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)
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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 Security Payload (ESP) [RFC4309] and 802.15.4 wireless networks [IEEE802154]. Authenticated encryption, in addition to providing confidentialityShow full document text