Re: [lamps] I-D Action: draft-ietf-lamps-cms-mix-with-psk-03.txt

This document puts the PSK into the KDF in a slightly different way.  The change is more compatible with 'SuppPrivInfo' in the NIST key management documents.

This document includes examples in two new appendices.

PLEASE REVIEW.

Russ

> On Mar 8, 2019, at 10:43 PM, 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 Limited Additional Mechanisms for PKIX and SMIME WG of the IETF.
> 
>        Title           : Using Pre-Shared Key (PSK) in the Cryptographic Message Syntax (CMS)
>        Author          : Russ Housley
> 	Filename        : draft-ietf-lamps-cms-mix-with-psk-03.txt
> 	Pages           : 29
> 	Date            : 2019-03-08
> 
> Abstract:
>   The invention of a large-scale quantum computer would pose a serious
>   challenge for the cryptographic algorithms that are widely deployed
>   today.  The Cryptographic Message Syntax (CMS) supports key transport
>   and key agreement algorithms that could be broken by the invention of
>   such a quantum computer.  By storing communications that are
>   protected with the CMS today, someone could decrypt them in the
>   future when a large-scale quantum computer becomes available.  Once
>   quantum-secure key management algorithms are available, the CMS will
>   be extended to support the new algorithms, if the existing syntax
>   does not accommodate them.  In the near-term, this document describes
>   a mechanism to protect today's communication from the future
>   invention of a large-scale quantum computer by mixing the output of
>   key transport and key agreement algorithms with a pre-shared key.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-lamps-cms-mix-with-psk/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-lamps-cms-mix-with-psk-03
> https://datatracker.ietf.org/doc/html/draft-ietf-lamps-cms-mix-with-psk-03
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-lamps-cms-mix-with-psk-03
> 
> 
> 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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