Security

Deploying Cryptography in Domain Name System: An Overview

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Executive Summary

The Domain Name System (DNS) has become a critical operational part of the Internet Infrastructure, yet it has no strong security mechanisms to assure Data Integrity or Authentication. Extensions to the DNS are described that provide these services to security aware resolves are applications through the use of Cryptographic Digital Signatures. These Digital Signatures are included zones as resource records. The extensions also provide for the storage of Authenticated Public keys in the DNS. This storage of keys can support general Public key distribution services as well as DNS security. These stored keys enables security aware resolvers to learn the authenticating key of zones, in addition to those for which they are initially configured. Keys associated with DNS names can be retrieved to support other protocols.

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