arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2112.05693cs.CR
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样本和阈值差分隐私:直方图及其应用

Sample and Threshold Differential Privacy: Histograms and applications

Akash Bharadwaj, Graham Cormode

摘要:

联合分析试图从分布在用户设备上的数据中计算准确的统计数据,同时提供适当的隐私保证,并且实际上可行。在本文中,我们展示了如何强大的$(ε, δ)$ -差分隐私(DP)保证可以实现的基本问题,直方图生成在联邦设置,通过一个高度实用的采样为基础的程序,不添加噪音披露的数据。考虑到采样在实践中的普遍性,我们因此几乎免费获得DP保证,避免高估直方图计数,并允许轻松推理隐私保证如何掩盖少数群体和离群值。使用这样的直方图,相关的问题,如重打击和分位数可以回答可证明的错误和隐私保证。实验结果表明,我们的样本和阈值的方法是准确的和可扩展的。

英文摘要:

Federated analytics seeks to compute accurate statistics from data distributed across users' devices while providing a suitable privacy guarantee and being practically feasible to implement and scale. In this paper, we show how a strong $(ε, δ)$-Differential Privacy (DP) guarantee can be achieved for the fundamental problem of histogram generation in a federated setting, via a highly practical sampling-based procedure that does not add noise to disclosed data. Given the ubiquity of sampling in practice, we thus obtain a DP guarantee almost for free, avoid over-estimating histogram counts, and allow easy reasoning about how privacy guarantees may obscure minorities and outliers. Using such histograms, related problems such as heavy hitters and quantiles can be answered with provable error and privacy guarantees. Experimental results show that our sample-and-threshold approach is accurate and scalable.

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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