Re: [TLS] Deprecate SHA1 for signatures in TLS 1.3 (was Re: TLS 1.3 draft-07 sneak peek)

"Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu> Wed, 08 July 2015 16:05 UTC

Return-Path: <prvs=463194be81=uri@ll.mit.edu>
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 896641A017A for <tls@ietfa.amsl.com>; Wed, 8 Jul 2015 09:05:38 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.209
X-Spam-Level:
X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01, UNPARSEABLE_RELAY=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 qAcoejPt96ve for <tls@ietfa.amsl.com>; Wed, 8 Jul 2015 09:05:37 -0700 (PDT)
Received: from mx1.ll.mit.edu (MX1.LL.MIT.EDU [129.55.12.45]) by ietfa.amsl.com (Postfix) with ESMTP id 1B3051A010F for <tls@ietf.org>; Wed, 8 Jul 2015 09:05:37 -0700 (PDT)
Received: from LLE2K10-HUB01.mitll.ad.local (LLE2K10-HUB01.mitll.ad.local) by mx1.ll.mit.edu (unknown) with ESMTP id t68G5ZFZ018588; Wed, 8 Jul 2015 12:05:35 -0400
From: "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu>
To: "Salz, Rich" <rsalz@akamai.com>
Thread-Topic: [TLS] Deprecate SHA1 for signatures in TLS 1.3 (was Re: TLS 1.3 draft-07 sneak peek)
Thread-Index: AQHQuMqHM/L4/ZIBKEisF6Kbx4+pEp3QcEqAgAAI+QCAAAQ1gIAADWmAgAA2FYCAACIggIAAML+AgADssAD//71kgIAAAFIA
Date: Wed, 08 Jul 2015 16:05:35 +0000
Message-ID: <D1C2C267.1BAA3%uri@ll.mit.edu>
References: <CABcZeBOWK_WnHAefsZUBr4UyEkyiZqi1mhoZH8ZeGFftdOqTTw@mail.gmail.com> <CABcZeBMPsopxV=mu+MJAwJC6w=iuytA3ueyXKpg1QFdV=JWirw@mail.gmail.com> <201507071242.23235.davemgarrett@gmail.com> <201507071257.26088.davemgarrett@gmail.com> <CABcZeBNxW6jaf=HZFvm56K5pKeLD4GyNXOimUHUCt34r_76Vzw@mail.gmail.com> <20150707205858.GH21534@mournblade.imrryr.org> <CABkgnnXZ9HmW2BHrda3s9LMVUzZbdbdD2yKU84w2W8roycJ-xg@mail.gmail.com> <a774e57216864bbebefa3b38bb65c183@ustx2ex-dag1mb2.msg.corp.akamai.com> <CABkgnnXpboFmkgr37aWsNdm-OfvVwyd0jW4HHYuGMXht6=CjRA@mail.gmail.com> <D1C2C216.1BAA0%uri@ll.mit.edu>
In-Reply-To: <D1C2C216.1BAA0%uri@ll.mit.edu>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/14.5.2.150604
x-originating-ip: [172.25.177.187]
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha256"; boundary="B_3519201928_4604074"
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.14.151, 1.0.33, 0.0.0000 definitions=2015-07-08_08:2015-07-08,2015-07-08,1970-01-01 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1506180000 definitions=main-1507080250
Archived-At: <http://mailarchive.ietf.org/arch/msg/tls/mQJRA5A1bkcKfhS15rbLqbWQiVg>
Cc: "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Deprecate SHA1 for signatures in TLS 1.3 (was Re: TLS 1.3 draft-07 sneak peek)
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: <https://mailarchive.ietf.org/arch/browse/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: Wed, 08 Jul 2015 16:05:38 -0000

On 7/8/15, 12:04 , "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu> wrote:

>I do too - we do mutual certificate-based authentication.

Having said that, we do not care much for SHA1.


>On 7/8/15, 12:02 , "TLS on behalf of Martin Thomson" <tls-bounces@ietf.org
>on behalf of martin.thomson@gmail.com> wrote:
>
>>On 7 July 2015 at 18:55, Salz, Rich <rsalz@akamai.com> wrote:
>>> Agreed, nobody cares much about the client side.
>>
>>I do, but only a little (we do mutual authentication for WebRTC and we
>>want to migrate from RSA to ECDSA certs).