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Local and Central Differential Privacy for Robustness and Privacy in Federated Learning - 2020

Local And Central Differential Privacy For Robustness And Privacy In Federated Learning

Research Area:  Machine Learning


Federated Learning (FL) allows multiple participants to train machine learning models collaboratively by keeping their datasets local while only exchanging model updates. Alas, this is not necessarily free from privacy and robustness vulnerabilities, e.g., via membership, property, and backdoor attacks. This paper investigates whether and to what extent one can use differential Privacy (DP) to protect both privacy and robustness in FL. To this end, we present a first-of-its-kind evaluation of Local and Central Differential Privacy (LDP/CDP) techniques in FL, assessing their feasibility and effectiveness. Our experiments show that both DP variants do d fend against backdoor attacks, albeit with varying levels of protection-utility trade-offs, but anyway more effectively than other robustness defenses. DP also mitigates white-box membership inference attacks in FL, and our work is the first to show it empirically. Neither LDP nor CDP, however, defend against property inference. Overall, our work provides a comprehensive, re-usable measurement methodology to quantify the trade-offs between robustness/privacy and utility in differentially private FL.


Author(s) Name:  Mohammad Naseri, Jamie Hayes, Emiliano De Cristofaro

Journal name:  Computer Science

Conferrence name:  

Publisher name:  arXiv:2009.03561

DOI:  10.48550/arXiv.2009.03561

Volume Information: