论文标题
多分析师差异隐私的预算共享
Budget Sharing for Multi-Analyst Differential Privacy
论文作者
论文摘要
收集有关人口数据的大型组织(例如美国人口普查局)发布了摘要统计数据,这些统计数据被多个利益相关者用于资源分配和政策制定问题。这些组织在法律上也需要保护他们收集数据的个人的隐私。差异隐私(DP)提供了一个解决方案,可以在保留隐私时发布有用的摘要数据。大多数DP机制旨在回答一组查询。实际上,通常有多个利益相关者使用给定的数据发布,并且具有重叠但并非相同的查询。这引入了DP中的新型联合优化问题,其中必须在不同的分析师之间共享隐私预算。 我们开始研究多个分析师的DP查询问题。为了捕获多个分析师的竞争目标和优先级,我们制定了三个避税者,任何机制在这种情况下都应满足的 - 共享激励措施,非干预和适应性 - 同时仍针对整体错误进行优化。我们演示了多分析师设置中现有的DP查询答录机制如何无法满足至少一种Desiderata。我们提出了新颖的DP算法,这些算法可以满足我们所有的逃避者,并从经验上表明它们在现实任务上会遇到低错误。
Large organizations that collect data about populations (like the US Census Bureau) release summary statistics that are used by multiple stakeholders for resource allocation and policy making problems. These organizations are also legally required to protect the privacy of individuals from whom they collect data. Differential Privacy (DP) provides a solution to release useful summary data while preserving privacy. Most DP mechanisms are designed to answer a single set of queries. In reality, there are often multiple stakeholders that use a given data release and have overlapping but not-identical queries. This introduces a novel joint optimization problem in DP where the privacy budget must be shared among different analysts. We initiate study into the problem of DP query answering across multiple analysts. To capture the competing goals and priorities of multiple analysts, we formulate three desiderata that any mechanism should satisfy in this setting -- The Sharing Incentive, Non-Interference, and Adaptivity -- while still optimizing for overall error. We demonstrate how existing DP query answering mechanisms in the multi-analyst settings fail to satisfy at least one of the desiderata. We present novel DP algorithms that provably satisfy all our desiderata and empirically show that they incur low error on realistic tasks.