IETF Logo Mail Archive

Re: [Ecrit] Nonce value -- RE: PSAP Callback - A New Beginning

Henning Schulzrinne <hgs@cs.columbia.edu> Wed, 22 February 2012 14:04 UTC

Return-Path: <hgs@cs.columbia.edu>
X-Original-To: ecrit@ietfa.amsl.com
Delivered-To: ecrit@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BDD6821F8690 for <ecrit@ietfa.amsl.com>; Wed, 22 Feb 2012 06:04:48 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.599
X-Spam-Level:
X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nJ0GVgUZf+SH for <ecrit@ietfa.amsl.com>; Wed, 22 Feb 2012 06:04:44 -0800 (PST)
Received: from paneer.cc.columbia.edu (paneer.cc.columbia.edu [128.59.29.4]) by ietfa.amsl.com (Postfix) with ESMTP id A72CF21F865C for <ecrit@ietf.org>; Wed, 22 Feb 2012 06:04:44 -0800 (PST)
Received: from [10.0.0.4] (c-98-218-140-58.hsd1.va.comcast.net [98.218.140.58]) (user=hgs10 mech=PLAIN bits=0) by paneer.cc.columbia.edu (8.14.4/8.14.3) with ESMTP id q1ME4eYJ000157 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Wed, 22 Feb 2012 09:04:41 -0500 (EST)
Mime-Version: 1.0 (Apple Message framework v1257)
Content-Type: text/plain; charset="us-ascii"
From: Henning Schulzrinne <hgs@cs.columbia.edu>
In-Reply-To: <7F2072F1E0DE894DA4B517B93C6A05852C3D915859@ESESSCMS0356.eemea.ericsson.se>
Date: Wed, 22 Feb 2012 09:04:39 -0500
Content-Transfer-Encoding: quoted-printable
Message-Id: <3D0A12D0-B1C3-4EEC-B42D-9989E2C273F5@cs.columbia.edu>
References: <CAFD6962.2CB02%mlinsner@cisco.com> <4EDA48A1.7040906@alum.mit.edu> <02BBB8BF-CDD8-4F86-A17C-B4283BE15789@cs.columbia.edu> <4EDA584E.2050604@alum.mit.edu> <255057E7-1251-4F8D-A918-B64C844065EB@cs.columbia.edu> <4EDA74C3.9070603@alum.mit.edu> <2C6CF869-417F-4891-8FB4-102D3D84694E@brianrosen.net> <4EDCF4A4.60901@alum.mit.edu> <FD0A8BFB-5B16-4D50-86C1-99DD8BEA45D4@cs.columbia.edu> <4EDD2EF6.8060707@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05852C3D914C45@ESESSCMS0356.eemea.ericsson.se> <999913AB42CC9341B05A99BBF358718D0120ABA7@FIESEXC035.nsn-intra.net> <7F2072F1E0DE894DA4B517B93C6A05852C3D9152FF@ESESSCMS0356.eemea.ericsson.se> <999913AB42CC9341B05A99BBF358718D0120AD5B@FIESEXC035.nsn-intra.net> <7F2072F1E0DE894DA4B517B93C6A05852C3D9153FE@ESESSCMS0356.eemea.ericsson.se> <999913AB42CC9341B05A99BBF358718D0120ADB8@FIESEXC035.nsn-intra.net> <7F2072F1E0DE894DA4B517B93C6A05852C3D915478@ESESSCMS0356.eemea.ericsson.se> <BD57E6B4-D1D4-474C-BC16-E53E641C5B3C@cs.columbia.edu> <! 201202212047.q1LKlsnD005202@mtv-core-4.cisco.com> <7F2072F1E0DE894DA4B517B93C6A05852C3D915859@ESESSCMS0356.eemea.ericsson.se>
To: Christer Holmberg <christer.holmberg@ericsson.com>
X-Mailer: Apple Mail (2.1257)
X-No-Spam-Score: Local
X-Scanned-By: MIMEDefang 2.68 on 128.59.29.4
Cc: "ecrit@ietf.org" <ecrit@ietf.org>
Subject: Re: [Ecrit] Nonce value -- RE: PSAP Callback - A New Beginning
X-BeenThere: ecrit@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: <ecrit.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ecrit>, <mailto:ecrit-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ecrit>
List-Post: <mailto:ecrit@ietf.org>
List-Help: <mailto:ecrit-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ecrit>, <mailto:ecrit-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 22 Feb 2012 14:04:48 -0000

Given that there are 6000+ PSAPs in the US, this is likely to be challenging. (We have proposed a mechanism, http://datatracker.ietf.org/doc/draft-ono-dispatch-attribute-validation/, that would make something like that relatively easy, since there's a US PSAP registry maintained by the FCC, but this does require some changes in UA.)

On Feb 22, 2012, at 3:40 AM, Christer Holmberg wrote:

> 
> Hi,
> 
> In many networks the PSAP identity could be asserted, to ensure that the call doesn't come from "anyone".
> 
> Regards,
> 
> Christer

v2.23.0 | Report a Bug | By Email