no code implementations • 1 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.
no code implementations • 30 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.
no code implementations • 17 May 2022 • Gautam Kamath, Argyris Mouzakis, Vikrant Singhal
First, we provide tight lower bounds for private covariance estimation of Gaussian distributions.
no code implementations • 8 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 $\mathbb{R}^d$.