From cabo@tzi.org Mon Aug 3 11:58:35 2009 Return-Path: X-Original-To: 6lowapp@core3.amsl.com Delivered-To: 6lowapp@core3.amsl.com Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id DDA4D3A6AF4 for <6lowapp@core3.amsl.com>; Mon, 3 Aug 2009 11:58:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.694 X-Spam-Level: X-Spam-Status: No, score=-5.694 tagged_above=-999 required=5 tests=[AWL=0.555, BAYES_00=-2.599, HELO_EQ_DE=0.35, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1LZDA5MhCYX6 for <6lowapp@core3.amsl.com>; Mon, 3 Aug 2009 11:58:35 -0700 (PDT) Received: from informatik.uni-bremen.de (mailhost.informatik.uni-bremen.de [IPv6:2001:638:708:30c9:209:3dff:fe00:7136]) by core3.amsl.com (Postfix) with ESMTP id 31CCC3A6E87 for <6lowapp@ietf.org>; Mon, 3 Aug 2009 11:58:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at informatik.uni-bremen.de Received: from smtp-fb3.informatik.uni-bremen.de (smtp-fb3.informatik.uni-bremen.de [134.102.224.120]) by informatik.uni-bremen.de (8.14.3/8.14.3) with ESMTP id n73IwSr6020225 for <6lowapp@ietf.org>; Mon, 3 Aug 2009 20:58:29 +0200 (CEST) Received: from [192.168.217.107] (p5489F1F1.dip.t-dialin.net [84.137.241.241]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by smtp-fb3.informatik.uni-bremen.de (Postfix) with ESMTP id C3A09BE8E for <6lowapp@ietf.org>; Mon, 3 Aug 2009 20:58:28 +0200 (CEST) Message-Id: <942A76F6-17CE-41AB-99A9-ABE784EDBF41@tzi.org> From: Carsten Bormann To: 6lowapp@ietf.org Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v935.3) Date: Mon, 3 Aug 2009 20:58:27 +0200 X-Mailer: Apple Mail (2.935.3) Subject: [6lowapp] 1, 2, 3, testing X-BeenThere: 6lowapp@ietf.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Application protocols for constrained nodes and networks <6lowapp.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Aug 2009 18:58:36 -0000 Is this thing on? Gruesse, Carsten From wesley.m.eddy@nasa.gov Thu Aug 20 11:59:55 2009 Return-Path: X-Original-To: 6lowapp@core3.amsl.com Delivered-To: 6lowapp@core3.amsl.com Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 386D23A6781 for <6lowapp@core3.amsl.com>; Thu, 20 Aug 2009 11:59:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.44 X-Spam-Level: X-Spam-Status: No, score=-6.44 tagged_above=-999 required=5 tests=[AWL=0.159, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w1+32Y8NDuhX for <6lowapp@core3.amsl.com>; Thu, 20 Aug 2009 11:59:54 -0700 (PDT) Received: from ndjsnpf02.ndc.nasa.gov (ndjsnpf02.ndc.nasa.gov [198.117.1.122]) by core3.amsl.com (Postfix) with ESMTP id 561F93A6E9E for <6lowapp@ietf.org>; Thu, 20 Aug 2009 11:59:41 -0700 (PDT) Received: from ndjsppt03.ndc.nasa.gov (ndjsppt03.ndc.nasa.gov [198.117.1.102]) by ndjsnpf02.ndc.nasa.gov (Postfix) with ESMTP id D3D5DA8121; Thu, 20 Aug 2009 13:59:46 -0500 (CDT) Received: from ndjshub02.ndc.nasa.gov (ndjshub02.ndc.nasa.gov [198.117.4.161]) by ndjsppt03.ndc.nasa.gov (8.14.3/8.14.3) with ESMTP id n7KIxkRx016478; Thu, 20 Aug 2009 13:59:46 -0500 Received: from NDJSSCC01.ndc.nasa.gov ([198.117.4.166]) by ndjshub02.ndc.nasa.gov ([198.117.4.161]) with mapi; Thu, 20 Aug 2009 13:59:46 -0500 From: "Eddy, Wesley M. (GRC-MS00)[Verizon]" To: "6lowapp@ietf.org" <6lowapp@ietf.org> Date: Thu, 20 Aug 2009 13:59:42 -0500 Thread-Topic: certificate compression Thread-Index: AcohyGB1+nJp4aRpR7GnW6rPJMPphg== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=1.12.7400:2.4.4, 1.2.40, 4.0.166 definitions=2009-08-20_10:2009-08-11, 2009-08-20, 2009-08-20 signatures=0 X-Mailman-Approved-At: Thu, 20 Aug 2009 13:47:36 -0700 Cc: "dsturek@grid2home.com" Subject: [6lowapp] certificate compression X-BeenThere: 6lowapp@ietf.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Application protocols for constrained nodes and networks <6lowapp.ietf.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Aug 2009 18:59:55 -0000 In the bar-BoF at IETF 75, I recall a bullet on one of Don's slides mentioning the need for a certificate compression mechanism. One existing standard for X.509 certificate compression that I know of was developed as part of the Aeronautical Telecommunications Network (ATN) SARPS, where the limited bandwidth of air-ground links drove the development of the mechanism. It's discussed briefly in: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=3D964255 which mentions and order of magnitude reduction in size on the link. Some specifics can be found online in: http://www.mccallumwhyman.com/downloads/atnsarps/e3/ed3vol8.pdf A similar technique may be applicable for the problem spaces 6LowApp considers. --------------------------- Wes Eddy Network & Systems Architect Verizon FNS / NASA GRC Office: (216) 433-6682 ---------------------------