A random-dropping mechanism tunes hyperparameters under ex-post DP with about a 2x privacy blowup for the winning candidate, and extends to Rényi DP.
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Private Hyperparameter Tuning with Ex-Post Guarantee
A random-dropping mechanism tunes hyperparameters under ex-post DP with about a 2x privacy blowup for the winning candidate, and extends to Rényi DP.