Zen and the art of model adaptation: Low-utility-cost attack mitigations in collaborative machine learning

In this study, we aim to bridge the gap between the theoretical understanding of attacks against collaborative machine learning workflows and their practical ramifications by considering the effects of model architecture, learning setting and hyperparameters on the resilience against attacks. We ref...

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Autores principales: Usynin Dmitrii, Rueckert Daniel, Passerat-Palmbach Jonathan, Kaissis Georgios
Formato: article
Lenguaje:EN
Publicado: Sciendo 2022
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Acceso en línea:https://doaj.org/article/56cd977fda7b4e01ba8ccebbda7d6e6e
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Sumario:In this study, we aim to bridge the gap between the theoretical understanding of attacks against collaborative machine learning workflows and their practical ramifications by considering the effects of model architecture, learning setting and hyperparameters on the resilience against attacks. We refer to such mitigations as model adaptation. Through extensive experimentation on both, benchmark and real-life datasets, we establish a more practical threat model for collaborative learning scenarios. In particular, we evaluate the impact of model adaptation by implementing a range of attacks belonging to the broader categories of model inversion and membership inference. Our experiments yield two noteworthy outcomes: they demonstrate the difficulty of actually conducting successful attacks under realistic settings when model adaptation is employed and they highlight the challenge inherent in successfully combining model adaptation and formal privacy-preserving techniques to retain the optimal balance between model utility and attack resilience.