Differentially Private Learning Needs Better Features (or Much More Data)Download PDF

Sep 28, 2020 (edited Feb 18, 2021)ICLR 2021 SpotlightReaders: Everyone
  • Keywords: Differential Privacy, Privacy, Deep Learning
  • Abstract: We demonstrate that differentially private machine learning has not yet reached its ''AlexNet moment'' on many canonical vision tasks: linear models trained on handcrafted features significantly outperform end-to-end deep neural networks for moderate privacy budgets. To exceed the performance of handcrafted features, we show that private learning requires either much more private data, or access to features learned on public data from a similar domain. Our work introduces simple yet strong baselines for differentially private learning that can inform the evaluation of future progress in this area.
  • One-sentence Summary: Linear models with handcrafted features outperform end-to-end CNNs for differentially private learning
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