I still have a printed copy of #NIST SP 800-81 Rev. 2 from 2013 on my shelf.
During hcG’s founding phase, while preparing a #DNSsecurity workshop, it was one of my references. In Sept. 2019, I even asked Scott Rose whether rev. 2 was still current.
For much of the broader #DNS community, there is no surprise. The value of rev. 3 is bringing today’s DNS security picture together in one document: https://csrc.nist.gov/pubs/sp/800/81/r3/final







