From nobody Thu Mar 30 20:53:22 2023 Return-Path: X-Original-To: iotops@ietfa.amsl.com Delivered-To: iotops@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 02CD2C14CE44; Thu, 30 Mar 2023 20:53:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.096 X-Spam-Level: X-Spam-Status: No, score=-2.096 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=ri.se Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cNyICjQLEtgW; Thu, 30 Mar 2023 20:53:15 -0700 (PDT) Received: from MM0P280CU005-vft-obe.outbound.protection.outlook.com (mail-swedensouthazlp170110001.outbound.protection.outlook.com [IPv6:2a01:111:f403:c203::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 523BDC14CE40; Thu, 30 Mar 2023 20:53:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=MTFkX80uHkmLq+TeDojdDsBuTDckEvkdPLLKWY10jVMOuDPb7YaKIpoAyNApUruXvWEH91ZULcqhpD5YpoRmEdzUVi9VBU/S0XkCe8CVaXYe7OaEVO8fmh0ENfd5unlD5GzqcHp/B5hppNyx0gYsDvotJ2Pr28yvyO9N4JFFaX3VbJVJm+efVN5SvkK20FmBCOqCk4CKTNPTmE/eE4GaoMcEJCrbMvq8EiD6nDwPWSNsFv0mx4qlBuCDKS3zZI23gyz64dQXkqmGV+RLp1FcWPQdl238ap6uzD0LOzuzYh6gAP3rB4c8EPeHJwEmzv1qPvsdv/B1nG9xR0CD45/Kfw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=fjV+Jz8zR+99iys+zq99ukiSJ2VDhExPQRdnMhyzhtE=; b=COk+FnUywsZzSYyY8OkFhFSbv1rnqU7CXZgcJWBDjUjpngn/6vhlX1oHl97uzvH7odTwXPiZzGSe98IxEi2q/4Oiton3Q35KoZcJo5xq8EthuPg1sXgBGhQ/oR0WHQtX9zgqpvlz1aj8v3k0uW6KMECuzIS+ELj35slDzmZD/28BwKFy3xOQ98eGVeYlZmPBBxWeu1B4yX06HDO7XZ5mjveC6O28VbM7nelauTXFIUdguUW0E3tKYXKCsMDQWaVl4E1uGpFNVsWf5d9Kap3gUSXp1KuM2B+iDeEqGLVf2yvHhyvHpkYwLVSeVz/+xXwo6EbRphB7Tm5n/7zbsnCw3g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=ri.se; dmarc=pass action=none header.from=ri.se; dkim=pass header.d=ri.se; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ri.se; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=fjV+Jz8zR+99iys+zq99ukiSJ2VDhExPQRdnMhyzhtE=; b=QYq8Fr87w9gc+dx6kCr6wQyJx7WnIqqb6ECdYSJSqnac7EZb7IXvmF/DdqMzUBwi93boXKPUXoNSRksu6eLSMhZuZNPR4OpEzTR8aL4K0A99PzsCQ4kvzJYWO3leKCgo0Ty0dhUzT9n0DSaeS7CwEKI/zSKkWPrli3s5FUp3+zQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=ri.se; Received: from GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM (2603:10a6:150:37::17) by MM0P280MB0118.SWEP280.PROD.OUTLOOK.COM (2603:10a6:190:d::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6254.23; Fri, 31 Mar 2023 03:53:06 +0000 Received: from GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM ([fe80::5435:d7bc:5f10:99df]) by GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM ([fe80::5435:d7bc:5f10:99df%8]) with mapi id 15.20.6254.023; Fri, 31 Mar 2023 03:53:06 +0000 Message-ID: Date: Fri, 31 Mar 2023 12:52:49 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Content-Language: en-US To: draft-ietf-iotops-security-protocol-comparison@ietf.org Cc: iotops@ietf.org From: Marco Tiloca Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------YJ1JdRC6GC80IQzXps4OR02x" X-ClientProxiedBy: TYCP286CA0004.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:26c::13) To GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM (2603:10a6:150:37::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: GVYP280MB0464:EE_|MM0P280MB0118:EE_ X-MS-Office365-Filtering-Correlation-Id: 472d0b51-5804-4000-4188-08db319b6fb1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM; PTR:; CAT:NONE; SFS:(13230028)(4636009)(346002)(376002)(396003)(366004)(136003)(39860400002)(451199021)(450100002)(186003)(21480400003)(6666004)(33964004)(6512007)(6506007)(83380400001)(26005)(41300700001)(2616005)(478600001)(66556008)(66476007)(66946007)(316002)(4326008)(6486002)(6916009)(8676002)(966005)(38100700002)(2906002)(166002)(36756003)(86362001)(31696002)(235185007)(5660300002)(8936002)(15650500001)(44832011)(31686004)(45980500001)(43740500002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?dGNHVzVEeiswY3VtT3dBZ2lCV2VKcVo3SkRvQ3U1aFVUU0d0cXVZS0NrNFQx?= =?utf-8?B?QlRtWUtYOGR1bmlmMDRiQUE4aHhuakN2MGxGV0dkVndyZEZWckhNb0NBVklY?= =?utf-8?B?Rks1clRFOElPbmxPWjNWZVQ5YUhNYTZGWWR6bDd2cVNLMHd0TVl5RnNJdjl3?= =?utf-8?B?MGZHYnk3V1BZL1pCOXNWZ3AxNUhXc1dpY1hIQ2R5WDdlZXBXdkdZN2E5WXBQ?= =?utf-8?B?Wnl1RFNETjZ2UGFnOFZ6T3FFeEdUdWprK2Q3TEYrV1RrdTB2cVpQc1BBcXJt?= =?utf-8?B?VytxcmlTK2pSRyt3UXJyeHJoLzAvSEphdTV0ZExDaDVKM091ckw4MVNKL2FJ?= =?utf-8?B?UkMwbG1QSVFQK1JSNGNTQ0hJcmxjSFRQNGdnWGVQUldSR21mNzNBOFR1cElC?= =?utf-8?B?VStOOEVQZ3BtTFZMc1NhQmhHclBuYWJMdzZxak9RekRpSkQ3eHRxYkRaeW5j?= =?utf-8?B?bEFJVmdRN3ZVY1ZiTk02YTZmc0NXaVJoNWE2QThRRzNETEowNmNac1RCb0xj?= =?utf-8?B?OGZyT0kzMHdPZWxLOHdUUDRRa1piTWlwaUI1UHZuTjc3MXBocHlrNlBBd1Qx?= =?utf-8?B?YzZ1OE9iNUUwOTdLKzlhMjVENEtTQ3VTaEN0b2VsS1huRjdYMHd2MkhPWGZS?= =?utf-8?B?cmFUbnZQR3k3S3NiRG5WRG1McmFXY1BLMFM2RUQ5YjQxSjA3amFXUGN0cVdy?= =?utf-8?B?T1lpdElrRVVYL1NqVzJwTHBoYWQzbkpNdDQ3N0JvTDZXNXZOVVFMcVBHWVd6?= =?utf-8?B?blY1VGE2Z3dSYXQyMkFvRTZNcjBGT29RWXNwYlFONVVha3pKZVdoT01JNDFx?= =?utf-8?B?cEI3dyt6YTcvajJHa2FjR1JWNHRoTHJRMFgxME9ibEFJU3lkcVFjZWUzemd3?= =?utf-8?B?YWN0TU1QTkNpam5UenpEdElZcEpHLzlyaUlZMnpNRkI5bTJ0aWlBQUZNdUxx?= =?utf-8?B?MHdiNG8xTDJiZEtGalprTjBCbHMxR1FxSnlDQ3Jxd3ZqY3R2S2g0ajJzc0k0?= =?utf-8?B?amtMQmxqdm5abGxjdmN2ZlpJRnJlZGhLNmQ3akJsSHNDMVRRMDk4U1h1R2tj?= =?utf-8?B?N0YycHl6eTNJVkhSMStYb0hLSGFkakJtTFpZZGQ5RTI5MERBS3dhcW9yemMx?= =?utf-8?B?UnN2QlJLcHA4Ym4xQVJtZXNMVEdsNEJSZ0J3MUhqVm45bGdFWEtmR3dVN2h5?= =?utf-8?B?M05EaytvRm5oc2FXcTVTUXVDSFJwMFk4OHJGTzJ4SVZMd3NUZVdHOFlGZkpr?= =?utf-8?B?MW9JV1RXWTRCYU1OUThCaWJEKzlhOU5FVGVEcmYrVDhjaU5YTEkrSlg4VWZr?= =?utf-8?B?dEs2REE3VDVnTWRoRnh1bldGTFdwU25UeHVKZm5oY3lpSGIvWm94QVpydlE1?= =?utf-8?B?UkJSRGhVTFFzUElSOGdOWlZRWVFIaWZYNU9EeE1QcFkvOHBraDRWbU5MaUp0?= =?utf-8?B?Q21TSVRGaDVBZHpjZk9KS1NwOVZOVHVrQlJFeWRXa09FNWZLUXlBY3IyWENj?= =?utf-8?B?ckdTTWxiTlYyblJ6bC8yalU5QkZHZHNZZjFUUnFycVlxeXgvWXNPRVp3MERD?= =?utf-8?B?bURneDAzbzN2Wk5HK0lMUmdJcFV5K3FzT1V2TmFjd3hVZHFHSTFtUmU3dnhq?= =?utf-8?B?eGd2RGpaODh1RjNpeE1LTTFpZTV5Q2NrQ2UyZVBiYWMrNGVsbUIvTjVFakM3?= =?utf-8?B?eWQ5T1RRYU5ERG10cy9WTXZIWk9lQ0ptZ2dTbjRSZXdreXBPVU83RlNoSzd0?= =?utf-8?B?N2NETy9zN3JxOVJqOENKejBnSCthLytvZ1gxRUUrS2hIVXFwZ0gyQ2RyNHNV?= =?utf-8?B?OG1YdzczSkIzRldkcXAxeU5WcjJmcDdyVWRTejJTNU1hQURrWXdEOUNVSjdj?= =?utf-8?B?anJtUWJ6cGUzMWFSR0tObFg4Tnp6MXZiRnVJSDhKb2ZaWVdtc3M1eVEyR0ZU?= =?utf-8?B?Yk5UUDZKZzRvKzFaekIxT2haRXpZYjhBS2Z1SHhlYnhUazBGejM0aUFGZmQ5?= =?utf-8?B?SzZRV1ZBM1JUY2RUV2Eya2J5UDdvaXN3enNmV3k3NXp1VE1OaXMweFNyTjdx?= =?utf-8?B?aDZ6SHFFcXR3Z2dqL3gxWkZVdjBXMzc2V1FXMnVlQUprclY3QmV4eVdyOFhv?= =?utf-8?Q?2fM+HNhRGBl9RYOR3tQsHt56t?= X-OriginatorOrg: ri.se X-MS-Exchange-CrossTenant-Network-Message-Id: 472d0b51-5804-4000-4188-08db319b6fb1 X-MS-Exchange-CrossTenant-AuthSource: GVYP280MB0464.SWEP280.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Mar 2023 03:53:06.7816 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 5a9809cf-0bcb-413a-838a-09ecc40cc9e8 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vn5xAxz2zbr07NPMaZXaybvYIp1ls1mRn3guqWdH8uuglWtWLhsZEojMHqlXhRdFnP1dTWfgepn+jdBtlOCIow== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MM0P280MB0118 Archived-At: Subject: [Iotops] Group OSCORE message sizes in -iotops-security-protocol-comparison X-BeenThere: iotops@ietf.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: IOT Operations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 31 Mar 2023 03:53:20 -0000 --------------YJ1JdRC6GC80IQzXps4OR02x Content-Type: multipart/mixed; boundary="------------izu2I06EXBMAx34H2ZPUlsTM"; protected-headers="v1" From: Marco Tiloca To: draft-ietf-iotops-security-protocol-comparison@ietf.org Cc: iotops@ietf.org Message-ID: Subject: Group OSCORE message sizes in -iotops-security-protocol-comparison --------------izu2I06EXBMAx34H2ZPUlsTM Content-Type: multipart/mixed; boundary="------------IFTtI62Se0kiJ06w0Zw4toXd" --------------IFTtI62Se0kiJ06w0Zw4toXd Content-Type: multipart/alternative; boundary="------------2abalMo9DatmdVEOiy0HyCAe" --------------2abalMo9DatmdVEOiy0HyCAe Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 SGVsbG8gYXV0aG9ycyBvZiAtc2VjdXJpdHktcHJvdG9jb2wtY29tcGFyaXNvbiwgaGVsbG8g SU9UT1BTLA0KDQpKdXN0IHJlbGF5aW5nIHRvIHRoZSBsaXN0IG15IGNvbW1lbnQgZnJvbSB0 aGUgc2Vzc2lvbiBhdCBJRVRGIDExNi4NCg0KV2l0aCByZWZlcmVuY2UgdG8gc2xpZGUgNiBv ZiBbMV0gc2hvd2luZyBUYWJsZSA2IGZyb20gWzJdLCBJIHRoaW5rIHRoYXQgDQp0aGUgb3Zl cmhlYWQgc2hvd24gaW4gdGhlIGxhc3Qgcm93IGZvciAiR3JvdXAgT1NDT1JFIHBhaXJ3aXNl IHJlc3BvbnNlIiANCnNob3VsZCBiZSBsb3dlciB0aGFuIHdoYXQgaXMgaW4gdGhlIGN1cnJl bnQgdHJpcGxlICgxMSwgMTMsIDE0KS4NCg0KQXMgcGVyIFszXTogIlRoZSB2YWx1ZSBvZiB0 aGUgJ2tpZCcgcGFyYW1ldGVyIGluIHRoZSAndW5wcm90ZWN0ZWQnIGZpZWxkIA0Kb2YgcmVz cG9uc2UgbWVzc2FnZXMgTVVTVCBiZSBzZXQgdG8gdGhlIFNlbmRlciBJRCBvZiB0aGUgZW5k cG9pbnQgDQp0cmFuc21pdHRpbmcgdGhlIG1lc3NhZ2UsIGlmIHRoZSByZXF1ZXN0IHdhcyBw cm90ZWN0ZWQgaW4gZ3JvdXAgbW9kZS4gDQpUaGF0IGlzLCB1bmxpa2UgaW4gW1JGQzg2MTNd LCB0aGUgJ2tpZCcgcGFyYW1ldGVyIGlzIGFsd2F5cyBwcmVzZW50IGluIA0KcmVzcG9uc2Vz IHRvIGEgcmVxdWVzdCB0aGF0IHdhcyBwcm90ZWN0ZWQgaW4gZ3JvdXAgbW9kZS4iDQoNClNp bmNlIHlvdSBhcmUgY29uc2lkZXJpbmcgYSByZXF1ZXN0IHByb3RlY3RlZCBpbiBwYWlyd2lz ZSBtb2RlLCB0aGUgDQpyZXNwb25zZSAoaXJyZXNwZWN0aXZlIG9mIHRoZSBtb2RlIHVzZSB0 byBwcm90ZWN0IGl0KSBpcyBub3QgcmVxdWlyZWQgdG8gDQppbmNsdWRlIHRoZSBzZXJ2ZXIn cyBTZW5kZXIgSUQuIFRoZW4geW91IHdvdWxkIGhhdmUgYSBvdmVyaGVhZCB0cmlwbGUgDQoo MTEsIDExLCAxMSksIGkuZS4gdGhlIFNlbmRlciBJRCBzaXplIGRvZXMgbm90IHBsYXkgYSBy b2xlIGluIHRoZSANCnJlc3BvbnNlIG92ZXJoZWFkLg0KDQpUaGVzZSBhcmUgZGV0YWlscyB0 aGF0IGFyZSBhZG1pdHRlZGx5IHdvcnRoIGNsYXJpZnlpbmcgaW4gdGhlIHRleHQgYmVsb3cg DQp0aGUgY29tcGFyaXNvbiB0YWJsZXMuDQoNCkJlc3QsDQovTWFyY28NCg0KUC5TLiBFdmVu IGlmIHRoZSBTZW5kZXIgSUQgd2FzIGluY2x1ZGVkIGluIHRoZSByZXNwb25zZSwgSSB3b3Vs ZCBoYXZlIA0KZXhwZWN0ZWQgdGhlIHRyaXBsZSB0byBiZSAoMTEsIDEyLCAxMykgcmF0aGVy IHRoYW4gKDExLCAxMywgMTQpLCBhcyANCmNvbnNpZGVyaW5nIGEgU2VuZGVyIElEIG9mIDAs IDEgYW5kIDIgYnl0ZXMsIHJlc3BlY3RpdmVseS4NCg0KWzFdIA0KaHR0cHM6Ly9kYXRhdHJh Y2tlci5pZXRmLm9yZy9tZWV0aW5nLzExNi9tYXRlcmlhbHMvc2xpZGVzLTExNi1pb3RvcHMt Y29tcGFyaXNvbi1vZi1jb2FwLXNlY3VyaXR5LXByb3RvY29scy0wMC5wZGYNCg0KWzJdIA0K aHR0cHM6Ly9kYXRhdHJhY2tlci5pZXRmLm9yZy9kb2MvaHRtbC9kcmFmdC1pZXRmLWlvdG9w cy1zZWN1cml0eS1wcm90b2NvbC1jb21wYXJpc29uLTAwI2ZpZ3VyZS02DQoNClszXSANCmh0 dHBzOi8vZGF0YXRyYWNrZXIuaWV0Zi5vcmcvZG9jL2h0bWwvZHJhZnQtaWV0Zi1jb3JlLW9z Y29yZS1ncm91cGNvbW0tMTcjc2VjdGlvbi00LjINCg0KLS0gDQpNYXJjbyBUaWxvY2ENClBo LkQuLCBTZW5pb3IgUmVzZWFyY2hlcg0KDQpQaG9uZTogKzQ2ICgwKTcwIDYwIDQ2IDUwMQ0K DQpSSVNFIFJlc2VhcmNoIEluc3RpdHV0ZXMgb2YgU3dlZGVuIEFCDQpCb3ggMTI2Mw0KMTY0 IDI5IEtpc3RhIChTd2VkZW4pDQoNCkRpdmlzaW9uOiBEaWdpdGFsIFN5c3RlbXMNCkRlcGFy dG1lbnQ6IENvbXB1dGVyIFNjaWVuY2UNClVuaXQ6IEN5YmVyc2VjdXJpdHkNCg0KaHR0cHM6 Ly93d3cucmkuc2UNCg0K --------------2abalMo9DatmdVEOiy0HyCAe Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hello authors of -security-protocol-comparison, hell= o IOTOPS,

Just relaying to the list my comment from the session at IETF 116.<= br>
With reference to slide 6 of [1] showing Table 6 from [2], I think that the overhead shown in the last row for "Group OSCORE pairwise response" should be lower than what is in the current triple (11, 13, 14).

As per [3]: "The value of the 'kid' parameter in the 'unprotected' field of response messages MUST be set to the Sender ID of the endpoint transmitting the message, if the request was protected in group mode. That is, unlike in [RFC8613], the 'kid' parameter is always present in responses to a request that was protected in group mode."

Since you are considering a request protected in pairwise mode, the response (irrespective of the mode use to protect it) is not required to include the server's Sender ID. Then you would have a overhead triple (11, 11, 11), i.e. the Sender ID size does not play a role in the response overhead.

These are details that are admittedly worth clarifying in the text below the comparison tables.

Best,
/Marco

P.S. Even if the Sender ID was included in the response, I would have expected the triple to be (11, 12, 13) rather than (11, 13, 14), as considering a Sender ID of 0, 1 and 2 bytes, respectively.<= br>
[1] https://datatracker.ietf.org/meeting/116/materials/slides-116= -iotops-comparison-of-coap-security-protocols-00.pdf

[2] https= ://datatracker.ietf.org/doc/html/draft-ietf-iotops-security-protocol-comp= arison-00#figure-6

[3] https://datatrac= ker.ietf.org/doc/html/draft-ietf-core-oscore-groupcomm-17#section-4.2= 
--=20
Marco Tiloca
Ph.D., Senior Researcher

Phone: +46 (0)70 60 46 501

RISE Research Institutes of Sweden AB
Box 1263
164 29 Kista (Sweden)

Division: Digital Systems
Department: Computer Science
Unit: Cybersecurity

https://www=
=2Eri.se
--------------2abalMo9DatmdVEOiy0HyCAe-- --------------IFTtI62Se0kiJ06w0Zw4toXd Content-Type: application/pgp-keys; name="OpenPGP_0xEE2664B40E58DA43.asc" Content-Disposition: attachment; filename="OpenPGP_0xEE2664B40E58DA43.asc" Content-Description: OpenPGP public key Content-Transfer-Encoding: quoted-printable -----BEGIN PGP PUBLIC KEY BLOCK----- xsBNBFSNeRUBCAC44iazWzj/PE3TiAlBsaWna0JbdIAJFHB8PLrqthI0ZG7GnCLN R8ZhDz6ZaRDPC4FR3UcMhPgZpJIqa6Zi8yWYCqF7A7QhT7E1WdQR1G0+6xUEd0ZD +QBdf29pQadrVZAt0G4CkUnq5H+Sm05aw2Cpv3JfsATVaemWmujnMTvZ3dFudCGN dsY6kPSVzMRyedX7ArLXyF+0Kh1T4WUW6NHfEWltnzkcqRhn2NcZtADsxWrMBgZX kLE/dP67SnyFjWYpz7aNpxxA+mb5WBT+NrSetJlljT0QOXrXMGh98GLfNnLAl6gJ ryE6MZazN5oxkJgkAep8SevFXzglj7CAsh4PABEBAAHNJ01hcmNvIFRpbG9jYSA8 bWFyY28udGlsb2NhODRAZ21haWwuY29tPsLAeAQTAQIAIgUCVI15FQIbAwYLCQgH AwIGFQgCCQoLBBYCAwECHgECF4AACgkQ7iZktA5Y2kNZdgf/drEFkXWpz9pPm0/Z wNNfXzHkpGLqcfPlvQaSNFFboHwJaeKZ6s3dCGpzDlV6bLrRM9LN/sgNRT0eNiEl JHtKDW/fqvzrHl3LCsDKed4LK4Gg2mE0nvWvTno9Nyza8TatJm1+V2S7MbDgSE/F 26QK2VL9Y/ur5BHgUI34mUar4iE1Aq7nsFbN6NEvamyQPWlkN+rCjtnT0+NLGb5V nDVKAHSgiYgGQeDvlisWb9NtsxzXf1qge3tlCufadSWXyqa4oOq4hEcD3GBUQVuG fBNa7r0mqHzVZf0qd+Kxzs6Dp9LxTGp7aSjiXN6cBoapz7lSP0wXOgSzIJ1X2UtV ssKv28LAewQTAQIAJQIbAwYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AFAlSNerkC GQEACgkQ7iZktA5Y2kMiuwgAt/bVZKqD92JNWDTX6h1MUsgejwj4RXs6UYqFdWW/ 4nw4mFHzYS+gBjOQAWCBhzVZLOk6gKcRZ/s86ncVygiDUh9fbSDTcuzOp2qgu9ns c8sEsYp1hwmiIEbI6FHPtyeQQNilsfU8+VHX2C9yQtMK/OXlf5qNkJMj9k55u+e1 ELQ2sjUXkMB4MxMhmi/3P3hMz9PDcB66BtQcDFYkx5PIaz/izCST0o28AJq0dion JpPsQ+hFOIAkJi6aCAt3xQf0KnXlAczWxCD3J3XTFK4MES/b3n3oc2GJY8I+tsfT 5jpNsWhfWGBkMaQSKZ939D4oFAhAq3gnNRgZszJeTvsMvc0cTWFyY28gVGlsb2Nh IDxtYXJjb0BzaWNzLnNlPsLAeAQTAQIAIgUCVI16cwIbAwYLCQgHAwIGFQgCCQoL BBYCAwECHgECF4AACgkQ7iZktA5Y2kNxXggAhFyfi+VlqgIj5a54npaUoREoQ5Tj 8gzUPmqOXddo0q9f1cQn/+ehKpbb3TDVzO35HBXZvuFGn5DHBUYhqBFWTx+H5zHg GBRhF0imQ9Yi/gHe2StgrSIa5528iV2g47OyDDlSCoCWEM4WwWkJqv9CP2J53Gb6 3UOPuq5j+BF9wtDs6M6YAs9GdHIDhvUJWGDhOZevyp/DWE5d3LCI+HJIajDjhJK0 2kVg47aBusW40mGXmjWmtJXP+QtZRfSaabFxCVE3APBn+P4zuyb+mk1gwkN51OiF uYQr1ig3M55kaoGbrs57fVuGtaC9DSc1vgaicJQrYpCbOrbR/yZAedz3xc02TWFy Y28gVGlsb2NhIChtYXJjby50aWxvY2FAcmkuc2UpIDxtYXJjby50aWxvY2FAcmku c2U+wsB3BBMBCAAhBQJaQCeQAhsDBQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJ EO4mZLQOWNpDAS8IAIko8kg8YfSgacsljgbUjYOA2LJUq3UfiSRz95PwHP05JsDG BmjcmTLfzZ7gNtprJatBEV6fRotIW7NtTgFfg79hFJoipQ7crBQ07WJMLrk4fPRe KsaiE9Q6xzRIQy2mb7jN9gbsbynfkwrSH2CnCAYwbSPSZlfhEOO7LALzyLVXELAx YZplGVSs9eQLeeoMNFw+24QamdxaEBVC3Zmp7IhO/0oJSYOe2Zcs97q8Re058j1n cd6p4jw6QbBemi1WhuAtr+ZWYWPoQAsPOPscLa61+DEQIEl12ZwMieu8aBORm1cR VvItC6IrbSUmZieY9Y3wNdpVVpDhc/+VdSvOgTPOwE0EVI15FQEIAJaan6TouRjj 97Lt4Du6ZhVzbaLJWoARebLANjMSN7BjBFyNOsf83HUSrCMgO5b4EESgwtFk4cKC aOjodGZYi61xhUK32J6iS6W2Siv0EGhBU+Ij5OnnU6nTaJ+QZysRA1mLurd+Y62E VnBno0mdRsDZvJxopnygKW8MJCPoCMTJ0E+dLvdRoSgOyqwZWNnAKF84yDk7IWb3 RCOkjDybS4NVwLMop/GrdP/Pu3JGC5whR7zgTMG64kERISMr+EXSdHYsOHVKEPb0 VasVlI1VUJW7VRhksBrJ/ygoocekz7CF+MRg7hewOlXjNDXkD4PXkdGIdHoB1/g8 O08zUMLCCCMAEQEAAcLAXwQYAQIACQUCVI15FQIbDAAKCRDuJmS0DljaQ8YTB/9Y 2NPLfPvi8uYfJxWwVdehDxbX7znyZHIB3RrwljNjfEHsJW2ojcfLz3hBzDgfobv3 0DU4v0HUR4DxiPdo7PQ1tTJ/kZb6Ki2veHz4ogI5hnfj8FBo4vN28M2ZGgYef415 POEXt5J6I8qLaN7H41Wh2GM5UZfDwSFgaR5ku/KccRuiIszhNvI9tVH0ex1WooZV MPEpITedqajeS+1jqzJEUiJTPlbMl9gC6pu3qbdPEMRvywD2nNou6GZ+clFzXYfk 1VkRmYT8SQkVOWQ/jCdnI5J/+vb9V3SIdq4HC/ntyljocUUx7uu8rizswTnNy04S XLkLo0K7Vlo211S6oNI8 =3DOGai -----END PGP PUBLIC KEY BLOCK----- --------------IFTtI62Se0kiJ06w0Zw4toXd-- --------------izu2I06EXBMAx34H2ZPUlsTM-- --------------YJ1JdRC6GC80IQzXps4OR02x Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEOEo4cV326Z7GypVg7iZktA5Y2kMFAmQmWREFAwAAAAAACgkQ7iZktA5Y2kN3 bgf9GE+vNciZTQKP2QD98PFXfzZV/v6MUuNkfH9PXeCSidXNzHHzUoqkPnSFOr5dr+fEpgshBRrR yiSHp23JnioIZWkagzYcIffwxBv8xNHGFLzIVyITgvVXHRf5N+urQN/GPqHFw/yCEBObVBQ8C5Oi J8H0DIcz2tGIPVIAMwEgcY+1mkd5wGRLZSLBi+0JlBLaLGuD2pw8dop7jfXONNFZJpVWUuSqbQBp zLEky2JdZBxStMlHgsUgnoM2VJ1Yc0cokAvoIOFoIuRPUFUloHATDMGJOA6qNSLDpwHtWg9FLwcJ p1aWo2/trH7BcWdUcesZ0oGrJutXCSlb3JzZ9mFvoA== =abRJ -----END PGP SIGNATURE----- --------------YJ1JdRC6GC80IQzXps4OR02x--