Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd
"Dan Harkins" <dharkins@lounge.org> Thu, 05 December 2013 17:15 UTC
Return-Path: <dharkins@lounge.org>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9F9201AE122 for <tls@ietfa.amsl.com>; Thu, 5 Dec 2013 09:15:34 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.867
X-Spam-Level:
X-Spam-Status: No, score=-3.867 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, IP_NOT_FRIENDLY=0.334, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e6C6Iulb8ErZ for <tls@ietfa.amsl.com>; Thu, 5 Dec 2013 09:15:31 -0800 (PST)
Received: from colo.trepanning.net (colo.trepanning.net [69.55.226.174]) by ietfa.amsl.com (Postfix) with ESMTP id D46911AE111 for <tls@ietf.org>; Thu, 5 Dec 2013 09:15:31 -0800 (PST)
Received: from www.trepanning.net (localhost [127.0.0.1]) by colo.trepanning.net (Postfix) with ESMTP id 6504B1022404C; Thu, 5 Dec 2013 09:15:28 -0800 (PST)
Received: from 69.12.173.8 (SquirrelMail authenticated user dharkins@lounge.org) by www.trepanning.net with HTTP; Thu, 5 Dec 2013 09:15:28 -0800 (PST)
Message-ID: <6c129fd89a9e5953ba844e4e1d1e6e98.squirrel@www.trepanning.net>
In-Reply-To: <CADMpkcKTAARYK2id27T44eVyx6gF24mkt9nAkUZbSmwtEtd2gg@mail.gmail.com>
References: <3065D910-832C-47B6-9E0B-2F8DCD2657D2@cisco.com> <529C990D.3020608@gmail.com> <CACsn0cmtP_dF7N2op4DZUwR8t-fW30GmtdqQoteZ+9Y0oH3dUg@mail.gmail.com> <a4b1729af4966e99df1582943f02a0a8.squirrel@www.trepanning.net> <CACsn0cksrU2GErd6FkZPkXKXK4pSJhTbBoJ-0C-14jsM=UY2iQ@mail.gmail.com> <14e67efee74d2ec6d535f6750ed829db.squirrel@www.trepanning.net> <CACsn0c=PnB2CA8rpNtcOp6RRLNWHEPN-aN+AdWSF7FJM2wZOog@mail.gmail.com> <6d86c3be1741ed14992ec8662e0d32c7.squirrel@www.trepanning.net> <CADMpkcKTAARYK2id27T44eVyx6gF24mkt9nAkUZbSmwtEtd2gg@mail.gmail.com>
Date: Thu, 05 Dec 2013 09:15:28 -0800
From: Dan Harkins <dharkins@lounge.org>
To: Bodo Moeller <bmoeller@acm.org>
User-Agent: SquirrelMail/1.4.14 [SVN]
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 8bit
X-Priority: 3 (Normal)
Importance: Normal
Cc: "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 05 Dec 2013 17:15:34 -0000
On Thu, December 5, 2013 3:48 am, Bodo Moeller wrote: > Dan Harkins <dharkins@lounge.org>: > > The exchange was reviewed by the CFRG with, as Joe noted, satisfactory >> results. > > > While it is true that Joe noted that, I think the point of the present > discussion is that the protocol wasn't actually reviewed by the CFRG with > satisfactory results. No, that's not really true. There is a difference between "your protocol has not been proven secure" and "your protocol has a security flaw". And while the former has been pointed out on this list and the CFRG list, the later has not. You have pointed out an issue with using an in-band server-provided domain parameter set and I'm going to address that in a subsequent version. That's not really a flaw in the key exchange, it's how the key exchange has been inserted into TLS and it can be addressed by some text rewrite. I am genuinely thankful for your comment and I will address it in a subsequent version. The present discussion on the list boils down to these subjects: 1) there's no security proof and that is unacceptable (Rene, Watson) 2) there's nothing special about this protocol so why don't you (being me) spend your time working on something else that we (Rene, Watson) think is better. 3) the TLS-pwd benefits and your use cases are not compelling to me (Trevor). The response to #1 is that security proofs have never been required and we have standards-track protocols today that are susceptible to offline dictionary attack (every PSK cipher suite). So it's an appeal to a process that does not exist. The response to #2 is that lack of implementation of these other protocols has been hampered by patents and TLS-pwd is not patented (and the underlying dragonfly key exchange is not patented either). Theoretically I think there are some elegant alternatives to TLS-pwd but practically I don't think there are. Regardless though, there is nothing stopping Rene and/or Watson from doing any work on any other protocol they think should be advanced. Since I am not their slave^H^H^H^H^Hgrad student I do not feel compelled to throw away my work and write papers and wait years as has been suggested. (The little uptake in PAKE protocols in the IETF in the recent years is the result of people following me around from EMU to IPsecme and now to TLS and after I do the leg work and present a dragonfly-style exchange someone else comes along and says "hey, me too"). The response to #3 is: so? There is rarely uniformity in viewpoints as everyone's experience is different. Now there's a choice and if the benefits of one are not compelling then be happy you can choose the other. To sum, there has been no demonstration of a flaw against the dragonfly protocol, just some people unhappy that I don't live up to their standards or that my views of what is important in a PAKE protocol is not congruent to theirs. regards, Dan.
- Re: [TLS] Working Group Last Call for draft-ietf-… Douglas Stebila
- [TLS] Working Group Last Call for draft-ietf-tls-… Joseph Salowey (jsalowey)
- Re: [TLS] Working Group Last Call for draft-ietf-… Blumenthal, Uri - 0558 - MITLL
- Re: [TLS] Working Group Last Call for draft-ietf-… SeongHan Shin
- Re: [TLS] Working Group Last Call for draft-ietf-… Love Hörnquist Åstrand
- Re: [TLS] Working Group Last Call for draft-ietf-… Love Hörnquist Åstrand
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Love Hörnquist Åstrand
- Re: [TLS] Working Group Last Call for draft-ietf-… SeongHan Shin
- Re: [TLS] Working Group Last Call for draft-ietf-… Ralf Skyper Kaiser
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Ralf Skyper Kaiser
- Re: [TLS] Working Group Last Call for draft-ietf-… oscar.koeroo
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Peter Sylvester
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Rene Struik
- Re: [TLS] Working Group Last Call for draft-ietf-… Watson Ladd
- Re: [TLS] Working Group Last Call for draft-ietf-… Robert Ransom
- Re: [TLS] Working Group Last Call for draft-ietf-… Robert Ransom
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… CodesInChaos
- Re: [TLS] Working Group Last Call for draft-ietf-… Rene Struik
- Re: [TLS] Working Group Last Call for draft-ietf-… Watson Ladd
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Watson Ladd
- Re: [TLS] Working Group Last Call for draft-ietf-… Mohamad Badra
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Mohamad Badra
- Re: [TLS] Working Group Last Call for draft-ietf-… Eric Rescorla
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Watson Ladd
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Bodo Moeller
- Re: [TLS] Working Group Last Call for draft-ietf-… Robert Ransom
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Mohamad Badra
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… SeongHan Shin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… SeongHan Shin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… SeongHan Shin
- Re: [TLS] Working Group Last Call for draft-ietf-… Watson Ladd
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… CodesInChaos
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Joseph Birr-Pixton
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Ralf Skyper Kaiser
- Re: [TLS] Working Group Last Call for draft-ietf-… Manuel Pégourié-Gonnard
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Trevor Perrin
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins
- Re: [TLS] Working Group Last Call for draft-ietf-… Ralf Skyper Kaiser
- Re: [TLS] Working Group Last Call for draft-ietf-… Dan Harkins