< draft-merkle-tls-brainpool-02.txt		draft-merkle-tls-brainpool-03.txt >
	Network Working Group J. Merkle		Network Working Group J. Merkle
	Internet-Draft secunet Security Networks		Internet-Draft secunet Security Networks
	Updates: 4492 (if approved) M. Lochter		Updates: 4492 (if approved) M. Lochter
	Intended status: Informational Bundesamt fuer Sicherheit in der		Intended status: Informational Bundesamt fuer Sicherheit in der
	Expires: December 26, 2013 Informationstechnik (BSI)		Expires: January 3, 2014 Informationstechnik (BSI)
	June 24, 2013		July 2, 2013
	ECC Brainpool Curves for Transport Layer Security (TLS)		ECC Brainpool Curves for Transport Layer Security (TLS)
	draft-merkle-tls-brainpool-02		draft-merkle-tls-brainpool-03
	Abstract		Abstract
	This document specifies the use of several ECC Brainpool curves for		This document specifies the use of several ECC Brainpool curves for
	authentication and key exchange in the Transport Layer Security (TLS)		authentication and key exchange in the Transport Layer Security (TLS)
	protocol.		protocol.
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	skipping to change at page 1, line 34 ¶		skipping to change at page 1, line 34 ¶
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at http://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on December 26, 2013.		This Internet-Draft will expire on January 3, 2014.
	Copyright Notice		Copyright Notice
	Copyright (c) 2013 IETF Trust and the persons identified as the		Copyright (c) 2013 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 3, line 14 ¶		skipping to change at page 3, line 14 ¶
	1. Introduction		1. Introduction
	In [RFC5639], a new set of elliptic curve groups over finite prime		In [RFC5639], a new set of elliptic curve groups over finite prime
	fields for use in cryptographic applications was specified. These		fields for use in cryptographic applications was specified. These
	groups, denoted as ECC Brainpool curves, were generated in a		groups, denoted as ECC Brainpool curves, were generated in a
	verifiably pseudo-random way and comply with the security		verifiably pseudo-random way and comply with the security
	requirements of relevant standards from ISO [ISO1] [ISO2], ANSI		requirements of relevant standards from ISO [ISO1] [ISO2], ANSI
	[ANSI1], NIST [FIPS], and SecG [SEC2].		[ANSI1], NIST [FIPS], and SecG [SEC2].
	Usage of elliptic curves for authentication and key agreement in TLS		[RFC4492] defines the usage of elliptic curves for authentication and
	1.0 and TLS 1.1 is defined in [RFC4492]. While the ASN.1 object		key agreement in TLS 1.0 and TLS 1.1, and these mechanisms are also
	identifiers defined in [RFC5639] already allow usage of the ECC		applicable to TLS 1.2 [RFC5246]. While the ASN.1 object identifiers
	Brainpool curves for TLS (client or server) authentication through		defined in [RFC5639] already allow usage of the ECC Brainpool curves
	reference in X.509 certificates according to [RFC3279] and [RFC5480]		for TLS (client or server) authentication through reference in X.509
	, their negotiation for key exchange according to [RFC4492] requires		certificates according to [RFC3279] and [RFC5480] , their negotiation
	the definition and assignment of additional NamedCurve IDs. This		for key exchange according to [RFC4492] requires the definition and
	document specifies such values for three curves from [RFC5639].		assignment of additional NamedCurve IDs. This document specifies
			such values for three curves from [RFC5639].
	Test vectors for a Diffie-Hellman key exchange using these ECC		Test vectors for a Diffie-Hellman key exchange using these ECC
	Brainpool curves are provided in Appendix A		Brainpool curves are provided in Appendix A
	2. Security Considerations		2. Security Considerations
	The security considerations of [RFC5246] apply accordingly.		The security considerations of [RFC5246] apply accordingly.
	The confidentiality, authenticity and integrity of the TLS		The confidentiality, authenticity and integrity of the TLS
	communication is limited by the weakest cryptographic primitive		communication is limited by the weakest cryptographic primitive
	skipping to change at page 5, line 9 ¶		skipping to change at page 5, line 9 ¶
	random curve (through mathematical equivalence), an arithmetic based		random curve (through mathematical equivalence), an arithmetic based
	on small curve parameters may be harder to protect against side-		on small curve parameters may be harder to protect against side-
	channel attacks. General guidance on resistence of elliptic curve		channel attacks. General guidance on resistence of elliptic curve
	cryptography implementations against side-channel-attacks is given in		cryptography implementations against side-channel-attacks is given in
	[BSI1] and [HMV].		[BSI1] and [HMV].
	3. IANA Considerations		3. IANA Considerations
	IANA is requested to assign numbers for the ECC Brainpool curves,		IANA is requested to assign numbers for the ECC Brainpool curves,
	defined in [RFC5639], found in Table 1 in the Transport Layer		defined in [RFC5639], found in Table 1 in the Transport Layer
	Security (TLS) Parameters NamedCurve registry [IANA-TLS]. These		Security (TLS) Parameters registry EC Named Curve [IANA-TLS]. These
	curves are suitability for use with DTLS.		curves are suitable for use with DTLS.
	+-------+-----------------+---------+-----------+		+-------+-----------------+---------+-----------+
	| Value | Description | DTLS-OK | Reference |		| Value | Description | DTLS-OK | Reference |
	+-------+-----------------+---------+-----------+		+-------+-----------------+---------+-----------+
	| TBD1 | brainpoolP256r1 | Y | This doc |		| TBD1 | brainpoolP256r1 | Y | This doc |
	| | | | |		| | | | |
	| TBD2 | brainpoolP384r1 | Y | This doc |		| TBD2 | brainpoolP384r1 | Y | This doc |
	| | | | |		| | | | |
	| TBD3 | brainpoolP512r1 | Y | This doc |		| TBD3 | brainpoolP512r1 | Y | This doc |
	+-------+-----------------+---------+-----------+		+-------+-----------------+---------+-----------+
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