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Re: [Cfrg] ISE seeks help with some crypto drafts

John Mattsson <john.mattsson@ericsson.com> Sat, 09 March 2019 00:11 UTC

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From: John Mattsson <john.mattsson@ericsson.com>
To: David Wong <davidwong.crypto@gmail.com>, "Salz, Rich" <rsalz@akamai.com>
CC: "sec-ads@ietf.org" <sec-ads@ietf.org>, "cfrg@irtf.org" <cfrg@irtf.org>, "rfc-ise@rfc-editor.org" <rfc-ise@rfc-editor.org>, "secdir@ietf.org" <secdir@ietf.org>
Thread-Topic: [Cfrg] ISE seeks help with some crypto drafts
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Date: Sat, 09 Mar 2019 00:11:03 +0000
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Subject: Re: [Cfrg] ISE seeks help with some crypto drafts
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Given that CFRG has already published OCB3 in RFC 7253, which was recently included in the CEASAR final portfolio, I would like to see the OCB3 wideblock draft published somewhere. I agree with Rich that it would be better to replace RFC 7523.

Reading RFC 7523 again, it does not feel optimal that the two slightly different modes defined in RFC 7523 and the FSE 2011 paper are both called OCB3.

The OCB wideblock document seems to meet the requirements in RFC 4846.

/John

-----Original Message-----
From: Cfrg <cfrg-bounces@irtf.org> on behalf of David Wong <davidwong.crypto@gmail.com>
Date: Friday, 8 March 2019 at 19:11
To: "Salz, Rich" <rsalz@akamai.com>
Cc: "sec-ads@ietf.org" <sec-ads@ietf.org>, "cfrg@irtf.org" <cfrg@irtf.org>, "rfc-ise@rfc-editor.org" <rfc-ise@rfc-editor.org>, "secdir@ietf.org" <secdir@ietf.org>
Subject: Re: [Cfrg] ISE seeks help with some crypto drafts

Note that OCB was chose as a finalist in the CAESAR competition. Knowing that, it sounds like a good idea to standardize it.

On the other hand, if I understand correctly you need to pay a one-time fee to use the algorithm in a commercial product? I think that’s a big no-no considering we want everybody to use good open source libraries.

David

> On Mar 8, 2019, at 9:56 AM, Salz, Rich <rsalz@akamai.com> wrote:
> 
>    https://datatracker.ietf.org/doc/draft-krovetz-ocb-wideblock/
> 
> I would rather see this rewritten to completely replace 7523 (and include its test vectors of course)  Would review.
> 
>    https://datatracker.ietf.org/doc/draft-krovetz-rc6-rc5-vectors/
> 
> I don't see a compelling need for this, but I am not strongly opposed either.
> 
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> Cfrg@irtf.org
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