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Improving Technical Security 14 March 2019

Introduction to DNS Privacy

Almost every time we use an Internet application, it starts with a DNS (Domain Name System) transaction to map a human-friendly domain name to a set of IP addresses that can be used to deliver packets over the Internet. DNS transactions can therefore be correlated to the applications we use, the websites we visit, and sometimes even the people we communicate with.

While the domain name information itself is public, the transactions performed by the hosts are not. Unfortunately, the DNS does not inherently employ any mechanisms to provide confidentiality for these transactions, and the corresponding information can therefore easily be logged by the operators of DNS resolvers and name servers, as well as be eavesdropped by others.

So we are publishing our Introduction to DNS Privacy to raise awareness of the privacy implications of the DNS, and the mechanisms that have been recently developed to improve user privacy.

Please also check our DNS Privacy page for more information!

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Disclaimer: Viewpoints expressed in this post are those of the author and may or may not reflect official Internet Society positions.

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