FRIDA: Free-Rider Detection using Privacy Attacks
<|reference_start|>FRIDA: Free-Rider Detection using Privacy Attacks: Federated learning is increasingly popular as it enables multiple parties with limited datasets and resources to train a high-performing machine learning model collaboratively. However, similarly to other collaborative systems, federated learning is vulnerable to free-riders -- participants who do not contribute to the training but still benefit from the shared model. Free-riders not only compromise the integrity of the learning process but also slow down the convergence of the global model, resulting in increased costs for the honest participants.   To address this challenge, we propose FRIDA: free-rider detection using privacy attacks, a framework that leverages inference attacks to detect free-riders. Unlike traditional methods that only capture the implicit effects of free-riding, FRIDA directly infers details of the underlying training datasets, revealing characteristics that indicate free-rider behaviour. Through extensive experiments, we demonstrate that membership and property inference attacks are effective for this purpose. Our evaluation shows that FRIDA outperforms state-of-the-art methods, especially in non-IID settings.<|reference_end|>
@article{recasens2024frida:,
    title={FRIDA: Free-Rider Detection using Privacy Attacks},
    author={Pol G. Recasens and 'Ad'am Horv'ath and Alberto Gutierrez-Torre and
  Jordi Torres and Josep Ll.Berral and Bal'azs Pej'o},
    journal={arXiv preprint arXiv:2410.05020},
    year={2024},
    archivePrefix={arXiv},
    eprint={2410.05020},
    primaryClass={cs.LG cs.CR}
}