The DNS-Based Authentication of Named Entities (DANE) Transport Layer Security (TLS) Protocol: TLSA
RFC 6698
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Type |
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RFC - Proposed Standard
(August 2012; Errata)
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Last updated |
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2015-10-14
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Stream |
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IETF
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plain text
pdf
html
bibtex
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WG state
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WG Consensus: Waiting for Write-Up
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Document shepherd |
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Warren Kumari
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| IESG |
IESG state |
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RFC 6698 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Stephen Farrell
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IESG note |
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Warren Kumari (warren@kumari.net) is acting as the Document Shepherd.
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Send notices to |
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(None)
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Internet Engineering Task Force (IETF) P. Hoffman
Request for Comments: 6698 VPN Consortium
Category: Standards Track J. Schlyter
ISSN: 2070-1721 Kirei AB
August 2012
The DNS-Based Authentication of Named Entities (DANE)
Transport Layer Security (TLS) Protocol: TLSA
Abstract
Encrypted communication on the Internet often uses Transport Layer
Security (TLS), which depends on third parties to certify the keys
used. This document improves on that situation by enabling the
administrators of domain names to specify the keys used in that
domain's TLS servers. This requires matching improvements in TLS
client software, but no change in TLS server software.
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 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6698.
Copyright Notice
Copyright (c) 2012 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
(http://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
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Hoffman & Schlyter Standards Track [Page 1]
RFC 6698 DNS-Based Authentication for TLS August 2012
Table of Contents
1. Introduction ....................................................3
1.1. Background and Motivation ..................................3
1.2. Securing the Association of a Domain Name with a
Server's Certificate .......................................4
1.3. Method for Securing Certificate Associations ...............5
1.4. Terminology ................................................6
2. The TLSA Resource Record ........................................7
2.1. TLSA RDATA Wire Format .....................................7
2.1.1. The Certificate Usage Field .........................7
2.1.2. The Selector Field ..................................8
2.1.3. The Matching Type Field .............................9
2.1.4. The Certificate Association Data Field ..............9
2.2. TLSA RR Presentation Format ................................9
2.3. TLSA RR Examples ..........................................10
3. Domain Names for TLSA Certificate Associations .................10
4. Use of TLSA Records in TLS .....................................11
4.1. Usable Certificate Associations ...........................11
5. TLSA and DANE Use Cases and Requirements .......................13
6. Mandatory-to-Implement Features ................................15
7. IANA Considerations ............................................15
7.1. TLSA RRtype ...............................................15
7.2. TLSA Certificate Usages ...................................15
7.3. TLSA Selectors ............................................16
7.4. TLSA Matching Types .......................................16
8. Security Considerations ........................................16
8.1. Comparing DANE to Public CAs ..............................18
8.1.1. Risk of Key Compromise .............................19
8.1.2. Impact of Key Compromise ...........................20
8.1.3. Detection of Key Compromise ........................20
8.1.4. Spoofing Hostnames .................................20
8.2. DNS Caching ...............................................21
8.3. External DNSSEC Validators ................................21
9. Acknowledgements ...............................................22
10. References ....................................................22
10.1. Normative References .....................................22
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