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AES-CCM ECC Cipher Suites for TLS
draft-mcgrew-tls-aes-ccm-ecc-08

Document type: Active Internet-Draft (individual in sec area)
Document stream: IETF
Last updated: 2014-04-07 (latest revision 2014-02-12)
Intended RFC status: Informational
Other versions: plain text, xml, pdf, html

IETF State: (None)
Consensus: Yes
Document shepherd: Robert Cragie
Shepherd Write-Up: Last changed 2013-06-20

IESG State: RFC Ed Queue
IANA Action State: RFC-Ed-Ack
RFC Editor State: EDIT
Responsible AD: Sean Turner
Send notices to: mcgrew@cisco.com, dbailey@rsa.com, mcampagna@certicom.com, rdugal@certicom.com, draft-mcgrew-tls-aes-ccm-ecc@tools.ietf.org, robert.cragie@gridmerge.com, rdroms.ietf@gmail.com

TLS Working Group                                              D. McGrew
Internet-Draft                                             Cisco Systems
Intended status: Informational                                 D. Bailey
Expires: August 16, 2014                                         RSA/EMC
                                                             M. Campagna
                                                                R. Dugal
                                                          Certicom Corp.
                                                       February 12, 2014

                   AES-CCM ECC Cipher Suites for TLS
                    draft-mcgrew-tls-aes-ccm-ecc-08

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
   ciphersuites defined in this document use Elliptic Curve Cryptography
   (ECC), and are advantageous in networks with limited bandwidth.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 16, 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

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Internet-Draft               AES-CCM ECC TLS               February 2014

   (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.  History  . . . . . . . . . . . . . . . . . . . . . . . . . . .  6

   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  6

   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  7
     6.1.  Perfect Forward Secrecy  . . . . . . . . . . . . . . . . .  7
     6.2.  Counter Reuse  . . . . . . . . . . . . . . . . . . . . . .  7
     6.3.  Hardware Security Modules  . . . . . . . . . . . . . . . .  7

   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  7

   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     8.1.  Normative References . . . . . . . . . . . . . . . . . . .  8
     8.2.  Informative References . . . . . . . . . . . . . . . . . .  9

   Appendix A.  Recommended Curves and Algorithms . . . . . . . . . .  9

   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10

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1.  Introduction

   This document describes the use of Advanced Encryption Standard (AES)
   [AES] in Counter with CBC-MAC Mode (CCM) [CCM] in several TLS
   ciphersuites.  AES-CCM provides both authentication and
   confidentiality and uses as its only primitive the AES encrypt
   operation (the AES decrypt operation is not needed).  This makes it
   amenable to compact implementations, which is advantageous in
   constrained environments.  Of course, adoption outside of constrained

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