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Securing Federated Sensitive Topic Classification against Poisoning Attacks

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NDSS2023.pdf (1.768Mb)
Identificadores
URI: https://hdl.handle.net/20.500.12761/1633
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Autor(es)
Chu, Tianyue; García-Recuero, Álvaro; Iordanou, Costas; Smaragdakis, Georgios; Laoutaris, Nikolaos
Fecha
2023-02-27
Resumen
We present a Federated Learning (FL) based solution for building a distributed classifier capable of detecting URLs containing sensitive content, i.e., content related to categories such as health, political beliefs, sexual orientation, etc. Although such a classifier addresses the limitations of previous offline/centralised classifiers, it is still vulnerable to poisoning attacks from malicious users that may attempt to reduce the accuracy for benign users by disseminating faulty model updates. To guard against this, we develop a robust aggregation scheme based on subjective logic and residual-based attack detection. Employing a combination of theoretical analysis, trace-driven simulation, as well as experimental validation with a prototype and real users, we show that our classifier can detect sensitive content with high accuracy, learn new labels fast, and remain robust in view of poisoning attacks from malicious users, as well as imperfect input from non-malicious ones.
Compartir
Ficheros
NDSS2023.pdf (1.768Mb)
Identificadores
URI: https://hdl.handle.net/20.500.12761/1633
Metadatos
Mostrar el registro completo del ítem

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