Bounded Space Differentially Private Quantiles
Bounded Space Differentially Private Quantiles
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有界空间微分私有分位数
DOI:
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Anamay Chaturvedi
中科院分区:
文献类型:
--
作者:
Daniel Alabi;Omri Ben;Anamay Chaturvedi
Estimating the quantiles of a large dataset is a fundamental problem in both the streaming algorithms literature and the differential privacy literature. However, all existing private mechanisms for distribution-independent quantile computation require space at least linear in the input size $n$. In this work, we devise a differentially private algorithm for the quantile estimation problem, with strongly sublinear space complexity, in the one-shot and continual observation settings. Our basic mechanism estimates any $\alpha$-approximate quantile of a length-$n$ stream over a data universe $\mathcal{X}$ with probability $1-\beta$ using $O\left( \frac{\log (|\mathcal{X}|/\beta) \log (\alpha \epsilon n)}{\alpha \epsilon} \right)$ space while satisfying $\epsilon$-differential privacy at a single time point. Our approach builds upon deterministic streaming algorithms for non-private quantile estimation instantiating the exponential mechanism using a utility function defined on sketch items, while (privately) sampling from intervals defined by the sketch. We also present another algorithm based on histograms that is especially suited to the multiple quantiles case. We implement our algorithms and experimentally evaluate them on synthetic and real-world datasets.
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DOI:
10.1145/3471485.3471488
发表时间:
2020-03
期刊:
ACM SIGMOD Record
影响因子:
--
作者:
Omri Ben-Eliezer;Rajesh Jayaram;David P. Woodruff;E. Yogev
通讯作者:
Omri Ben-Eliezer;Rajesh Jayaram;David P. Woodruff;E. Yogev
影响因子:
--
作者:
Alabi, Daniel;McMillan, Audra;Sarathy, Jayshree;Smith, Adam;Vadhan, Salil
通讯作者:
Vadhan, Salil
DOI:
--
发表时间:
2020-11
期刊:
ArXiv
影响因子:
--
作者:
Christos Tzamos;Emmanouil-Vasileios Vlatakis-Gkaragkounis;Ilias Zadik
通讯作者:
Christos Tzamos;Emmanouil-Vasileios Vlatakis-Gkaragkounis;Ilias Zadik
影响因子:
--
作者:
Balcer, Victor;Vadhan, Salil
通讯作者:
Vadhan, Salil
影响因子:
2.5
作者:
Cormode, Graham;Karnin, Zohar;Liberty, Edo;Thaler, Justin;Veselý, Pavel
通讯作者:
Veselý, Pavel