NSEC5, DNSSEC Authenticated Denial of Existence
draft-vcelak-nsec5-05

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Last updated 2017-07-03
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Network Working Group                                          J. Vcelak
Internet-Draft                                                    CZ.NIC
Intended status: Standards Track                             S. Goldberg
Expires: January 04, 2018                              Boston University
                                                         D. Papadopoulos
                                                  University of Maryland
                                                                S. Huque
                                                              Salesforce
                                                             D. Lawrence
                                                     Akamai Technologies
                                                           July 03, 2017

            NSEC5, DNSSEC Authenticated Denial of Existence
                         draft-vcelak-nsec5-05

Abstract

   The Domain Name System Security Extensions (DNSSEC) introduced two
   resource records (RR) for authenticated denial of existence: the NSEC
   RR and the NSEC3 RR.  This document introduces NSEC5 as an
   alternative mechanism for DNSSEC authenticated denial of existence.
   NSEC5 uses verifiable random functions (VRFs) to prevent offline
   enumeration of zone contents.  NSEC5 also protects the integrity of
   the zone contents even if an adversary compromises one of the
   authoritative servers for the zone.  Integrity is preserved because
   NSEC5 does not require private zone-signing keys to be present on all
   authoritative servers for the zone, in contrast to DNSSEC online
   signing schemes like NSEC3 White Lies.

Ed note

   Text inside square brackets ([]) is additional background
   information, answers to frequently asked questions, general musings,
   etc.  They will be removed before publication.  This document is
   being collaborated on in GitHub at <https://github.com/fcelda/
   nsec5-draft>.  The most recent version of the document, open issues,
   etc should all be available here.  The authors gratefully accept pull
   requests.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

Vcelak, et al.          Expires January 04, 2018                [Page 1]
Internet-Draft                    NSEC5                        July 2017

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Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Rationale . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements  . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
   2.  Backward Compatibility  . . . . . . . . . . . . . . . . . . .   6
   3.  How NSEC5 Works . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  NSEC5 Algorithms  . . . . . . . . . . . . . . . . . . . . . .   8
   5.  The NSEC5KEY Resource Record  . . . . . . . . . . . . . . . .   9
     5.1.  NSEC5KEY RDATA Wire Format  . . . . . . . . . . . . . . .   9
     5.2.  NSEC5KEY RDATA Presentation Format  . . . . . . . . . . .   9
   6.  The NSEC5 Resource Record . . . . . . . . . . . . . . . . . .   9
     6.1.  NSEC5 RDATA Wire Format . . . . . . . . . . . . . . . . .   9
     6.2.  NSEC5 Flags Field . . . . . . . . . . . . . . . . . . . .  10
     6.3.  NSEC5 RDATA Presentation Format . . . . . . . . . . . . .  11
   7.  The NSEC5PROOF Resource Record  . . . . . . . . . . . . . . .  11
     7.1.  NSEC5PROOF RDATA Wire Format  . . . . . . . . . . . . . .  11
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