Search Results for author: Argyris Mouzakis

Found 4 papers, 0 papers with code

Not All Learnable Distribution Classes are Privately Learnable

no code implementations1 Feb 2024 Mark Bun, Gautam Kamath, Argyris Mouzakis, Vikrant Singhal

We give an example of a class of distributions that is learnable in total variation distance with a finite number of samples, but not learnable under $(\varepsilon, \delta)$-differential privacy.

A Bias-Variance-Privacy Trilemma for Statistical Estimation

no code implementations30 Jan 2023 Gautam Kamath, Argyris Mouzakis, Matthew Regehr, Vikrant Singhal, Thomas Steinke, Jonathan Ullman

The canonical algorithm for differentially private mean estimation is to first clip the samples to a bounded range and then add noise to their empirical mean.

New Lower Bounds for Private Estimation and a Generalized Fingerprinting Lemma

no code implementations17 May 2022 Gautam Kamath, Argyris Mouzakis, Vikrant Singhal

First, we provide tight lower bounds for private covariance estimation of Gaussian distributions.

LEMMA

A Private and Computationally-Efficient Estimator for Unbounded Gaussians

no code implementations8 Nov 2021 Gautam Kamath, Argyris Mouzakis, Vikrant Singhal, Thomas Steinke, Jonathan Ullman

We give the first polynomial-time, polynomial-sample, differentially private estimator for the mean and covariance of an arbitrary Gaussian distribution $\mathcal{N}(\mu,\Sigma)$ in $\mathbb{R}^d$.

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