arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.05974cs.CR
收藏

公平和差异私有的分布式频率估计

Fair and Differentially Private Distributed Frequency Estimation

Mengmeng Yang, Ivan Tjuawinata, Kwok-Yan Lam, Tianqing Zhu, Jun Zhao

摘要:

为了保持竞争力,互联网公司收集和分析用户数据,以改善用户体验。频率估计是一种广泛使用的统计工具,可能与相关的隐私法规发生冲突。基于差分隐私的隐私保护分析方法已经被提出,这需要一个大的用户群或一个可信的服务器,因此可能会给大公司一个不公平的优势,而阻碍小组织在他们的成长机会。为了解决这个问题,本文提出了一种公平的隐私保护采样的频率估计方法,并提供了它的隐私保证,输出精度和参与者的数量之间的关系。我们使用多方计算技术设计了分散的隐私保护聚合机制,并确定,对于有限数量的参与者和固定的隐私级别,我们的机制比基于传统扰动方法的机制表现更好,因此,为较小的公司提供了公平的增长机会。我们进一步提出了一个架构模型,以支持加权聚合,以达到更高的准确性估计,以满足不同的隐私要求的用户。与未加权的聚合相比,我们的方法提供了一个更准确的估计。大量的实验表明了所提方法的有效性。

英文摘要:

In order to remain competitive, Internet companies collect and analyse user data for the purpose of improving user experiences. Frequency estimation is a widely used statistical tool which could potentially conflict with the relevant privacy regulations. Privacy preserving analytic methods based on differential privacy have been proposed, which either require a large user base or a trusted server; hence may give big companies an unfair advantage while handicapping smaller organizations in their growth opportunity. To address this issue, this paper proposes a fair privacy-preserving sampling-based frequency estimation method and provides a relation between its privacy guarantee, output accuracy, and number of participants. We designed decentralized privacy-preserving aggregation mechanisms using multi-party computation technique and established that, for a limited number of participants and a fixed privacy level, our mechanisms perform better than those that are based on traditional perturbation methods; hence, provide smaller companies a fair growth opportunity. We further propose an architectural model to support weighted aggregation in order to achieve higher accuracy estimate to cater for users with different privacy requirements. Compared to the unweighted aggregation, our method provides a more accurate estimate. Extensive experiments are conducted to show the effectiveness of the proposed methods.

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。

↑