arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.16787cs.DScs.CR
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连续观察下的差异私有直方图:将选择流到未知中

Differentially Private Histograms under Continual Observation: Streaming Selection into the Unknown

Adrian Rivera Cardoso, Ryan Rogers

摘要:

我们通过允许流中的每个事件是某些(可能未知的)项目宇宙的子集来概括Dwork等人的连续观察隐私设置。我们在几种设置中为直方图设计了差分隐私(DP)算法,包括顶部$k$选择,隐私损失与polylog $(T)$成比例,其中$T$是输入流的最大长度。我们提出了一个元算法,可以使用现有的一杆顶- $k$ DP算法作为一个子程序,不断释放私人直方图从一个流。此外,我们提出了更实用的DP算法的两个设置:1)连续释放顶部$k$计数从直方图在一个已知的域时,一个事件可以由任意数量的项目,和2)连续释放直方图在一个未知的域时,一个事件具有有限数量的项目。

英文摘要:

We generalize the continuous observation privacy setting from Dwork et al. '10 and Chan et al. '11 by allowing each event in a stream to be a subset of some (possibly unknown) universe of items. We design differentially private (DP) algorithms for histograms in several settings, including top-$k$ selection, with privacy loss that scales with polylog$(T)$, where $T$ is the maximum length of the input stream. We present a meta-algorithm that can use existing one-shot top-$k$ DP algorithms as a subroutine to continuously release private histograms from a stream. Further, we present more practical DP algorithms for two settings: 1) continuously releasing the top-$k$ counts from a histogram over a known domain when an event can consist of an arbitrary number of items, and 2) continuously releasing histograms over an unknown domain when an event has a limited number of items.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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