AES-CCM Elliptic Curve Cryptography (ECC) Cipher Suites for TLS
RFC 7251
| Document | Type |
RFC - Informational
(June 2014; No errata)
Was draft-mcgrew-tls-aes-ccm-ecc (individual in sec area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | Robert Cragie | ||
| Shepherd write-up | Show (last changed 2013-06-20) | ||
| IESG | IESG state | RFC 7251 (Informational) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Sean Turner | ||
| Send notices to | rdroms.ietf@gmail.com | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) D. McGrew
Request for Comments: 7251 Cisco Systems
Category: Informational D. Bailey
ISSN: 2070-1721 Ruhr-University Bochum
M. Campagna
R. Dugal
Certicom Corp.
June 2014
AES-CCM Elliptic Curve Cryptography (ECC) Cipher Suites for TLS
Abstract
This memo describes the use of the Advanced Encryption Standard (AES)
in the Counter and CBC-MAC Mode (CCM) of operation within Transport
Layer Security (TLS) to provide confidentiality and data-origin
authentication. The AES-CCM algorithm is amenable to compact
implementations, making it suitable for constrained environments,
while at the same time providing a high level of security. The
cipher suites defined in this document use Elliptic Curve
Cryptography (ECC) and are advantageous in networks with limited
bandwidth.
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/rfc7251.
McGrew, et al. Informational [Page 1]
RFC 7251 AES-CCM ECC TLS June 2014
Copyright Notice
Copyright (c) 2014 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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions Used in This Document . . . . . . . . . . . . 3
2. ECC-Based AES-CCM Cipher Suites . . . . . . . . . . . . . . . 3
2.1. AEAD Algorithms . . . . . . . . . . . . . . . . . . . . . 5
2.2. Requirements on Curves and Hashes . . . . . . . . . . . . 5
3. TLS Versions . . . . . . . . . . . . . . . . . . . . . . . . 5
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . 6
5.1. Perfect Forward Secrecy . . . . . . . . . . . . . . . . . 6
5.2. Counter Reuse . . . . . . . . . . . . . . . . . . . . . . 6
5.3. Hardware Security Modules . . . . . . . . . . . . . . . . 6
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1. Normative References . . . . . . . . . . . . . . . . . . 7
7.2. Informative References . . . . . . . . . . . . . . . . . 8
Appendix A. Recommended Curves and Algorithms . . . . . . . . . 9
McGrew, et al. Informational [Page 2]
RFC 7251 AES-CCM ECC TLS June 2014
1. Introduction
This document describes the use of Advanced Encryption Standard (AES)
[AES] in Counter with CBC-MAC Mode (CCM) [CCM] in several TLS cipher
suites. AES-CCM provides both authentication and confidentiality
(encryption and decryption) and uses as its only primitive the AES
encrypt block cipher operation. This makes it amenable to compact
implementations, which are advantageous in constrained environments.
Of course, adoption outside of constrained environments is necessary
to enable interoperability, such as that between web clients and
embedded servers, or between embedded clients and web servers. The
use of AES-CCM has been specified for the IPsec Encapsulating
Show full document text