusted clients over long periods of time. These difficulties arise because: (a) defenders in FL do not have access to…

Machine Learning · Computer Science 2023-02-01 Shuaiqi Wang , Jonathan Hayase , Giulia Fanti , Sewoong Oh

Semantic communication systems, which leverage Generative AI (GAI) to transmit semantic meaning rather than raw data, are poised to revolutionize modern communications. However, they are vulnerable to backdoor attacks, a type of poisoning…

Cryptography and Security · Computer Science 2025-02-07 Ziyang Wei , Yili Jiang , Jiaqi Huang , Fangtian Zhong , Sohan Gyawali

Federated self-supervised learning (FSSL) enables collaborative training of self-supervised representation models without sharing raw unlabeled data. While it serves as a crucial paradigm for privacy-preserving learning, its security…

Cryptography and Security · Computer Science 2026-02-03 Jiayao Wang , Yang Song , Zhendong Zhao , Jiale Zhang , Qilin Wu , Wenliang Yuan , Junwu Zhu , Dongfang Zhao

Research on backdoor attacks in Federated Learning (FL) has accelerated in recent years, with new attacks and defenses continually proposed in an escalating arms race. However, the evaluation of these methods remains neither standardized…

Cryptography and Security · Computer Science 2025-11-26 Thinh Dao , Dung Thuy Nguyen , Khoa D Doan , Kok-Seng Wong

Quantum Federated Learning (QFL) inherits the core vulnerability of federated optimization to malicious clients, while also introducing an attack surface from variational circuit training and measurement-driven gradients. This work proposes…

Quantum Physics · Physics 2026-05-28 Aakar Mathur , Mohammed Ruknuddin , Ashish Gupta

Federated learning (FL) is a distributed machine learning paradigm where enormous scattered clients (e.g. mobile devices or IoT devices) collaboratively train a model under the orchestration of a central server (e.g. service provider),…

Cryptography and Security · Computer Science 2022-01-12 Yongkang Wang , Dihua Zhai , Yufeng Zhan , Yuanqing Xia

Federated Learning (FL) has emerged as a promising approach to address data privacy and confidentiality concerns by allowing multiple participants to construct a shared model without centralizing sensitive data. However, this decentralized…

Cryptography and Security · Computer Science 2023-07-25 Jahid Hasan

Federated Learning (FL) is a promising approach enabling multiple clients to train Deep Neural Networks (DNNs) collaboratively without sharing their local training data. However, FL is susceptible to backdoor (or targeted poisoning)…

Cryptography and Security · Computer Science 2023-08-23 Phillip Rieger , Torsten Krauß , Markus Miettinen , Alexandra Dmitrienko , Ahmad-Reza Sadeghi

Federated Learning is an important emerging distributed training paradigm that keeps data private on clients. It is now well understood that by controlling only a small subset of FL clients, it is possible to introduce a backdoor to a…

Machine Learning · Computer Science 2026-01-14 Joseph Rance , Filip Svoboda

Federated learning (FL) enables multiple parties to collaboratively train a machine learning model without sharing their data; rather, they train their own model locally and send updates to a central server for aggregation. Depending on how…

Machine Learning · Computer Science 2023-08-25 Mohammad Naseri , Yufei Han , Emiliano De Cristofaro

Federated Learning (FL) is a collaborative machine learning technique where multiple clients work together with a central server to train a global model without sharing their private data. However, the distribution shift across non-IID…

Machine Learning · Computer Science 2024-06-11 Xiaoting Lyu , Yufei Han , Wei Wang , Jingkai Liu , Yongsheng Zhu , Guangquan Xu , Jiqiang Liu , Xiangliang Zhang

Federated learning (FL) provides autonomy and privacy by design to participating peers, who cooperatively build a machine learning (ML) model while keeping their private data in their devices. However, that same autonomy opens the door for…

Cryptography and Security · Computer Science 2022-07-06 Najeeb Moharram Jebreel , Josep Domingo-Ferrer , David Sánchez , Alberto Blanco-Justicia

Large-scale unlabeled data has spurred recent progress in self-supervised learning methods that learn rich visual representations. State-of-the-art self-supervised methods for learning representations from images (e.g., MoCo, BYOL, MSF) use…

Computer Vision and Pattern Recognition · Computer Science 2022-06-10 Aniruddha Saha , Ajinkya Tejankar , Soroush Abbasi Koohpayegani , Hamed Pirsiavash

Federated learning (FL) has been demonstrated to be susceptible to backdoor attacks. However, existing academic studies on FL backdoor attacks rely on a high proportion of real clients with main task-related data, which is impractical. In…

Cryptography and Security · Computer Science 2024-05-07 Minghui Li , Wei Wan , Yuxuan Ning , Shengshan Hu , Lulu Xue , Leo Yu Zhang , Yichen Wang

Federated Learning (FL) enables multiple clients to collaboratively train a shared model without exposing local data. However, backdoor attacks pose a significant threat to FL. These attacks aim to implant a stealthy trigger into the global…

Machine Learning · Computer Science 2026-01-06 Chenyu Hu , Qiming Hu , Sinan Chen , Nianyu Li , Mingyue Zhang , Jialong Li