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Re: [TLS] I-D Action: draft-ietf-tls-ecdhe-psk-aead-00.txt

<g_e_montenegro@yahoo.com> Sun, 10 July 2016 07:37 UTC

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Date: Sun, 10 Jul 2016 07:36:59 +0000
From: g_e_montenegro@yahoo.com
To: "draft-ietf-tls-ecdhe-psk-aead@tools.ietf.org" <draft-ietf-tls-ecdhe-psk-aead@tools.ietf.org>, "draft-ietf-dice-profile@tools.ietf.org" <draft-ietf-dice-profile@tools.ietf.org>
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Subject: Re: [TLS] I-D Action: draft-ietf-tls-ecdhe-psk-aead-00.txt
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Hi,
I'm curious as to the relationship between this TLS WG draft and the DICE profile for IoT (currently in Auth48):https://tools.ietf.org/html/draft-ietf-dice-profile

The dice profile uses two TLS ciphershuites
TLS_PSK_WITH_AES_128_CCM_8             (defined in https://tools.ietf.org/html/rfc6655)
TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8     (defined in https://tools.ietf.org/html/rfc7251)

Notice that the DICE profile defines nothing (it has no IANA considerations). Instead, it reuses definitions established previously per the references above.
This draft-ietf-tls-ecdhe-psk-aeak  claims to also define IoT-friendly ciphersuites, for example, TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256 
However, it does not reference the DICE profile draft. 
What is the difference between these?
thanks,
Gabriel  

    On Friday, May 27, 2016 10:19 AM, "internet-drafts@ietf.org" <internet-drafts@ietf.org> wrote:
 
 

 
A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Transport Layer Security of the IETF.

        Title          : ECDHE_PSK with AES-GCM and AES-CCM Cipher Suites for Transport Layer Security (TLS)
        Authors        : John Mattsson
                          Daniel Migault
    Filename        : draft-ietf-tls-ecdhe-psk-aead-00.txt
    Pages          : 7
    Date            : 2016-05-27

Abstract:
  This document defines several new cipher suites for the Transport
  Layer Security (TLS) protocol.  The cipher suites are all based on
  the Ephemeral Elliptic Curve Diffie-Hellman with Pre-Shared Key
  (ECDHE_PSK) key exchange together with the Authenticated Encryption
  with Associated Data (AEAD) algorithms AES-GCM and AES-CCM.  PSK
  provides light and efficient authentication, ECDHE provides perfect
  forward secrecy, and AES-GCM and AES-CCM provides encryption and
  integrity protection.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-tls-ecdhe-psk-aead/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-tls-ecdhe-psk-aead-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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