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Anonymized Histograms in Intermediate Privacy Models. (arXiv:2210.15178v1 [cs.DS])
Oct. 28, 2022, 1:11 a.m. | Badih Ghazi, Pritish Kamath, Ravi Kumar, Pasin Manurangsi
cs.LG updates on arXiv.org arxiv.org
We study the problem of privately computing the anonymized histogram (a.k.a.
unattributed histogram), which is defined as the histogram without item labels.
Previous works have provided algorithms with $\ell_1$- and $\ell_2^2$-errors of
$O_\varepsilon(\sqrt{n})$ in the central model of differential privacy (DP).
In this work, we provide an algorithm with a nearly matching error guarantee
of $\tilde{O}_\varepsilon(\sqrt{n})$ in the shuffle DP and pan-private models.
Our algorithm is very simple: it just post-processes the discrete
Laplace-noised histogram! Using this algorithm as a …
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