NSEC5, DNSSEC Authenticated Denial of Existence
draft-vcelak-nsec5-04

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Last updated 2017-03-07
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Network Working Group                                          J. Vcelak
Internet-Draft                                                    CZ.NIC
Intended status: Standards Track                             S. Goldberg
Expires: September 08, 2017                            Boston University
                                                         D. Papadopoulos
                                                  University of Maryland
                                                                S. Huque
                                                              Salesforce
                                                             D. Lawrence
                                                     Akamai Technologies
                                                          March 07, 2017

            NSEC5, DNSSEC Authenticated Denial of Existence
                         draft-vcelak-nsec5-04

Abstract

   The Domain Name System Security Extensions (DNSSEC) introduced the
   NSEC resource record (RR) for authenticated denial of existence and
   the NSEC3 RR for hashed authenticated denial of existence.  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.

Status of This Memo

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   This Internet-Draft will expire on September 08, 2017.

Vcelak, et al.         Expires September 08, 2017               [Page 1]
Internet-Draft                    NSEC5                       March 2017

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   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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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  . . . . . . . . . . . . . . . .   8
     5.1.  NSEC5KEY RDATA Wire Format  . . . . . . . . . . . . . . .   8
     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 . . . . . . . . . . . . .  10
   7.  The NSEC5PROOF Resource Record  . . . . . . . . . . . . . . .  11
     7.1.  NSEC5PROOF RDATA Wire Format  . . . . . . . . . . . . . .  11
     7.2.  NSEC5PROOF RDATA Presentation Format  . . . . . . . . . .  11
   8.  Types of Authenticated Denial of Existence with NSEC5 . . . .  12
     8.1.  Name Error Responses  . . . . . . . . . . . . . . . . . .  12
     8.2.  No Data Responses . . . . . . . . . . . . . . . . . . . .  13
       8.2.1.  No Data Response, Opt-Out Not In Effect . . . . . . .  13
       8.2.2.  No Data Response, Opt-Out In Effect . . . . . . . . .  13
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