DNS Privacy Requirements for Exchanges between Recursive Resolvers and Authoritative Servers
draft-ietf-dprive-phase2-requirements-00

Document Type Active Internet-Draft (dprive WG)
Last updated 2019-12-15
Replaces draft-lmo-dprive-phase2-requirements
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DPRIVE                                                      J. Livingood
Internet-Draft                                                   Comcast
Intended status: Informational                              A. Mayrhofer
Expires: June 16, 2020                                       nic.at GmbH
                                                           B. Overeinder
                                                              NLnet Labs
                                                       December 14, 2019

 DNS Privacy Requirements for Exchanges between Recursive Resolvers and
                         Authoritative Servers
                draft-ietf-dprive-phase2-requirements-00

Abstract

   This document provides requirements for adding confidentiality to DNS
   exchanges between recursive resolvers and authoritative servers.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on June 16, 2020.

Copyright Notice

   Copyright (c) 2019 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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction & Scope  . . . . . . . . . . . . . . . . . . . .   2
   2.  Document Work Via GitHub  . . . . . . . . . . . . . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Threat Model and Problem Statement  . . . . . . . . . . . . .   3
   5.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Mandatory Requirements  . . . . . . . . . . . . . . . . .   4
     5.2.  Optional Requirements . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  Changelog . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   9.  APPENDIX: Perspectives and Use Cases  . . . . . . . . . . . .   5
     9.1.  The User Perspective and Use Cases  . . . . . . . . . . .   6
     9.2.  The Operator Perspective and Use Cases  . . . . . . . . .   6
     9.3.  The Implementor / Software Vendor Perspective and Use
           Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     10.2.  Informative References . . . . . . . . . . . . . . . . .   9
     10.3.  URIs . . . . . . . . . . . . . . . . . . . . . . . . . .   9
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction & Scope

   The 2018 approved charter of the IETF DPRIVE Working Group [1]
   contains milestones related to confidentiality aspects of DNS
   transactions between the iterative resolver and authoritative name
   servers.

   This is also reflected in the DPRIVE milestones [2], which (as of
   October 2019) contains two relevant milestones:

      Develop requirements for adding confidentiality to DNS exchanges
      between recursive resolvers and authoritative servers (unpublished
      document).

      Investigate potential solutions for adding confidentiality to DNS
      exchanges involving authoritative servers (Experimental).

   This document intends to cover the first milestone for defining
   requirements for adding confidentiality to DNS exchanges between
   recursive resolvers and authoritative servers.  This may in turn lead

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   to progress in investigating, developing and standardizing potential
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