Elliptic Curve Cryptography (ECC) Brainpool Curves for Transport Layer Security (TLS)
RFC 7027
| Document | Type |
RFC - Informational
(October 2013; Errata)
Updates RFC 4492
Was draft-merkle-tls-brainpool (individual in sec area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | Dan Harkins | ||
| Shepherd write-up | Show (last changed 2013-06-20) | ||
| IESG | IESG state | RFC 7027 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Sean Turner | ||
| Send notices to | (None) | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) J. Merkle
Request for Comments: 7027 secunet Security Networks
Updates: 4492 M. Lochter
Category: Informational BSI
ISSN: 2070-1721 October 2013
Elliptic Curve Cryptography (ECC) Brainpool Curves
for Transport Layer Security (TLS)
Abstract
This document specifies the use of several Elliptic Curve
Cryptography (ECC) Brainpool curves for authentication and key
exchange in the Transport Layer Security (TLS) protocol.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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/rfc7027.
Copyright Notice
Copyright (c) 2013 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.
Merkle & Lochter Informational [Page 1]
RFC 7027 ECC Brainpool Curves for TLS October 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Brainpool NamedCurve Types . . . . . . . . . . . . . . . . . . 2
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. Normative References . . . . . . . . . . . . . . . . . . . 4
5.2. Informative References . . . . . . . . . . . . . . . . . . 4
Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . . 6
A.1. 256-Bit Curve . . . . . . . . . . . . . . . . . . . . . . . 7
A.2. 384-Bit Curve . . . . . . . . . . . . . . . . . . . . . . . 8
A.3. 512-Bit Curve . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
[RFC5639] specifies a new set of elliptic curve groups over finite
prime fields for use in cryptographic applications. These groups,
denoted as ECC Brainpool curves, were generated in a verifiably
pseudo-random way and comply with the security requirements of
relevant standards from ISO [ISO1] [ISO2], ANSI [ANSI1], NIST [FIPS],
and SecG [SEC2].
[RFC4492] defines the usage of elliptic curves for authentication and
key agreement in TLS 1.0 and TLS 1.1; these mechanisms may also be
used with TLS 1.2 [RFC5246]. While the ASN.1 object identifiers
defined in [RFC5639] already allow usage of the ECC Brainpool curves
for TLS (client or server) authentication through reference in X.509
certificates according to [RFC3279] and [RFC5480], their negotiation
for key exchange according to [RFC4492] requires the definition and
assignment of additional NamedCurve IDs. This document specifies
such values for three curves from [RFC5639].
2. Brainpool NamedCurve Types
According to [RFC4492], the name space NamedCurve is used for the
negotiation of elliptic curve groups for key exchange during a
handshake starting a new TLS session. This document adds new
NamedCurve types to three elliptic curves defined in [RFC5639] as
follows:
enum {
brainpoolP256r1(26),
brainpoolP384r1(27),
brainpoolP512r1(28)
} NamedCurve;
These curves are suitable for use with Datagram TLS [RFC6347].
Merkle & Lochter Informational [Page 2]
RFC 7027 ECC Brainpool Curves for TLS October 2013
Test vectors for a Diffie-Hellman key exchange using these elliptic
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