AES-CCM ECC Cipher Suites for TLS
draft-mcgrew-tls-aes-ccm-ecc-07

TLS Working Group                                              D. McGrew
Internet-Draft                                             Cisco Systems
Intended status: Informational                                 D. Bailey
Expires: January 13, 2014                                        RSA/EMC
                                                             M. Campagna
                                                                R. Dugal
                                                          Certicom Corp.
                                                           July 12, 2013

                   AES-CCM ECC Cipher Suites for TLS
                    draft-mcgrew-tls-aes-ccm-ecc-07

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

Status of this Memo

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   This Internet-Draft will expire on January 13, 2014.

Copyright Notice

   Copyright (c) 2013 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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   (http://trustee.ietf.org/license-info) in effect on the date of
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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 . . . . . . . . . . . . . . . . . . . . 6
     6.1.  Perfect Forward Secrecy . . . . . . . . . . . . . . . . . . 7
     6.2.  Counter Reuse . . . . . . . . . . . . . . . . . . . . . . . 7

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

   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . . . 7
     8.2.  Informative References  . . . . . . . . . . . . . . . . . . 8

   Appendix A.  Recommended Curves and Algorithms  . . . . . . . . . . 8

   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 9

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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
   environments is necessary to enable interoperability, such as that
   between web clients and embedded servers, or between embedded clients