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arXiv 1707.02702cs.LGcs.CRstat.ML
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时间序列数据推理隐私的合成性质

Composition Properties of Inferential Privacy for Time-Series Data

University of California San Diego(加利福尼亚大学圣迭戈分校)

Shuang Song, Kamalika Chaudhuri

摘要:

随着移动设备和物联网的普及,在时间序列应用中开发原则性的隐私解决方案变得越来越重要。虽然差分隐私是数据库隐私的黄金标准,但许多时间序列应用程序需要不同类型的保证,并且许多最近的作品使用某种形式的推理隐私来解决这些情况。然而,在实践中使用推理隐私的一个主要障碍是它缺乏优雅的组合-即使相同或相关的敏感数据在多个单独安全的版本中使用,组合的版本可能具有较差的隐私属性。在本文中,我们研究的一种形式的推理隐私称为河豚时,应用于时间序列数据的组成特性。我们表明,虽然一般河豚机制可能不会优雅地组成,一个特定的河豚机制,称为马尔可夫被子机制,这是最近推出的,具有较强的组成属性,可与纯差分隐私时,应用于时间序列数据。

英文摘要:

With the proliferation of mobile devices and the internet of things, developing principled solutions for privacy in time series applications has become increasingly important. While differential privacy is the gold standard for database privacy, many time series applications require a different kind of guarantee, and a number of recent works have used some form of inferential privacy to address these situations. However, a major barrier to using inferential privacy in practice is its lack of graceful composition -- even if the same or related sensitive data is used in multiple releases that are safe individually, the combined release may have poor privacy properties. In this paper, we study composition properties of a form of inferential privacy called Pufferfish when applied to time-series data. We show that while general Pufferfish mechanisms may not compose gracefully, a specific Pufferfish mechanism, called the Markov Quilt Mechanism, which was recently introduced, has strong composition properties comparable to that of pure differential privacy when applied to time series data.

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