ECC Brainpool Curves for Transport Layer Security (TLS) Version 1.3
draft-bruckert-brainpool-for-tls13-06
Network Working Group L. Bruckert
Internet-Draft J. Merkle
Intended status: Informational secunet Security Networks
Expires: March 5, 2020 M. Lochter
BSI
September 2, 2019
ECC Brainpool Curves for Transport Layer Security (TLS) Version 1.3
draft-bruckert-brainpool-for-tls13-06
Abstract
ECC Brainpool curves were an option for authentication and key
exchange in the Transport Layer Security (TLS) protocol version 1.2,
but were deprecated by the IETF for use with TLS version 1.3 because
they had little usage. However, these curves have not been shown to
have significant cryptographical weaknesses, and there is some
interest in using several of these curves in TLS 1.3.
This document provides the necessary protocol mechanisms for using
ECC Brainpool curves in TLS 1.3. This approach is not endorsed by
the IETF.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on March 5, 2020.
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document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Terminology . . . . . . . . . . . . . . . . . . 3
3. Brainpool NamedGroup Types . . . . . . . . . . . . . . . . . 3
4. Brainpool SignatureScheme Types . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Security Considerations . . . . . . . . . . . . . . . . . . . 4
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . 6
Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . 8
A.1. 256 Bit Curve . . . . . . . . . . . . . . . . . . . . . . 8
A.2. 384 Bit Curve . . . . . . . . . . . . . . . . . . . . . . 9
A.3. 512 Bit Curve . . . . . . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
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].
[RFC8422] defines the usage of elliptic curves for authentication and
key agreement in TLS 1.2 and earlier versions, and [RFC7027] defines
the usage of the ECC Brainpool curves for authentication and key
exchange in TLS. The latter is applicable to TLS 1.2 and earlier
versions, but not to TLS 1.3 that deprecates the ECC Brainpool Curve
IDs defined in [RFC7027] due to the lack of widespread deployment
However, there is some interest in using these curves in TLS 1.3.
The negotiation of ECC Brainpool Curves for key exchange in TLS 1.3
according to [RFC8446] requires the definition and assignment of
additional NamedGroup IDs. This document provides the necessary
definition and assignment of additional SignatureScheme IDs for using
three ECC Brainpool Curves from [RFC5639].
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