Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]

Gunnar Wolf <gwolf@gwolf.org> Tue, 02 June 2015 01:46 UTC

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Date: Mon, 1 Jun 2015 20:46:53 -0500
From: Gunnar Wolf <gwolf@gwolf.org>
To: Aaron Zauner <azet@azet.org>
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Cc: Phillip Rogaway <rogaway@cs.ucdavis.edu>, TLS Mailing List <tls@ietf.org>, Charanjit Jutla <csjutla@us.ibm.com>
Subject: Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]
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Aaron Zauner dijo [Mon, Jun 01, 2015 at 02:37:16PM +0200]:
> >      * I'd also like to get rid of ECDSA ciphersuites alltogether, ideally
> >        leaving a few real-world, high-performance ciphersuites to use
> > 
> > 
> > I don't understand this point: ECDSA cipher suites are the ones with the
> > best performance at present.
> > 
> 
> Firstly, as far as I know it's also quite difficult to get ECDSA
> certificates in the wild. Has this changed significantly over the past
> couple of months? Second - there's a current draft on EdDSA, which I'd
> prefer over ECDSA, if somehow possible. I'm more about minimizing the
> list of cipher-suites this draft introduces than to point out that I
> dislike a particular signature schemes.

I'd venture to say that's a consequence of them having been around
much less time than the other schemes; not only have had crypto
libraries to gain widespread support for them to be interoperable
enough, but also the involved individuals/companies (mostly thinking
about CAs.