Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd
"Dan Harkins" <dharkins@lounge.org> Wed, 04 December 2013 00:12 UTC
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Date: Tue, 03 Dec 2013 16:12:17 -0800
From: Dan Harkins <dharkins@lounge.org>
To: Trevor Perrin <trevp@trevp.net>
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Cc: "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd
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On Tue, December 3, 2013 2:59 pm, Trevor Perrin wrote: > On Tue, Dec 3, 2013 at 12:27 AM, Dan Harkins <dharkins@lounge.org> wrote: >> >> Dear Rene, >> >> On Mon, December 2, 2013 6:28 am, Rene Struik wrote: >>> Dear colleagues: >>> >>> I had a look at draft-ietf-tls-pwd-02. While I do appreciate the work >>> that went into this draft, I have to concur with some other commenters >>> (e.g., Doug Stebila, Bodo Moeller) that it is unclear what makes this >>> protocol special compared to other contenders, both in terms of >>> performance and detailed cryptanalysis. One glaring omission is >>> detailed >>> security evidence, which is currently lacking (cross-referencing some >>> other standards that have specified the protocol does not by itself >>> imply the protocol is therefore secure). I am kind of curious what >>> technical advantages the "Dragonfly" protocol has over protocols that >>> seem to have efficiency, detailed and crypto community reviewed >>> evidence, such as, e.g., AugPAKE (which is another TLS-aimed draft) and >>> others. So, if the TLS WG has considered a feature comparison, that >>> would be good to share. >> >> dragonfly is a balanced PAKE kind of exchange and it has certain >> advantages over augmented PAKE schemes like TLS-SRP > > Wait, what? Yes, well good morning to you too! > "Augmented PAKE" is of course better than "Balanced PAKE", as it > allows the server to store non-usable credentials. This point was noted in the text you snipped in your response. > TLS already has an "Augmented PAKE" - TLS/SRP (RFC 5054) which is > implemented in OpenSSL and elsewhere. This was also mentioned in the text you snipped in your response. > It's not used on the web, or widely, as the TLS layer is generally the > wrong place for user authentication (e.g. leaks username, terminated > at front-end machines without access to user credentials, etc). > > However, what little demand exists for a TLS PAKE seems like it's > being adequately served by TLS-SRP. > > Why is the WG considering another PAKE with worse properties > (non-augmented)? As has been discussed on the list, because it also has better properties. And it has useful applications. A better question is, where have you been for the past 2 years? You wait to question consideration of this draft not only after it's been adopted as a working group item but also after WGLC has closed on the draft! 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