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Federated Learning enables entities to collaboratively learn a shared prediction model while keeping their training data locally. It prevents data collection and aggregation and, therefore, mitigates the associated privacy risks. However,…

Cryptography and Security · Computer Science 2020-10-16 Raouf Kerkouche , Gergely Ács , Claude Castelluccia

Federated learning enables training high-utility models across several clients without directly sharing their private data. As a downside, the federated setting makes the model vulnerable to various adversarial attacks in the presence of…

Machine Learning · Computer Science 2024-03-12 Xiaoyang Wang , Dimitrios Dimitriadis , Sanmi Koyejo , Shruti Tople

Federated self-supervised learning (FSSL) combines the advantages of decentralized modeling and unlabeled representation learning, serving as a cutting-edge paradigm with strong potential for scalability and privacy preservation. Although…

Cryptography and Security · Computer Science 2025-08-12 Jiayao Wang , Yang Song , Zhendong Zhao , Jiale Zhang , Qilin Wu , Junwu Zhu , Dongfang Zhao

Federated Learning (FL) is a decentralized machine learning method that enables participants to collaboratively train a model without sharing their private data. Despite its privacy and scalability benefits, FL is susceptible to backdoor…

Cryptography and Security · Computer Science 2024-09-11 Yujie Zhang , Neil Gong , Michael K. Reiter

The distributed nature of training makes Federated Learning (FL) vulnerable to backdoor attacks, where malicious model updates aim to compromise the global model's performance on specific tasks. Existing defense methods show limited…

Machine Learning · Computer Science 2025-03-20 Jiahao Xu , Zikai Zhang , Rui Hu

Federated Learning (FL) is an emerging solution to the data scarcity problem for training deep learning models in hardware assurance. While FL is designed to enhance privacy by not sharing raw data, it remains vulnerable to Membership…

Cryptography and Security · Computer Science 2026-04-23 Gijung Lee , Wavid Bowman , Olivia P. Dizon-Paradis , Reiner N. Dizon-Paradis , Ronald Wilson , Damon L. Woodard , Domenic Forte

Federated learning (FL) is vulnerable to backdoor attacks, yet most existing methods are limited by fixed-pattern or single-target triggers, making them inflexible and easier to detect. We propose FLAT (FL Arbitrary-Target Attack), a novel…

Machine Learning · Computer Science 2025-08-07 Tuan Nguyen , Khoa D Doan , Kok-Seng Wong

Federated Learning (FL) has received increasing attention due to its privacy protection capability. However, the base algorithm FedAvg is vulnerable when it suffers from so-called backdoor attacks. Former researchers proposed several robust…

Cryptography and Security · Computer Science 2022-12-29 Jianyi Zhang , Fangjiao Zhang , Qichao Jin , Zhiqiang Wang , Xiaodong Lin , Xiali Hei

Federated Learning (FL) is a privacy-preserving distributed machine learning technique that enables individual clients (e.g., user participants, edge devices, or organizations) to train a model on their local data in a secure environment…

Cryptography and Security · Computer Science 2024-02-26 Waris Gill , Ali Anwar , Muhammad Ali Gulzar

Machine Learning (ML) techniques have shown strong potential for network traffic analysis; however, their effectiveness depends on access to representative, up-to-date datasets, which is limited in cybersecurity due to privacy and…

Cryptography and Security · Computer Science 2025-09-23 Roberto Doriguzzi-Corin , Petr Sabel , Silvio Cretti , Silvio Ranise

Federated Learning (FL) is an emerging distributed machine learning paradigm enabling multiple clients to train a global model collaboratively without sharing their raw data. While FL enhances data privacy by design, it remains vulnerable…

Recent studies have shown that federated learning (FL) is vulnerable to poisoning attacks that inject a backdoor into the global model. These attacks are effective even when performed by a single client, and undetectable by most existing…

Cryptography and Security · Computer Science 2021-04-20 Sebastien Andreina , Giorgia Azzurra Marson , Helen Möllering , Ghassan Karame

Backdoors on federated learning will be diluted by subsequent benign updates. This is reflected in the significant reduction of attack success rate as iterations increase, ultimately failing. We use a new metric to quantify the degree of…

Cryptography and Security · Computer Science 2024-04-30 Tao Liu , Yuhang Zhang , Zhu Feng , Zhiqin Yang , Chen Xu , Dapeng Man , Wu Yang

Federated Learning (FL) is increasingly adopted for privacy-preserving collaborative training, but its decentralized nature makes it particularly susceptible to backdoor attacks. Existing attack methods, however, often rely on idealized…

Cryptography and Security · Computer Science 2025-08-21 Xuezheng Qin , Ruwei Huang , Xiaolong Tang , Feng Li

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

Federated Learning (FL) enables collaborative model training across distributed devices while preserving local data privacy, making it ideal for mobile and embedded systems. However, the decentralized nature of FL also opens vulnerabilities…

Machine Learning · Computer Science 2026-05-08 Kichang Lee , Yujin Shin , Jonghyuk Yun , Songkuk Kim , Jun Han , JeongGil Ko

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) is a distributed learning process that uses a trusted aggregation server to allow multiple parties (or clients) to collaboratively train a machine learning model without having them share their private data. Recent…

Cryptography and Security · Computer Science 2023-10-04 Jorge Castillo , Phillip Rieger , Hossein Fereidooni , Qian Chen , Ahmad Sadeghi

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

Backdoor attacks on federated learning (FL) are most often evaluated with synthetic corner patches or out-of-distribution (OOD) patterns that are unlikely to arise in practice. In this paper, we revisit the backdoor threat to standard FL (a…

Cryptography and Security · Computer Science 2026-04-08 Kavindu Herath , Joshua Zhao , Saurabh Bagchi