# NSEC3 white paper v2


(This is an English translation of [this blog article over at
sidnlabs.nl](http://www.sidnlabs.nl/laatste-berichten/nieuwsdetail/article/nieuwe-versie-sidn-nsec3-white-paper-beschikbaar/))

After the publication of the [SIDN NSEC3 white paper](http://www.sidnlabs.nl/laatste-berichten/nieuwsdetail/article/nsec3-whitepaper/) 
we received feedback of a number of people.
The most constructive feedback was from Karst Koymans of the [University of Amsterdam](http://www.uva.nl/).
This, together with the other feedback has led to a version 2 of the white paper.

This version has the following differences with respect to version 1:

* A number of corrections;
* The NSEC3 example now returns three NSEC3 records in stead of two;
* Two figures are added;
* Empty non-terminals are explained (a little).

Version 2 of the white paper [can be found here](https://www.sidn.nl/fileadmin/docs/PDF-files_UK/wp-2011-0x01-v2.pdf). 
Or [here locally](/downloads/2012/wp-2011-0x01-v2.pdf).