Distributed dns security infrastructure to preserve privacy data

Abstract

Techniques for leveraging a distributed Domain Name System (DNS) infrastructure for preserving Personally Identifiable Information (PII) data by creating a hash to policy pair (HPP) database on premises at an enterprise organization. A policy engine hosted on premises at an enterprise organization applies a cryptographic hash function to metadata including PII associated with a client of the enterprise organization to generate a client hash value. The HPP is created by mapping the client hash value to a set of DNS policy instructions associated with the client and stored in the HPP database. The HPP database in published to a DNS security service, such that the DNS security service can resolve a DNS query for the client of the enterprise organization absent knowledge of the PII associated with the client by mapping the client hash value included in the DNS query to the client HPP in the HPP database.