Re: [saag] AD review of draft-iab-crypto-alg-agility-06
Watson Ladd <watsonbladd@gmail.com> Mon, 20 July 2015 03:41 UTC
Return-Path: <watsonbladd@gmail.com>
X-Original-To: saag@ietfa.amsl.com
Delivered-To: saag@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 85C461B2F39 for <saag@ietfa.amsl.com>; Sun, 19 Jul 2015 20:41:17 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_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 lJST2niZnPRv for <saag@ietfa.amsl.com>; Sun, 19 Jul 2015 20:41:15 -0700 (PDT)
Received: from mail-wg0-x241.google.com (mail-wg0-x241.google.com [IPv6:2a00:1450:400c:c00::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3F4821B2F33 for <saag@ietf.org>; Sun, 19 Jul 2015 20:41:15 -0700 (PDT)
Received: by wgal16 with SMTP id l16so4480062wga.3 for <saag@ietf.org>; Sun, 19 Jul 2015 20:41:14 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=fHkKGUTQr6sv40xNaj6Nj2r5J3pjuzy+CB75v17DqtM=; b=aCALvXBIdoqYmA2mxmV7upA7KP8r1wJf10U4mni7H6dvoAqKYugTCswekrHbqLZLKs tX1Auyndn/QA4h5qBPuAvwDjMu/xkqQUq+RT4cB7HIi7j3vmqcNzhKx4Q8w9v8kmLhRq GK0ub/mNAcH8dt/VeDfTcsA5jHdkyeMe9pWhtfib7F2Les1CAADJLb2Fs019JmmOe/O4 TKQRQw2WDi0lUG9fdBBYndfQIofl4zXtmuvFCoaXQKNq/8fFeud5s+D3FuVR3Oh5SItR L7amnI9OeSnNauVYa6lulztcEO8XbQsKU+N+2oRW/87/saf/FxKR6wOcFnM8zCWoQpIj 0K3w==
MIME-Version: 1.0
X-Received: by 10.180.188.48 with SMTP id fx16mr17417604wic.35.1437363673941; Sun, 19 Jul 2015 20:41:13 -0700 (PDT)
Received: by 10.194.20.97 with HTTP; Sun, 19 Jul 2015 20:41:13 -0700 (PDT)
In-Reply-To: <sjmvbdf4tpr.fsf@securerf.ihtfp.org>
References: <55A938F1.9090404@cs.tcd.ie> <CD936D80-BEA2-4918-828C-E3A392761EC5@gmail.com> <sjmvbdf4tpr.fsf@securerf.ihtfp.org>
Date: Sun, 19 Jul 2015 20:41:13 -0700
Message-ID: <CACsn0ckv4YjDCBvTtnvxjjuz0y7EE+Z-6jCdq5YYrY5kxVTN6A@mail.gmail.com>
From: Watson Ladd <watsonbladd@gmail.com>
To: Derek Atkins <derek@ihtfp.com>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <http://mailarchive.ietf.org/arch/msg/saag/mKO2O12wP9RdKJ4vZJXAzX0QlO0>
Cc: "saag@ietf.org" <saag@ietf.org>
Subject: Re: [saag] AD review of draft-iab-crypto-alg-agility-06
X-BeenThere: saag@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Security Area Advisory Group <saag.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/saag>, <mailto:saag-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/saag/>
List-Post: <mailto:saag@ietf.org>
List-Help: <mailto:saag-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/saag>, <mailto:saag-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 20 Jul 2015 03:41:17 -0000
On Sun, Jul 19, 2015 at 4:24 PM, Derek Atkins <derek@ihtfp.com> wrote: > Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com> writes: > >>> 2.9: I'm not really a fan of blessing weaker algs for OS, but I lost >>> that argument before. I wonder if we would get consensus if this >>> said that weak algs are better than no encryption but still MUST be >>> deprecated as soon as feasible? >> >> I don't think we've really debated this enough to get consensus. I >> don't think weaker algs fit into our agreed definitions for OS. I >> just recall your debate with Pete on another draft, but think a wider >> debate is needed to see what the consensus is. I don't think weaker >> algorithms should fit into the definition. > > What seems like a good algorithm today may become a weaker algorithm > tomorrow. Similarly, a new, better algorithm may appear next week. So > while I think we can all agree that no, we shouldn't use 1DES today, we > don't know if next week someone will find an attack against AES-128 or > ECC-P256. What I'm saying that that qualifying "strong" and "weak" is, > unfortunately, a more subjective (vs objective) process. If this was possible, it would happen. But it really hasn't: if a symmetric cipher is not analyzed within a year or two of coming out, it never will be. The real problem is that people don't bother to properly look up these analyses and see that RC4 is weak, or that DES has insufficient size, or that Dobbertin has found free start collisions in MD5. And when questions arise about the safety of these primitives, we don't have a push to disable them, leaving it to administrator action starting at the last minute. Every single attack found recently against TLS depends on long-standing concerns that got pushed to the side in the WG process. Of course, the people deciding that algorithm XYZ sounds "better" than VWQ don't actually know the relevant field, and the more we push that decision towards end users and away from people who do know, the worse this situation gets. Sincerely, Watson Ladd > >> Best regards, >> Kathleen > > -derek > -- > Derek Atkins 617-623-3745 > derek@ihtfp.com www.ihtfp.com > Computer and Internet Security Consultant > > _______________________________________________ > saag mailing list > saag@ietf.org > https://www.ietf.org/mailman/listinfo/saag -- "Man is born free, but everywhere he is in chains". --Rousseau.
- [saag] AD review of draft-iab-crypto-alg-agility-… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paul Hoffman
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… ianG
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… ianG
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Christian Huitema
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… David Misell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Yoav Nir
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paterson, Kenny
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paterson, Kenny
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Joel Sing
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Christian Huitema
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley