Locally Differentially Private Frequency Estimation with Consistency

arXiv1905.08320MaRDI QIDQ6319063

Author name not available (Why is that?)

Publication date: 20 May 2019

Abstract: Local Differential Privacy (LDP) protects user privacy from the data collector. LDP protocols have been increasingly deployed in the industry. A basic building block is frequency oracle (FO) protocols, which estimate frequencies of values. While several FO protocols have been proposed, the design goal does not lead to optimal results for answering many queries. In this paper, we show that adding post-processing steps to FO protocols by exploiting the knowledge that all individual frequencies should be non-negative and they sum up to one can lead to significantly better accuracy for a wide range of tasks, including frequencies of individual values, frequencies of the most frequent values, and frequencies of subsets of values. We consider 10 different methods that exploit this knowledge differently. We establish theoretical relationships between some of them and conducted extensive experimental evaluations to understand which methods should be used for different query tasks.

Has companion code repository: https://github.com/vvv214/LDP_Protocols/tree/master/post-process

This page was built for publication: Locally Differentially Private Frequency Estimation with Consistency

Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q6319063)