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#1 Approximate Differential Privacy of the $\ell_2$ Mechanism [PDF] [Copy] [Kimi] [REL]

Authors: Matthew Joseph, Alex Kulesza, Alexander Yu

We study the $\ell_2$ mechanism for computing a $d$-dimensional statistic with bounded $\ell_2$ sensitivity under approximate differential privacy. Across a range of privacy parameters, we find that the $\ell_2$ mechanism obtains error approaching that of the Laplace mechanism as $d \to 1$ and approaching that of the Gaussian mechanism as $d \to \infty$; however, it dominates both in between.

Subject: ICML.2025 - Poster