[rfc-dist] RFC 7129 on Authenticated Denial of Existence in the DNS

rfc-editor at rfc-editor.org rfc-editor at rfc-editor.org
Wed Feb 12 20:49:21 PST 2014

A new Request for Comments is now available in online RFC libraries.

        RFC 7129

        Title:      Authenticated Denial of Existence in the DNS 
        Author:     R. Gieben, W. Mekking
        Status:     Informational
        Stream:     Independent
        Date:       February 2014
        Mailbox:    miek at google.com, 
                    matthijs at nlnetlabs.nl
        Pages:      30
        Characters: 62936
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-gieben-auth-denial-of-existence-dns-05.txt

        URL:        http://www.rfc-editor.org/rfc/rfc7129.txt

Authenticated denial of existence allows a resolver to validate that
a certain domain name does not exist.  It is also used to signal that
a domain name exists but does not have the specific resource record
(RR) type you were asking for.  When returning a negative DNS
Security Extensions (DNSSEC) response, a name server usually includes
up to two NSEC records.  With NSEC version 3 (NSEC3), this amount is

This document provides additional background commentary and some
context for the NSEC and NSEC3 mechanisms used by DNSSEC to provide
authenticated denial-of-existence responses.

INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.

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