Resisting Backdoor Attacks in Federated Learning via Bidirectional Elections and Individual Perspective
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Abstract (arXiv)
Existing approaches defend against backdoor attacks in federated learning (FL) mainly through a) mitigating the impact of infected models, or b) excluding infected models. The former negatively impacts model accuracy, while the latter usually relies on globally clear boundaries between benign and infected model updates. However, model updates are easy to be mixed and scattered throughout in reality due to the diverse distributions of local data. This work focuses on excluding infected models in FL. Unlike previous perspectives from a global view, we propose Snowball, a novel anti-backdoor FL framework through bidirectional elections from an individual perspective inspired by one principle deduced by us and two principles in FL and deep learning. It is characterized by a) bottom-up election, where each candidate model update votes to several peer ones such that a few model updates are elected as selectees for aggregation; and b) top-down election, where selectees progressively enlarge themselves through picking up from the candidates. We compare Snowball with state-of-the-art defenses to backdoor attacks in FL on five real-world datasets, demonstrating its superior resistance to backdoor attacks and slight impact on the accuracy of the global model.
Key facts. Cited by 6 papers in the map (data through 14 Oct 2026). Builds on 30 of its 50 references that are in the map. First posted on arXiv 28 Sep 2023.
Builds on
30 of 50 references.
References · 30
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18 more
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Built on by
Citing papers per year: 2023: 1; 2024: 1; 2025: 3; 2026: 1.
6 papers.
- 2023Kick Bad Guys Out! Conditionally Activated Anomaly Detection in Federated Learning with Zero-Knowledge Proof Verificationcited by 2
- 2025BackFed: An Efficient & Standardized Benchmark Suite for Backdoor Attacks in Federated Learningcited by 1
- 2026FedSurrogate: Backdoor Defense in Federated Learning via Layer Criticality and Surrogate Replacementcited by 1
- 2024FLAIN: Mitigating Backdoor Attacks in Federated Learning via Flipping Weight Updates of Low-Activation Input Neuronscited by 0
- 2025FedBAP: Backdoor Defense via Benign Adversarial Perturbation in Federated Learningcited by 0
- 2025BAPFL: Exploring Backdoor Attacks Against Prototype-based Federated Learningcited by 0
- 2026FedSurrogate: Backdoor Defense in Federated Learning via Layer Criticality and Surrogate Replacement11 May 2026
- 2025BAPFL: Exploring Backdoor Attacks Against Prototype-based Federated Learning16 Sep 2025
- 2025FedBAP: Backdoor Defense via Benign Adversarial Perturbation in Federated Learning26 Jul 2025
- 2025BackFed: An Efficient & Standardized Benchmark Suite for Backdoor Attacks in Federated Learning7 Jul 2025
- 2024FLAIN: Mitigating Backdoor Attacks in Federated Learning via Flipping Weight Updates of Low-Activation Input Neurons16 Aug 2024
- 2023Kick Bad Guys Out! Conditionally Activated Anomaly Detection in Federated Learning with Zero-Knowledge Proof Verification6 Oct 2023
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- 2026Mitigating Backdoor Attacks in Federated Learning Using PPA and MiniMax Game Theory
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- 2024DeTrigger: A Gradient-Centric Approach to Backdoor Attack Mitigation in Federated Learning
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