A Sentinel for Detecting Trusted Keys in DNSSEC
draft-huston-kskroll-sentinel-01

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DNSOP                                                          G. Huston
Internet-Draft                                                  J. Damas
Intended status: Standards Track                                   APNIC
Expires: April 11, 2018                                        W. Kumari
                                                                  Google
                                                         October 8, 2017

            A Sentinel for Detecting Trusted Keys in DNSSEC
                  draft-huston-kskroll-sentinel-01.txt

Abstract

   The DNS Security Extensions (DNSSEC) were developed to provide origin
   authentication and integrity protection for DNS data by using digital
   signatures.  These digital signatures can be verified by building a
   chain of trust starting from a trust anchor and proceeding down to a
   particular node in the DNS.  This document specifies a mechanism that
   will allow an end user to determine the trusted key state of the
   resolvers that handle the user's DNS queries.

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
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   This Internet-Draft will expire on April 11, 2018.

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
   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

Huston, et al.           Expires April 11, 2018                 [Page 1]
Internet-Draft         DNSSEC Trusted Key Sentinel          October 2017

   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Sentinel Mechanism  . . . . . . . . . . . . . . . . . . . . .   3
   3.  Sentinel Processing . . . . . . . . . . . . . . . . . . . . .   4
   4.  Sentinel Test Result Considerations . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   The DNS Security Extensions (DNSSEC) [RFC4033], [RFC4034] and
   [RFC4035] were developed to provide origin authentication and
   integrity protection for DNS data by using digital signatures.
   DNSSEC uses Key Tags to efficiently match signatures to the keys from
   which they are generated.  The Key Tag is a 16-bit value computed
   from the RDATA portion of a DNSKEY RR using a formula not unlike a
   ones-complement checksum.  RRSIG RRs contain a Key Tag field whose
   value is equal to the Key Tag of the DNSKEY RR that validates the
   signature.

   This document specifies how validating resolvers can respond to
   certain queries in a manner that allows a querier to deduce whether a
   particular key has been loaded into that resolver's trusted key
   store.  In particular, this response mechanism can be used to
   determine whether a certain Root Zone KSK is ready to be used as a
   trusted key within the context of a key roll by this resolver.

   This new mechanism is OPTIONAL to implement and use, although for
   reasons of supporting broad-based measurement techniques, it is
   strongly preferred if configurations of DNSSEC-validating resolvers
   enabled this mechanism by default, allowing for configuration
   directives to disable this mechanism if desired.
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