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Signaling Trust Anchor Knowledge in DNS Security Extensions (DNSSEC) (RFC8145) Disclosure Number: IPCOM000249827D
Original Publication Date: 2017-Apr-01
Included in the Prior Art Database: 2017-Apr-12
Document File: 26 page(s) / 27K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Wessels: AUTHOR [+3]


The DNS Security Extensions (DNSSEC) [RFC4033] [RFC4034] [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 resource record (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.

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Internet Engineering Task Force (IETF)                        D. Wessels Request for Comments: 8145                                      Verisign Category: Standards Track                                      W. Kumari ISSN: 2070-1721                                                   Google                                                               P. Hoffman                                                                    ICANN                                                               April 2017

   Signaling Trust Anchor Knowledge in DNS Security Extensions (DNSSEC)


   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 two different    ways for validating resolvers to signal to a server which keys are    referenced in their chain of trust.  The data from such signaling    allow zone administrators to monitor the progress of rollovers in a    DNSSEC-signed zone.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Wessels, et al.              Standards Track                    [Page 1]
 RFC 8145                DNSSEC Key Tag Signaling              April 2017

 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    ( 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    the Trust Le...