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The decentralized nature of federated learning makes detecting and defending against adversarial attacks a challenging task. This paper focuses on backdoor attacks in the federated learning setting, where the goal of the adversary is to…

Machine Learning · Computer Science 2019-12-04 Ziteng Sun , Peter Kairouz , Ananda Theertha Suresh , H. Brendan McMahan

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 (FL) has become very popular since it enables clients to train a joint model collaboratively without sharing their private data. However, FL has been shown to be susceptible to backdoor and inference attacks. While in the…

Cryptography and Security · Computer Science 2023-08-02 Huimin Li , Phillip Rieger , Shaza Zeitouni , Stjepan Picek , Ahmad-Reza Sadeghi

In the evolving landscape of Federated Learning (FL), a new type of attacks concerns the research community, namely Data Poisoning Attacks, which threaten the model integrity by maliciously altering training data. This paper introduces a…

Cryptography and Security · Computer Science 2024-04-22 Nick Galanis

Federated learning (FL) addresses privacy and data-silo issues in the training of large language models (LLMs). Most prior work focuses on improving the efficiency of federated learning for LLMs (FedLLM). However, security in open federated…

Cryptography and Security · Computer Science 2026-04-21 Mingxiang Tao , Yu Tian , Wenxuan Tu , Yue Yang , Xue Yang , Xiangyan Tang

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

In RPL security, intrusion detection (ID) plays a vital role, especially given its susceptibility to attacks, particularly those carried out by insider threats. While numerous studies in the literature have proposed intrusion detection…

Cryptography and Security · Computer Science 2025-03-25 Selim Yilmaz , Sevil Sen , Emre Aydogan

Federated learning (FL) is an emerging distributed machine learning paradigm proposed for privacy preservation. Unlike traditional centralized learning approaches, FL enables multiple users to collaboratively train a shared global model…

Cryptography and Security · Computer Science 2024-10-01 Hangyu Zhu , Liyuan Huang , Zhenping Xie

Federated Learning (FL) is designed to prevent data leakage through collaborative model training without centralized data storage. However, it remains vulnerable to gradient reconstruction attacks that recover original training data from…

Machine Learning · Computer Science 2024-11-07 Yuxiao Chen , Gamze Gürsoy , Qi Lei

Federated Contrastive Learning (FCL) is an emerging privacy-preserving paradigm in distributed learning for unlabeled data. In FCL, distributed parties collaboratively learn a global encoder with unlabeled data, and the global encoder could…

Cryptography and Security · Computer Science 2023-11-29 Yao Huang , Kongyang Chen , Jiannong Cao , Jiaxing Shen , Shaowei Wang , Yun Peng , Weilong Peng , Kechao Cai

Backdoor attacks pose a significant threat to deep learning models by implanting hidden vulnerabilities that can be activated by malicious inputs. While numerous defenses have been proposed to mitigate these attacks, the heterogeneous…

Cryptography and Security · Computer Science 2025-11-18 Gorka Abad , Marina Krček , Stefanos Koffas , Behrad Tajalli , Marco Arazzi , Roberto Riaño , Xiaoyun Xu , Zhuoran Liu , Antonino Nocera , Stjepan Picek

Federated learning (FL), which aims to facilitate data collaboration across multiple organizations without exposing data privacy, encounters potential security risks. One serious threat is backdoor attacks, where an attacker injects a…

Cryptography and Security · Computer Science 2023-06-21 Yuexin Xuan , Xiaojun Chen , Zhendong Zhao , Bisheng Tang , Ye Dong

The widespread adoption of deep learning across various industries has introduced substantial challenges, particularly in terms of model explainability and security. The inherent complexity of deep learning models, while contributing to…

Cryptography and Security · Computer Science 2025-01-08 Kealan Dunnett , Reza Arablouei , Dimity Miller , Volkan Dedeoglu , Raja Jurdak

Federated Learning (FL) has been recently receiving increasing consideration from the cybersecurity community as a way to collaboratively train deep learning models with distributed profiles of cyber threats, with no disclosure of training…

Cryptography and Security · Computer Science 2023-11-21 Roberto Doriguzzi-Corin , Domenico Siracusa

Federated learning (FL) enables privacy-preserving collaborative model training but remains vulnerable to adversarial behaviors that compromise model utility or fairness across sensitive groups. While extensive studies have examined attacks…

Machine Learning · Computer Science 2025-11-13 Yanli Li , Yanan Zhou , Zhongliang Guo , Nan Yang , Yuning Zhang , Huaming Chen , Dong Yuan , Weiping Ding , Witold Pedrycz

Federated Learning (FL) enables collaborative model training across multiple devices while preserving data privacy. However, it remains susceptible to backdoor attacks, where malicious participants can compromise the global model. Existing…

Cryptography and Security · Computer Science 2025-02-26 Ebtisaam Alharbi , Leandro Soriano Marcolino , Qiang Ni , Antonios Gouglidis

The main premise of federated learning (FL) is that machine learning model updates are computed locally to preserve user data privacy. This approach avoids by design user data to ever leave the perimeter of their device. Once the updates…

Machine Learning · Computer Science 2023-09-15 Simon Queyrut , Valerio Schiavoni , Pascal Felber

Federated learning (FL) has emerged as a new paradigm for privacy-preserving collaborative training. Under domain skew, the current FL approaches are biased and face two fairness problems. 1) Parameter Update Conflict: data disparity among…

Machine Learning · Computer Science 2024-05-28 Yuhang Chen , Wenke Huang , Mang Ye

Current defense mechanisms against model poisoning attacks in federated learning (FL) systems have proven effective up to a certain threshold of malicious clients. In this work, we introduce FLANDERS, a novel pre-aggregation filter for FL…

Machine Learning · Computer Science 2026-03-03 Edoardo Gabrielli , Dimitri Belli , Zoe Matrullo , Vittorio Miori , Gabriele Tolomei

Hierarchical federated learning (HFL) is a promising distributed deep learning model training paradigm, but it has crucial security concerns arising from adversarial attacks. This research investigates and assesses the security of HFL using…

Machine Learning · Computer Science 2024-08-21 D Alqattan , R Sun , H Liang , G Nicosia , V Snasel , R Ranjan , V Ojha