Received: from alln-iport-6.cisco.com (alln-iport-6.cisco.com [173.37.142.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by mx.ietf.org (Postfix) with ESMTPS id 98F2646; Tue, 20 Oct 2026 16:44:09 +0000 (UTC) Authentication-Results: mx.ietf.org; dkim=pass header.d=cisco.com header.s=iport01 header.b=gvDTZpz9; spf=pass (mx.ietf.org: domain of eckelcu@cisco.com designates 173.37.142.93 as permitted sender) smtp.mailfrom=eckelcu@cisco.com; dmarc=pass (policy=reject) header.from=cisco.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cisco.com; i=@cisco.com; l=9340; q=dns/txt; s=iport01; t=1792514649; x=1793724249; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=BXTnRoHHj0i4+oK0RVECldURYJaupXUAdr6MD7j/FiQ=; b=gvDTZpz9XMm7Em8GhBqh01GeaCEmk/dIMaf1qXvwPiWzLCz4mbkUJEQp Tmyk03ocJiYZs2IENbSOO57WT2P/CMn7nC74WJSXXSptClmkSeEdxD3MN gXEIIWfKEODE3ii3GUekKQArFKkmIojkQ5wNRkG9LVFtrXq7aTMlxc93h Gy5I9Tj95bT6jQSyw6L7TyfGHDJtleY5yj6GoHJWKWusNrZD2k/7UPeGp 9B4U9X5UXHFAOuVIWyjZggLquGwJ7ruStW4qqjsVuQAocZSXFISXNk8+O cOxo7ZpZaUNKGNqSQvhQSBDDONeVKsOPevPCVlMj/z7rFczvbZVbijz6h g==; X-CSE-ConnectionGUID: 2kyGWZL1RiaFPd0gKTs9Ag== X-CSE-MsgGUID: tc1JRGldRQGQ8bJDxsfXtQ== X-IPAS-Result: =?us-ascii?q?A0AXAQDImddq/5AQJK1QAQkdAQEBAQkBEgEFBQFlgRoFA?= =?us-ascii?q?QsBgW0qKYELgSNJhFeDTAOFK4ZYgiEDnjCBYAoPAQEBDQIuDxQEAQGFBQIWj?= =?us-ascii?q?X8CJjcGDgECBAMCAwEBAQEBAQEBAQEBAQoBAQUBAQECAQcFgQ4Thk8NkBIBA?= =?us-ascii?q?QEBAgEBASERGgsVEAsCAQgYAgIIHgICAiQKARQBEAIEAQcLGwIEgglYAYJNJ?= =?us-ascii?q?wMBAg6qaQKKHXqBMoEBg21BUNs4BoEfLgGFBYNZAYFxiQQnG4INgRUnCxCCa?= =?us-ascii?q?T6CYQEBA4EoAQcBCgEgAYNbOoIwBIIJBBVSOio8BQYuQgEBHBBOCj6CBz5xK?= =?us-ascii?q?jgCgVA1gxeBRiGHawk/CmIWHANZLAFVEw0KCwcFY0IQMwMgCgsSEhgVAhQNI?= =?us-ascii?q?g8aBS0dcAwQFxIPHRcRHlgbBgUSICpBQzIUBBOBGSMZNmuBCV2BKylhAh9GL?= =?us-ascii?q?RWCAgKCUYEjXQIBSUEOB0VTCSVDEkcmIggSCQETGi4LgRo4PAkoQRUMXAsMG?= =?us-ascii?q?gUbTQgCCwIJB2sYDUgRLBQjBg8ZBD0BbgeRRoITJUsvECYBA1MURwINEQUFG?= =?us-ascii?q?iYLCikDDRQFBgUGOpJ0g26vWAqEHowilVQEL4QEjRSYcGeZCCOCNosxlTaBG?= =?us-ascii?q?gGEPQIEAgQFAhABAQaBfiZpcHAVOyoBgggBMz8UGQ+XN8gJeT0CBwIHDgMLk?= =?us-ascii?q?2YBAQ?= IronPort-PHdr: A9a23:2MSRLRwYc0bEh07XCzPsngc9DxPP8539OgoTr50/hK0LLuKo/o/pO wrU4vA+xFPKXICO8/tfkKKWqKHvX2Uc/IyM+G4Pap1CVhIJyI0WkgUsDdTDCBjTJ//xZCt8F 8NHPGI= IronPort-Data: A9a23:579z96KTKOFrPvjlFE+RhJQlxSXFcZb7ZxGr2PjKsXjdYENS1zNVz WMdUWqCP/7fNmCjfop/YIuz8E8CuJGGnNdjQQQd+CA2RRqmiyZq6fd1j6vUF3nPRiEWZBs/t 63yUvGZcoZpCCea+Uf1WlTYhSEU/bmSQbbhA/LzNCl0RAt1IA8skhsLd9QR2uaEuvDnRVnS0 T/Oi5eHYgH8g2clajJ8B5+r8XuDgtyj4Fv0gXRmDRx7lAe2v2UYCpsZOZawIxPQKqFIHvS3T vr017qw+GXU5X8FUrtJRZ6iLyXm6paLVeS/oiI+t5qK23CulQRuukoPD8fwXG8M49m/c3+d/ /0W3XC4YV9B0qQhA43xWTEAe811FfUuFLMqvRFTvOTLp3AqfUcAzN00D1AZAr88o9x2CE92+ aQXCwwWPzmM0rfeLLKTEoGAh+wqKM3teYdasXZ6wHSBUrAtQIvIROPB4towMDUY358VW62AI ZNHL2MzMHwsYDUXUrsTIJ81n+qsjWTXeDxDo1XTrq0yi4TW5FwuiuO9aIKOJLRmQ+1JlR+6n E3C817ALShKPv6z2SGLwm6V07qncSTTHdh6+KeD3v9nm1K7x2EPBlsRT1TTieKli1SWWt9DJ QoT4CVGkEQp3EWvSt+4W1izp2SJ+0ZDHdFRCOY9rgqKz8I4/jqkO4TNdRYYAPQOv84tTjts3 ViM9+4FzxQ22FFJYRpxLoupkA4= IronPort-HdrOrdr: A9a23:X1x9eajBWn2D5z3QWTFmCLzHfXBQXwp23DAbv31ZSRFFG/FwyP re/8jzhCWVtN9OYhAdcIi7Sda9qBPnmaKceeEqTPmftXrdyRWVxeZZnMrfKlzbamLDH4FmpN xdmsRFebnN5B1B/LrHCWqDYpYdKbu8gdqVbI7lph8HI3AJGsRdBkVCe3um+yZNNW977O8CZe KhD7181kOdkBosH6OGL0hAddLu4/fMk5XrawMHARkI1Cmi5AnD1JfKVzKj8lM7ST1g/ZcOmF KpryXJoomzufCyzRHRk1TU84lXn9XZzN5CDtyni8QeKDng4zzYJ7iJXYfsgBkF5MWUrHo6mt jFpBkte+5p7WnKQ22zqRzxnyH9zTcH8RbZuBqlqEqmhfa8aCMxCsJHi44cWADe8VAcsNZ117 8O936FtqBQEQjLkE3Glpz1vlBR5w2JSEgZ4LcuZk9kINMjgXhq3NciFXZuYdE99eTBmdoa+a dVfZzhDb1tACKnhjjizxlSKZqXLzYONybDZFQescqI1DUTtnV4w0wEgPE7pB47hc4Ao10u3Z WbDkyu/4s+EfM+fOZzAvwMTtCwDXGISRXQMHiKKVCiD60fPWnRwqSHq4ncdImRCe81JbYJ6d 38uWljxCYPUlOrDdfL0IxA8xjLTmn4VTPxyttG75w8vrHnXrLkPSCKVVhryqKb0rgiK9yeX+ z2NINdAvflI2erEYFV3xfmU50XLXUFSsUattsyRlrL+qvwW8HXn/2edOyWKKvmED4iVG+6Cn wfXCLrLMEF6kywQHf3jBXYRnuocE3i+pB7FrTc4oEoucIwH5wJthJQhUWy58mNJzEHuqsqfF FmKLeiia+/rXnexxe/04yoAGsrMq942sSVb5oRn355D6rdS8d3h+mi X-Talos-CUID: 9a23:TsoiwGxRUfza65n6WyQ9BgVOGdEKTU/5lU3RKmGABT5ma4GOGHafrfY= X-Talos-MUID: =?us-ascii?q?9a23=3ALSAR9AzoH0n5ifuqHp3dm6QZF4qaqLilUWI3vpE?= =?us-ascii?q?KgfCrDHx6GRuNlzqHXrZyfw=3D=3D?= X-IronPort-Anti-Spam-Filtered: true Received: from alln-l-core-07.cisco.com ([173.36.16.144]) by alln-iport-6.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 20 Oct 2026 16:44:08 +0000 Received: from alln-opgw-4.cisco.com (alln-opgw-4.cisco.com [173.37.147.252]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by alln-l-core-07.cisco.com (Postfix) with ESMTPS id 89AF3180004C3; Tue, 20 Oct 2026 16:44:08 +0000 (GMT) X-CSE-ConnectionGUID: Qx9qCQLlQeeS3Am19YmsMg== X-CSE-MsgGUID: txk3tbFqQRqsdPDxnzLZOQ== X-IronPort-AV: E=Sophos;i="6.27,168,1787011200"; d="scan'208";a="90265944" Received: from mail-centralusazon11010069.outbound.protection.outlook.com (HELO DM1PR04CU001.outbound.protection.outlook.com) ([52.101.61.69]) by alln-opgw-4.cisco.com with ESMTP/TLS/TLS_AES_256_GCM_SHA384; 20 Oct 2026 16:44:08 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Y0VhJmJ2T/DROEiHFjoadlun3ZqvyJXXGa146am+qEwtXrz8tV3iKPLoP92hyV3d4TPQWXRYsmy6hJ0YerNf7PNyv27mKhhz4inqJwgWYFi/WQ88iDGFGPuN+CTfxwTopqf2NTjnkRD5C7058p3gEWK2SQOkZmz7e1bONucT9iqYdttQG1+Wmk5m6Iekqyo9AISzNNDEJtitHxXY+Ew5mE3ntlBQUFF5pK0YNWWId7z/z90xWaEvQ5zV4LPaNjbTPx9i+6Ak13ZX0XF73FsQ+L1r6ScW16AhGtlbrhlcTte8LXV2GGwlywzqUw4gyMmYfCp9ClsVgJ5bTbbSdacnEg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=BXTnRoHHj0i4+oK0RVECldURYJaupXUAdr6MD7j/FiQ=; b=xSjUstZjq7usHlXHadlvWRQWXv7DOVbwlHmC2BASUaJuc/nDfk17Abmt3M/3CU7W8cwTHlAN1cGeVpFk+l9XsFhAtdccPDH8dX+JdoYK5bKEmsacOBmHugCHqLD+Rw8STZcczUefUeGz5NzJJfS+V07q8k4tyegMvPqVTNgDCdzYQTXCfbbR5/8uVUVtEn7fXpHpQuHo99Jl6Zn9xVlm8GOajlhfrAg48pydisjr03j66TypLQvuDr094liMeSi09PHyMHfu/pKqaWxOqtobtOg+V75p7JitzTUHUoRvR+TWGvGDCo0w5vsQRG5T8IDftxg43wRQuMCVnUtyltmvsg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cisco.com; dmarc=pass action=none header.from=cisco.com; dkim=pass header.d=cisco.com; arc=none Received: from PH0PR11MB5048.namprd11.prod.outlook.com (2603:10b6:510:3d::14) by CH4PR11MB629011.namprd11.prod.outlook.com (2603:10b6:610:511::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.546.15; Tue, 20 Oct 2026 16:44:00 +0000 Received: from PH0PR11MB5048.namprd11.prod.outlook.com ([fe80::3ec5:e314:2640:31dc]) by PH0PR11MB5048.namprd11.prod.outlook.com ([fe80::3ec5:e314:2640:31dc%5]) with mapi id 15.21.0522.012; Tue, 20 Oct 2026 16:44:00 +0000 From: "Charles Eckel (eckelcu)" To: "iesg@ietf.org" , "stir@ietf.org Mail List" Thread-Topic: [new-work] WG Review: Secure Telephone Identity Revisited (stir) Thread-Index: AQHdXYX3w3Tl2PbGWU+xJlUkNy63lrcGqVCA Date: Tue, 20 Oct 2026 16:44:00 +0000 Message-ID: <08B622FC-D0F6-4621-9428-65A6E3B383C4@cisco.com> References: <179216575977.610.10276269831760144230@dt-datatracker-7457c9c988-pqlqx> In-Reply-To: <179216575977.610.10276269831760144230@dt-datatracker-7457c9c988-pqlqx> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3901.100.1.1.12) x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PH0PR11MB5048:EE_|CH4PR11MB629011:EE_ x-ms-office365-filtering-correlation-id: cbc170ad-407c-47c3-f63f-08df2ec95785 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230040|23010399003|376014|1800799024|10070799003|4022899009|366016|38070700021|56012099006|11063799006|261009223027099003|10067099003|22082099003|18002099003|6133799003|3023799007; x-microsoft-antispam-message-info: 55rpRXHdyOxsjhRuhfrKWBWdyF2l4OtW8SmVQWzCgMRqz6kd0tKjaL5054H8a6T2iQ4mNGj6enoBLdOcwBipxrw2YFqFw/xaOOJhAq2WxYLxS5BlMR1ZxQcXrpDuWQZicM2XQUo/skFJ+aHGWRFA9MqCLe72JEq3RRBxVPGRkidpUAIgjNcS8FKifpa3kXOjva7ELhkkBaBrVSxolYQ6cSWtnTT/X6qPFfBFzpuRV1HAX0iizbbfUH0MnEm0icD0c+y9XcYFLz7AaJbYLPWdVfNfoaAURrIyD1ZOm2BUQawRFbnJ/rMNDuMqyL2czfKTP+ZoTRgtVj3bFa8+8c2nAsiSO8JmEwczr6rExAIcMloECMU7UqeppBjm7kcdYbuwezPPsQmv0Mk3DHiVlDt2da1bAUlDh8ji3vxbwJ5O/J3kVLhZBg7EgfXzK6OSNXHwhnxS1nvWYc51nU41J09NSJGvhKKUCQaRUc4CiH1RahBTnQKLMyzQU57RlTlecMfpCPQWY3USFWeblQm4gKXUJlJeSBeUDZZAMt18lEORork5zN6zBkGortEp4WslJuilPKdvFiPPGnn823K2HhzT6isZOT3ejP7AkT1GwtUvLS1W9CrgrYg8VB327HAa1GcbCFRYk7T/2rkbsoW0y5bNzNYf1DZJ5JNal3vDWicAVwk= x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR11MB5048.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(23010399003)(376014)(1800799024)(10070799003)(4022899009)(366016)(38070700021)(56012099006)(11063799006)(261009223027099003)(10067099003)(22082099003)(18002099003)(6133799003)(3023799007);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 2 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?M3k3ZlBFY0xoQ0RBL2RELzhFM2pDLzlLRkhwWHV1RHM1dlk0L0xLdzhyYnQx?= =?utf-8?B?WUcwUlpoNVhJQlp0cFpXS0JYbWd1ZjJlbVVDRzRtYmw0ZThGRmVaUFZtUkFr?= =?utf-8?B?UEprZGxnUG01SmlvTXF1ZWJJcFQ4Y05rZGlZYlNVZmVCanZxTURWaUExN1Fn?= =?utf-8?B?SXA3ZnNGbTJqdjN5ODV6ZHdidFZqZS96ZGdyWGFSeE95cmFwVXJ5Sk04N0w0?= =?utf-8?B?aHZvanNRSTlLa1FiTVhyOFpnOThTcWJZbjFmV0JqY3h0dWhoTUZqQyt6WFJ1?= =?utf-8?B?MzVCaFhZcjVNRHZ2VU0vUVpMSXZkanppcW1uVS84Y3ViTnZnL1l1RU9JUnRC?= =?utf-8?B?akdVVjFnN3FaN2xzRnJDcWNibnRwSDZndnByY0EzeSttSHc4bWFHOGV1KzZs?= =?utf-8?B?bVRCTndsTUM1eWt5QU9wWVBpSXlJTytPVWhHeXA5V3pzTUtjYTkxci9LL213?= =?utf-8?B?bmcrVTdvRzN0Ty9mMDA4Q1BYT0hzUS9QWlZ1NWs4ZkRsOWJLWldsMUhHMytz?= =?utf-8?B?ZGJaYzdIK1F1Sm50NFZJL2YvbjNtRFRCY28weStQV1Zac0ZnTXpiLy9GWU02?= =?utf-8?B?cWxzUWFXNDhlUER0RzB0by8wVW5qN2pKaVRiV0lZRWFtR1dWSG45V3B6ZEEv?= =?utf-8?B?RXI0NkY3UzZTUDVrNmZjZ2NISi9oc1BxajBXZGoraGMySDl1ajJEdGpDSmlL?= =?utf-8?B?VVdmdnUvSll2NHAwMGhGa2Vpd1VjR0pQajVKV3crdWtNZDg4QVFyV1liMHJa?= =?utf-8?B?ZG5BMzdnSU9LamlyVUZqelpURkkzbGMyYWR3WnhiSWRRSXdGV0tYUlFtWEVD?= =?utf-8?B?bEpSSDc0UHZNMnlWdnIraGRnVTFUSVJvY09xZnJtMWcySFFxSGNLK2VMZTFp?= =?utf-8?B?T25ybGVPMzBMWm1RZkd3Y3BLTFNVdDRzTi9RVnVGYm1wcWxtQnNhNEM0VmJv?= =?utf-8?B?K2RhRVN3NGVTM2tKN3R6QjhlL1hHNjNxWGhuWTAwanJtK2VkV0xnWFJsY2py?= =?utf-8?B?M051elFrL2oxVE1Gd3U1VFBmYXQyL3ZWM2RCWmtaalhuVXRTNDFkN3VaOGVu?= =?utf-8?B?TTFMYmFhaVNKTnlrdUs5TlZ2Z25VWVc3dWZNZ3B0ek5YeUlqUnZydnZaQ0sw?= =?utf-8?B?OTYwdjg2WGtIQXB1RVJZZTFjdC9WM3lTOVNhR1diVmt3UlJGM0JWVXF3Sy82?= =?utf-8?B?NUZmUmUwS0IrcU5vc1RGa0w1MG1peHBaYXZFNFY4UzZBUU82b0FyeDVDOU5h?= =?utf-8?B?bWJXTU5qN3BLd2VOZGlRd3RvcVlnMjZkUkhUc3lBU2tKc2t2VDE4ZEFNUWY3?= =?utf-8?B?TFJTY2JHd3JZWlhYVjBrMHRiR29wRE9iVDJ4UFNITllHc0QyNGg4Y0VxYjU5?= =?utf-8?B?bTNkaVE4R0o0bk9ZT1ZyVTA1ZDRNSWxYMTRkZ05LeGt1WmJCWlI3ait3SFpj?= =?utf-8?B?RmdIbFdDNEtSdGFtQk1XWHJ3THBhVVlBaXdEUnVReTFaZ0xFNW9iVllGY2V1?= =?utf-8?B?dlM4WTVWM21RajdWOFdLeVFWOWs0TVpxK3czWjlYV1paNVVFdjZFZzRCWmRK?= =?utf-8?B?TE9iWnRRdGdLakhYRnFXOFlqZjd3WllWNEFYaEhkTTVKMkp1L0J6SzFBVUxa?= =?utf-8?B?Vzl0QjVBT3hBdk9UNGFZUmZVM3pwbWdHNHRCc25rRHIrelJuTXhNTTloMzlU?= =?utf-8?B?cUYrTU8vaDFGVFU2ZHJudVRjQS8vc2RZRXAwakJSMSt5M2dwTEhuMFFkcnp4?= =?utf-8?B?dUNmVkJZczZvV2tYclBuVEdaeklWbEF4MkNMVXpPdzRNQnJUNzJ2RkxkWXlB?= =?utf-8?B?MmJxSjc1aXlDSHBPK2lrQ1R3RlVwaVRWbEpza3FZOTVZRjVtNkNrOHNrMTBx?= =?utf-8?B?M3dkSWh1QWZvTU5TSjg3MVVLZUZXcktib25vSDNwbmNHNTd0SHA2L3BpK3li?= =?utf-8?B?aTQvN2FCUWI5TzRKKzA5TXdVVXdqZHVDNFVoODNBTFp3UWdPbFQzekkwQnNh?= =?utf-8?B?dHNLZ1JEQklrM0xhL1Vwc0tPcmpOTHhVaGo1THB6cjFRZTQ4RUtWcml2K1VH?= =?utf-8?B?dnJBNFNxajNmWVhzeGdJcFhCTEtWaUZ1WjUxWHpIdjFhN0JVZTJNQkl3eVc5?= =?utf-8?B?emY3QUh2Z0VzY29IaWdZN0lQaFJyZ2NBanBsbVgzTStRNVRWb1Z2SXBBNzlG?= =?utf-8?B?N0s0VU1yN0xBVHc3aWdUbjd4K2FnSHp4cURwbm15aHNtb1JOQW1pZVVmcm52?= =?utf-8?B?VHl2K0RpcXJxL3FYdWNRTGxaMXRHdmlYdlhTVWxiVmNWM3pYaWYvV21MZktj?= =?utf-8?B?eVZKMmhRVUx6NkhNRDgxYjE2ZWRXZlc2b1NsWVNWUHFKVXdiTHkwQ3dWUDJZ?= =?utf-8?Q?OLgEyuiX8SYS+q11ivfVbIXEyOp6P4NOvCDo/hMcIq7rh?= x-ms-exchange-antispam-messagedata-1: uHJeh9KFSURcfQ== Content-Type: text/plain; charset="utf-8" Content-ID: <26EA1A774C60264280D92A3F4F189C64@namprd11.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Exchange-RoutingPolicyChecked: PS36eu9UFb9Je33o38YAANM+CwrrBH/PMUFKmCsgMJ+XoR/LhU8AVJsWlHu0UyR/ZqPZrkQwIsehmnFpPUF24I5kRQISysQ26tHmcnwc5Vp/pLqEIugfZPL45YVkbbNyrpJjonjSwfbMkpe40Zg9PiiMcFMmAU3+SXvKOAX1vPOuOtU6Vbd1gyqYz5w/QzgqlbTIdFDDTouI+ENnHF+TiM1EefdHQVS0Y1cT9XA0DABog09HLYSEKqrYb3CpnxGCTJuQyZASMfdxles1+LB/IVvSl12wR4C+vweW4nGOIVjApcixpGeBiu2sw175gJAveKq0rwpGxr3yQcZRaonkZw== X-OriginatorOrg: cisco.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR11MB5048.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: cbc170ad-407c-47c3-f63f-08df2ec95785 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Oct 2026 16:44:00.1193 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +yg7dYipCfjLV9PlkooJW7gCwe96dzapPxDDEzimhHS0fq2Cm9peUIIavKNMsikKKFAz9R6huvB3HeSP7eMNnQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH4PR11MB629011 X-Outbound-Client-TLS: ANONYMOUS;alln-opgw-4.cisco.com [173.37.147.252];TLSv1.3;TLS_AES_256_GCM_SHA384;256 X-Outbound-SMTP-Client: 173.37.147.252, alln-opgw-4.cisco.com X-Outbound-Node: alln-l-core-07.cisco.com X-Spamd-Bar: --------------------------------- Message-ID-Hash: PNVXNY5SA2OA3IGSBQ6O224BVAOL6OOP X-Message-ID-Hash: PNVXNY5SA2OA3IGSBQ6O224BVAOL6OOP X-MailFrom: eckelcu@cisco.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-stir.ietf.org-0; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list Subject: [stir] Re: [new-work] WG Review: Secure Telephone Identity Revisited (stir) List-Id: Secure Telephone Identity Revisited Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: SGkgSUVTRyBhbmQgU1RJUiBXRywNCg0KSSBub3RpY2VkIGFuIGluY29uc2lzdGVuY3kgYmV0d2Vl biB0aGUgc2NvcGUgdGV4dCBhbmQgdGhlIG1pbGVzdG9uZXMuDQoNClRoZSBzY29wZSBzYXlzIHRo ZSBXRyDigJx3aWxsIGRlZmluZSBpbmZvcm1hdGlvbmFsIG9yIGV4cGVyaW1lbnRhbCBkb2N1bWVu dHPigJ0gZm9yIChhKSBjZXJ0aWZpY2F0ZSB0cmFuc3BhcmVuY3kgbWVjaGFuaXNtcyBhbmQgKGIp IGV4dGVuc2lvbnMgdG8gb3V0LW9mLWJhbmQgZGlzY292ZXJ5IG1lY2hhbmlzbXMuIEhvd2V2ZXIs IHRoZSBtaWxlc3RvbmVzIGZvciBib3RoIGl0ZW1zIHNwZWNpZnkgUHJvcG9zZWQgU3RhbmRhcmQu IEluIGFkZGl0aW9uLCBkcmFmdC1pZXRmLXN0aXItY2VydGlmaWNhdGUtdHJhbnNwYXJlbmN5LTA0 IGlzIGN1cnJlbnRseSB3aXRoIHRoZSBJRVNHIGFzIGEgUHJvcG9zZWQgU3RhbmRhcmQsIGFuZCB0 aGUgZXhpc3Rpbmcgb3V0LW9mLWJhbmQgYW5kIGNvbm5lY3RlZCBpZGVudGl0eSB3b3JrIChSRkMg OTg4OCwgUkZDIDk5NzApIHdhcyBwdWJsaXNoZWQgYXMgUHJvcG9zZWQgU3RhbmRhcmQuDQoNCkkg cGxhbiB0byB1cGRhdGUgdGhlIHNjb3BlIHRleHQgZm9yIGJvdGggaXRlbXMgdG8gc2F5IHN0YW5k YXJkcy10cmFjay4gSWYg4oCcaW5mb3JtYXRpb25hbCBvciBleHBlcmltZW50YWzigJ0gd2FzIGlu dGVuZGVkIGZvciBlaXRoZXIgaXRlbSwgd2UgY2FuIGFkanVzdCB0aGUgY29ycmVzcG9uZGluZyBt aWxlc3RvbmUgaW5zdGVhZC4NCg0KQ2hlZXJzLA0KQ2hhcmxlcw0KDQo+IE9uIE9jdCAxNiwgMjAy NiwgYXQgODo0OeKAr0FNLCBUaGUgSUVTRyA8aWVzZ0BpZXRmLm9yZz4gd3JvdGU6DQo+IA0KPiBU aGUgU2VjdXJlIFRlbGVwaG9uZSBJZGVudGl0eSBSZXZpc2l0ZWQgKHN0aXIpIFdHIGluIHRoZSBB cHBsaWNhdGlvbnMgYW5kDQo+IFJlYWwtVGltZSBBcmVhIG9mIHRoZSBJRVRGIGlzIHVuZGVyZ29p bmcgcmVjaGFydGVyaW5nLiBUaGUgSUVTRyBoYXMgbm90IG1hZGUNCj4gYW55IGRldGVybWluYXRp b24geWV0LiBUaGUgZm9sbG93aW5nIGRyYWZ0IGNoYXJ0ZXIgd2FzIHN1Ym1pdHRlZCwgYW5kIGlz DQo+IHByb3ZpZGVkIGZvciBpbmZvcm1hdGlvbmFsIHB1cnBvc2VzIG9ubHkuIFBsZWFzZSBzZW5k IHlvdXIgY29tbWVudHMgdG8gdGhlDQo+IElFU0cgbWFpbGluZyBsaXN0IChpZXNnQGlldGYub3Jn KSBieSAyMDI2LTEwLTI2Lg0KPiANCj4gU2VjdXJlIFRlbGVwaG9uZSBJZGVudGl0eSBSZXZpc2l0 ZWQgKHN0aXIpDQo+IC0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQo+IEN1cnJlbnQgc3RhdHVzOiBBY3RpdmUgV0cN Cj4gDQo+IENoYWlyczoNCj4gIEJlbiBDYW1wYmVsbCA8YmVuQG5vc3RydW0uY29tPg0KPiAgUnVz cyBIb3VzbGV5IDxob3VzbGV5QHZpZ2lsc2VjLmNvbT4NCj4gDQo+IEFzc2lnbmVkIEFyZWEgRGly ZWN0b3I6DQo+ICBDaGFybGVzIEVja2VsIDxlY2tlbGN1QGNpc2NvLmNvbT4NCj4gDQo+IEFwcGxp Y2F0aW9ucyBhbmQgUmVhbC1UaW1lIEFyZWEgRGlyZWN0b3JzOg0KPiAgQW5keSBOZXd0b24gPGFu ZHlAaHhyLnVzPg0KPiAgQ2hhcmxlcyBFY2tlbCA8ZWNrZWxjdUBjaXNjby5jb20+DQo+IA0KPiBN YWlsaW5nIGxpc3Q6DQo+ICBBZGRyZXNzOiBzdGlyQGlldGYub3JnDQo+ICBUbyBzdWJzY3JpYmU6 IGh0dHBzOi8vd3d3LmlldGYub3JnL21haWxtYW4vbGlzdGluZm8vc3Rpcg0KPiAgQXJjaGl2ZTog aHR0cHM6Ly9tYWlsYXJjaGl2ZS5pZXRmLm9yZy9hcmNoL2Jyb3dzZS9zdGlyLw0KPiANCj4gR3Jv dXAgcGFnZTogaHR0cHM6Ly9kYXRhdHJhY2tlci5pZXRmLm9yZy9ncm91cC9zdGlyLw0KPiANCj4g Q2hhcnRlcjogaHR0cHM6Ly9kYXRhdHJhY2tlci5pZXRmLm9yZy9kb2MvY2hhcnRlci1pZXRmLXN0 aXIvDQo+IA0KPiAjIyBCYWNrZ3JvdW5kIGFuZCBQcm9ibGVtIFN0YXRlbWVudA0KPiANCj4gVGhl IFNlY3VyZSBUZWxlcGhvbmUgSWRlbnRpdHkgUmV2aXNpdGVkIChTVElSKSBXb3JraW5nIEdyb3Vw IHNwZWNpZmllcw0KPiBJbnRlcm5ldC1iYXNlZCBtZWNoYW5pc21zIHRoYXQgYWxsb3cgdmVyaWZp Y2F0aW9uIG9mIHRoZSBhdXRob3JpemF0aW9uIHRvIHVzZQ0KPiBhIHBhcnRpY3VsYXIgdGVsZXBo b25lIG51bWJlciB0aHJvdWdoIGNyeXB0b2dyYXBoaWMgYXV0aGVudGljYXRpb24uIFRoZXNlDQo+ IG1lY2hhbmlzbXMgYXJlIHdpZGVseSBkZXBsb3llZCBpbiBTSVAtYmFzZWQgdGVsZXBob255IG5l dHdvcmtzIGFuZCBhcmUgdXNlZA0KPiB0byBtaXRpZ2F0ZSBpbXBlcnNvbmF0aW9uLCBzcG9vZmlu ZywgYW5kIG90aGVyIGZvcm1zIG9mIHVud2FudGVkIG9yDQo+IGZyYXVkdWxlbnQgY29tbXVuaWNh dGlvbnMuDQo+IA0KPiBPcGVyYXRpb25hbCBleHBlcmllbmNlIGhhcyByZXZlYWxlZCB0aGF0IHdo aWxlIFNUSVIgZWZmZWN0aXZlbHkgYXV0aGVudGljYXRlcw0KPiB0aGUgZXZlbnQgb2YgYSBjYWxs IGFuZCB0aGUgYXV0aG9yaXphdGlvbiB0byB1c2UgYSB0ZWxlcGhvbmUgbnVtYmVyLCBpdCBkb2Vz DQo+IG5vdCBwcm92aWRlIGEgbWVhbnMgdG8gaWRlbnRpZnkgdGhlIGVudGl0eSBiZWhpbmQgdGhh dCBhdXRob3JpemF0aW9uLg0KPiBUZWxlcGhvbmUgbnVtYmVycyBhcmUgYXNzaWduZWQgdG8gZW50 aXRpZXMgdGhhdCBtYXkgdXNlIHRoZW0gdGhyb3VnaCBtdWx0aXBsZQ0KPiBzZXJ2aWNlcyBvciBw cm92aWRlcnMgYWN0aW5nIG9uIHRoZWlyIGJlaGFsZiwgYW5kIHZlcmlmaWVycyBoYXZlIG5vDQo+ IHN0YW5kYXJkaXplZCB3YXkgdG8gZGV0ZXJtaW5lIHdoaWNoIGVudGl0eSBhIGRlbGVnYXRlIGNl cnRpZmljYXRlIHJlcHJlc2VudHMuDQo+IEFkZGl0aW9uYWxseSwgZXhpc3RpbmcgbWVjaGFuaXNt cyBkbyBub3QgcHJvdmlkZSB0cmFuc3BhcmVuY3kgaW50byBjcmVkZW50aWFsDQo+IGlzc3VhbmNl LiBUaGlzIHJlY2hhcnRlcmluZyBleHRlbmRzIHRoZSBXb3JraW5nIEdyb3VwJ3Mgc2NvcGUgdG8g YWRkcmVzcw0KPiB0aGVzZSBnYXBzIHdoaWxlIHByZXNlcnZpbmcgY29tcGF0aWJpbGl0eSB3aXRo IGV4aXN0aW5nIGRlcGxveW1lbnRzIGFuZCB0aGUNCj4gU1RJUiB0cnVzdCBtb2RlbC4NCj4gDQo+ ICMjIFNjb3BlIG9mIFdvcmsNCj4gDQo+IFRoZSBTVElSIFdvcmtpbmcgR3JvdXAgd2lsbCBjb250 aW51ZSB0byBzcGVjaWZ5IGFuZCBtYWludGFpbiB0aGUgYmFzZWxpbmUNCj4gcHJvdG9jb2xzIGZv ciBjcnlwdG9ncmFwaGljIGF1dGhlbnRpY2F0aW9uIG9mIHRlbGVwaG9uZSBjYWxsaW5nIHBhcnR5 DQo+IGluZm9ybWF0aW9uIHVzaW5nIFBBU1Nwb3JUIGFuZCByZWxhdGVkIG1lY2hhbmlzbXMuDQo+ IA0KPiBUaGUgV29ya2luZyBHcm91cCB3aWxsIGRlZmluZSBzdGFuZGFyZHMtdHJhY2sgZG9jdW1l bnRzIHRvIHByb3ZpZGUgYSBtZWFucyB0bw0KPiBhc3NvY2lhdGUgYSBQQVNTcG9yVCB3aXRoIGFu IGlkZW50aWZpZXIgcmVwcmVzZW50aW5nIHRoZSBlbnRpdHkgaG9sZGluZyB0aGUNCj4gcmlnaHQg dG8gdXNlIGFuIGFzc2lnbmVkIHRlbGVwaG9uZSBudW1iZXIsIGFuZCB3aWxsIGRvY3VtZW50IHRo ZSBwcml2YWN5DQo+IGltcGxpY2F0aW9ucyBvZiBleHBvc2luZyBzdWNoIGFuIGFzc29jaWF0aW9u LCBjb25zaXN0ZW50IHdpdGggdGhlIGd1aWRhbmNlIGluDQo+IFJGQyA2OTczLg0KPiANCj4gVGhl IFdvcmtpbmcgR3JvdXAgd2lsbCBkZWZpbmUgaW5mb3JtYXRpb25hbCBvciBleHBlcmltZW50YWwg ZG9jdW1lbnRzIHRvDQo+IHByb3ZpZGUgY2VydGlmaWNhdGUgdHJhbnNwYXJlbmN5IG1lY2hhbmlz bXMgZm9yIHRlbGVwaG9uZSBpZGVudGl0eQ0KPiBjcmVkZW50aWFscyB0aGF0IGltcHJvdmUgYXVk aXRhYmlsaXR5IGFuZCBzdXBwb3J0IGRldGVjdGlvbiBvZiBtaXNpc3N1YW5jZQ0KPiB3aXRoaW4g dGhlIFNUSVIgZWNvc3lzdGVtLg0KPiANCj4gVGhlIFdvcmtpbmcgR3JvdXAgd2lsbCBkZWZpbmUg aW5mb3JtYXRpb25hbCBvciBleHBlcmltZW50YWwgZG9jdW1lbnRzIHRvDQo+IGV4dGVuZCBleGlz dGluZyBvdXQtb2YtYmFuZCBtZWNoYW5pc21zIGZvciB0aGUgZGlzY292ZXJ5IG9mIFNUSVIgY3Jl ZGVudGlhbHMNCj4gYW5kIHNlcnZpY2VzIGFzc29jaWF0ZWQgd2l0aCB0ZWxlcGhvbmUgbnVtYmVy cywgaW5jbHVkaW5nIHRoZSBhcHBsaWNhdGlvbiBvZg0KPiBjb25uZWN0ZWQgaWRlbnRpdHkgaW4g c2NlbmFyaW9zIHdoZXJlIFNJUCBzaWduYWxpbmcgaXMgbm90IGVuZC10by1lbmQuIFRoZQ0KPiBX b3JraW5nIEdyb3VwIHdpbGwgY29uc2lkZXIgZXh0ZW5zaW9ucyB0aGF0IHN1cHBvcnQgdGhlIHVz ZSBvZiBhdXRoZW50aWNhdGVkDQo+IHRlbGVwaG9uZSBpZGVudGl0eSBpbiBvdGhlciBjb21tdW5p Y2F0aW9ucyBjb250ZXh0cywgaW5jbHVkaW5nIG1lc3NhZ2luZy4NCj4gDQo+IFRoZSBXb3JraW5n IEdyb3VwIHdpbGwgY29udGludWUgdG8gbGV2ZXJhZ2UgZXhpc3RpbmcgSW50ZXJuZXQgc2VjdXJp dHkNCj4gbWVjaGFuaXNtcywgaW5jbHVkaW5nIFBLSSwgYW5kIHdpbGwgY29vcmRpbmF0ZSB3aXRo IG90aGVyIElFVEYgd29ya2luZyBncm91cHMNCj4gYXMgYXBwcm9wcmlhdGUuIEl0IHdpbGwgYWxz byBjb250aW51ZSB0byBjb29yZGluYXRlIHdpdGggZXh0ZXJuYWwgc3RhbmRhcmRzDQo+IGJvZGll cyBzdWNoIGFzIHRoZSBBbGxpYW5jZSBmb3IgVGVsZWNvbW11bmljYXRpb25zIEluZHVzdHJ5IFNv bHV0aW9ucyAoQVRJUykNCj4gYW5kIHRoZSBTSVAgRm9ydW0gb24gdGhlIGltcGxlbWVudGF0aW9u IGFuZCBkZXBsb3ltZW50IG9mIFNUSVIgbWVjaGFuaXNtcw0KPiAoZS5nLiwgU0hBS0VOKS4NCj4g DQo+ICMjIE91dCBvZiBTY29wZQ0KPiANCj4gVGhlIGZvbGxvd2luZyBpdGVtcyBhcmUgb3V0IG9m IHNjb3BlIGZvciB0aGUgU1RJUiBXb3JraW5nIEdyb3VwOg0KPiANCj4gLSBEZWZpbml0aW9uIG9m IGp1cmlzZGljdGlvbmFsIG9yIGxlZ2FsIHBvbGljeSB0b3BpY3MsIGluY2x1ZGluZyB2ZXR0aW5n DQo+IHBvbGljaWVzLCByZWd1bGF0b3J5IHJlcXVpcmVtZW50cywgZ292ZXJuYW5jZSwgb3IgYXV0 aG9yaXphdGlvbiBmcmFtZXdvcmtzLiAtDQo+IERlZmluaXRpb24gb2YgZ292ZXJuYW5jZSByZXF1 aXJlbWVudHMgZm9yIG51bWJlcmluZyBhdXRob3JpdGllcywgY2VydGlmaWNhdGUNCj4gYXV0aG9y aXRpZXMsIG9yIHRyYW5zcGFyZW5jeSBzZXJ2aWNlcy4gLSBSZXZpc2l0aW5nIHRoZSB0cnVzdCBt b2RlbCBmb3IgdGhlDQo+IGNvcmUgZmlyc3QtcGFydHkgYXNzZXJ0aW9uIHRoYXQgYmluZHMgYSB0 ZWxlcGhvbmUgbnVtYmVyIHRvIGEgY2FsbCwgdGhlDQo+IGFzc3VyYW5jZSB0aGF0IHRoZSBjYWxs aW5nIG51bWJlciBpcyBub3Qgc3Bvb2ZlZC4gVGhpcyBhc3NlcnRpb24gcmVsaWVzIG9uDQo+IHRo ZSBleGlzdGluZyBjZXJ0aWZpY2F0ZS1iYXNlZCwgYWRtaW5pc3RyYXRpdmVseS1nb3Zlcm5lZCBt b2RlbCwgcmVnYXJkbGVzcw0KPiBvZiB0aGUgY2VydGlmaWNhdGUgcHJvZmlsZSB1c2VkLCBhbmQg YWx0ZXJuYXRpdmUgdHJ1c3QgYW5jaG9ycyBvcg0KPiBub24tY2VydGlmaWNhdGUgaWRlbnRpZmll ciBtZWNoYW5pc21zIGZvciB0aGlzIGNvcmUgYmluZGluZyBhcmUgb3V0IG9mIHNjb3BlLg0KPiBD aGFuZ2luZyB0aGlzIGRlcGVuZGVuY2Ugb24gdGhlIGNlcnRpZmljYXRlLWJhc2VkIGFwcHJvYWNo IHdvdWxkIHJlcXVpcmUgYQ0KPiBmdXR1cmUgcmVjaGFydGVyLiBUaGlzIGRvZXMgbm90IGNvbnN0 cmFpbiBzZXBhcmF0ZSBzaWduZXJzIG9mIGF1eGlsaWFyeSBvcg0KPiBzdXBwbGVtZW50YXJ5IGlu Zm9ybWF0aW9uIGFzc29jaWF0ZWQgd2l0aCBhIGNhbGwsIHByb3ZpZGVkIHN1Y2ggaW5mb3JtYXRp b24NCj4gcmVtYWlucyBib3VuZCB0byBhbmQgc3Vib3JkaW5hdGUgdG8gYSBmaXJzdC1wYXJ0eSBh c3NlcnRpb24gd2l0aGluIHRoZQ0KPiBjZXJ0aWZpY2F0ZS1iYXNlZCB0cnVzdCBtb2RlbC4gLSBB bnkgbWVjaGFuaXNtIHJlcXVpcmluZyBjaGFuZ2VzIHRvDQo+IGNpcmN1aXQtc3dpdGNoZWQgdGVs ZXBob255IHRlY2hub2xvZ2llcy4NCj4gDQo+IE1pbGVzdG9uZXM6DQo+IA0KPiAgIC0gU3VibWl0 IGEgZG9jdW1lbnQgdGhhdCBkZWZpbmVzIGEgbWVjaGFuaXNtIGZvciBhc3NvY2lhdGluZyBhIFBB U1Nwb3JUDQo+ICAgd2l0aCBhbiBlbnRpdHkgaWRlbnRpZmllciB0byB0aGUgSUVTRyBmb3IgcHVi bGljYXRpb24gYXMgYSBQcm9wb3NlZA0KPiAgIFN0YW5kYXJkLg0KPiANCj4gICAtIFN1Ym1pdCBh IGRvY3VtZW50IHRoYXQgZGVmaW5lcyBhIGNlcnRpZmljYXRlLXRyYW5zcGFyZW5jeSBtZWNoYW5p c20gZm9yDQo+ICAgdGVsZXBob25lIGlkZW50aXR5IGNyZWRlbnRpYWxzIHRvIHRoZSBJRVNHIGZv ciBwdWJsaWNhdGlvbiBhcyBhIFByb3Bvc2VkDQo+ICAgU3RhbmRhcmQuDQo+IA0KPiAgIC0gU3Vi bWl0IGEgZG9jdW1lbnQgdG8gdXNlIG9yIGV4dGVuZCBleGlzdGluZyBtZWNoYW5pc21zIHRvIHN1 cHBvcnQNCj4gICBvdXQtb2YtYmFuZCBkaXNjb3Zlcnkgb2YgU1RJUiBjcmVkZW50aWFscyBhbmQg c2VydmljZXMsIGluY2x1ZGluZw0KPiAgIGNvbm5lY3RlZCBpZGVudGl0eSwgdG8gdGhlIElFU0cg Zm9yIHB1YmxpY2F0aW9uIGFzIGEgUHJvcG9zZWQgU3RhbmRhcmQuDQo+IA0KPiANCj4gDQo+IF9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQo+IG5ldy13b3Jr IG1haWxpbmcgbGlzdCAtLSBuZXctd29ya0BpZXRmLm9yZw0KPiBUbyB1bnN1YnNjcmliZSBzZW5k IGFuIGVtYWlsIHRvIG5ldy13b3JrLWxlYXZlQGlldGYub3JnDQoNCg==