[TLS] Re: WG Last Call: draft-ietf-tls-mlkem-05 (Ends 2025-11-26)

Peter Gutmann <pgut001@cs.auckland.ac.nz> Thu, 27 November 2025 10:45 UTC

Return-Path: <pgut001@cs.auckland.ac.nz>
X-Original-To: tls@mail2.ietf.org
Delivered-To: tls@mail2.ietf.org
Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id B22B791A3AC0; Thu, 27 Nov 2025 02:45:00 -0800 (PST)
X-Virus-Scanned: amavisd-new at ietf.org
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: mail2.ietf.org (amavisd-new); dkim=pass (2048-bit key) header.d=cs.auckland.ac.nz
Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id P2yv_MoV0yfF; Thu, 27 Nov 2025 02:44:59 -0800 (PST)
Received: from SY5PR01CU010.outbound.protection.outlook.com (mail-australiaeastazon11022076.outbound.protection.outlook.com [40.107.40.76]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail2.ietf.org (Postfix) with ESMTPS id 484EE91A3ABB; Thu, 27 Nov 2025 02:44:58 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=X1n4qzlLDWSAPapm7NzPfQpHb3QJlnsAJErEyhDSovHq4N01Xpd09090BDJVc0qNfxRpUdRpf0dDH39Nvi0t7ZPbDKpPwc3i/f0A7e37HMYGVhNBSOlwMFQp/SH7QihfT/VT5+bc70cMyg3z6m4eMUYCyMg8ugpigbL/cz4N1r93eZkMLZCwwsU7v8Cy+hJH1L4oy2am7RtcTDRs4PQbOEXj5sDD3XFbl0Pw1+rT6yUJxR3ZgKwo/D+PLgF0c2LPiWUWJFYO00rorwPZnszlgYyp2kRsRg0CelIRnHlGSsm0DAdpPQVnFylFsD0qR0J6w5d2pmJr8vaT4HpSqHYegg==
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=lLSaQtQNuoVwfCgSl0iIjvDi5JHT4U7lAwp+cc8BdK8=; b=gvvo/X5+5FRF79MNyaTySA+vXv0TyIl5kbbe/9BTRBPV2nCnCojJiglaeN029vAWh/7UAs2c3/uI2/Om3+LiJwS7EQTFgBQvxngzBr8/ZeIjCjjquFY8drUm3/SAgBICBtAp9halKZRPaRgZ+bTMqFIA/QSKirx9Qp4yjziaEUZTU8SQ8LxQpAyV02emiGPF9IPlZhf980tMPI6twd3xDpPBpPkBtbz7LEjTmGYzQ8HcGMqj3DvVopcmNIRLk5UhBIWkn4RvVk5UvPODhm+9R3YSd0LiRmZsIONFKoJ1n7FW2bPV+yWXGOUSNAFj0Ot354H+fg9nA2U53NaprfuiFQ==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cs.auckland.ac.nz; dmarc=pass action=none header.from=cs.auckland.ac.nz; dkim=pass header.d=cs.auckland.ac.nz; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.auckland.ac.nz; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lLSaQtQNuoVwfCgSl0iIjvDi5JHT4U7lAwp+cc8BdK8=; b=cn2pYzCtOpnOQHbmA9lz3kPjSSE9ilEYvMlkHq96BNJysTPdwKuWwjvwfIB9VQ9MruFVDZTwFdqjymrhobejw4hAOBCfSdSNMEs96WCzvk+XUjyFECGmWHU54BlRQeMHjhJTVYd1eJlzNX6W7lDB8H+cg2bXhp17KffzY4xUvsL5Fc6AH9Gg4iszlpQF4lzF2VRbfnjP2P5BGeV/SKaSy4Iip6mG1/mndVfv41++of3VOdWxIx368hOVH/zZR6raqDvcjkRn61hsEl/Dcf0XTuD4ZiGRu88Q+DoesjA6wWz130SeijAGxy1QpD0b2yfgRIRLn+jLwh9tjjJIGMp/9w==
Received: from SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM (2603:10c6:10:295::14) by SY8P300MB0204.AUSP300.PROD.OUTLOOK.COM (2603:10c6:10:25f::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9366.13; Thu, 27 Nov 2025 10:44:47 +0000
Received: from SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM ([fe80::92f2:d152:ed85:d49f]) by SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM ([fe80::92f2:d152:ed85:d49f%4]) with mapi id 15.20.9366.012; Thu, 27 Nov 2025 10:44:47 +0000
From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: "D. J. Bernstein" <djb@cr.yp.to>, "draft-ietf-tls-mlkem@ietf.org" <draft-ietf-tls-mlkem@ietf.org>, "tls-chairs@ietf.org" <tls-chairs@ietf.org>, "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] Re: WG Last Call: draft-ietf-tls-mlkem-05 (Ends 2025-11-26)
Thread-Index: AQHcXZdtuGkaMo7PaEWn1P+LJAhpz7UDCVkAgAGiOACAADuQgIAANTQAgAA2BYCAAAmQAIAAElEAgADoWAw=
Date: Thu, 27 Nov 2025 10:44:47 +0000
Message-ID: <SY8P300MB07118784448878E70BE2DA15EEDFA@SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM>
References: <aSdWDFHAW2GxiiCa@akamai.com> <20251126203906.367661.qmail@cr.yp.to>
In-Reply-To: <20251126203906.367661.qmail@cr.yp.to>
Accept-Language: en-NZ, en-US
Content-Language: en-NZ
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
msip_labels:
authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=cs.auckland.ac.nz;
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SY8P300MB0711:EE_|SY8P300MB0204:EE_
x-ms-office365-filtering-correlation-id: a1623987-d7e9-4565-51e0-08de2da1fbe8
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;ARA:13230040|10070799003|1800799024|366016|376014|38070700021;
x-microsoft-antispam-message-info: WTlByNZnjY5smJT9vZ4aX7slno/JAzjjy9td6k6Hzzo0JHNxxH6Ytsb2hRDbaTEqXka5OxIJklfOSblPomAXX4arpk3ijeq0lsAFIzxLw1W7q33EY73oZsca907yAVQsO+zssyL4JGCkS61nNpgaUB82HX0c9/tHpfBhy3mSIH0LXAfoIr8T3dAVjSbJ8Wf508TgvGBKtJsqdv3IN+icUo8KYhHKukmc66tB60RnobvqK/TED1hn/gi/p1itoK5gu9uPXPVU+I/ZMR6xcfqK3BAfPk4HgRZylD8iXJqC7zYC/5BpEntDtyFiZ2TIq3apIYeh+QY1aPuNKeSUX+HJbqMmPsm8/p6d8d08WFqEuAOovKSVLWVOrlbMlo7XdvrR7nHBpIVm5n0eZrJcBlC88HVkrABiXUjvxUXzroWk6xto/Vqtqn7btAXJGLblP99+0S5HsfKL3e6jv62zT7jlgfsBdejssrL1FDnGLSogR+9nf3mCvl6HJkn0QgFZ4t+6H2W7bAAGQI0yRuRShnrNEpZWr9GGUPFz1EXdYyduotWhTOhzqR2igQvwcf9EmA0HOf7Zg4XBx69jSlm5glSELIp7MqaMPPV91sMJsiyj6vEgNzqDUV7alkqARP6vxihm5zHFqXfxzgGb5UOYCAocBMOseIBVYYYJ0nVo8XhU6PgAIuX3sJN1J6vkF3A1QOq1YvkjqswPNUlsW515V03/bQui+EQHcUdrKEpcL7jwRdfsmSp6OtZS+Xt0wSKMWy7ChbEjMjzKvX/vNqok5qxGHQJcWn1Eh3Gs7sDk81R51b2kYGy4rDVmHStBM+3YAjTO8soL+OuIL2Hu4y+tIVhsNpooEn7Y5p1bJXEoSBNej481PkoQ3a8UejMv/MeR6q1rvGOyTX3ccOYVf0UDB8b/wXt6z1cGavpM/3Vr+krnMeRO8TURFQl7x4b1Epu0o9rJ/Q8vVhxoh3muTcKFg7ros6hZtFq1SeDOq0eGmZ/bou3t7+YwYoI7KQr+8R59/7+nvGngfQXfk7wiZ39VCyKit+3wnmhznGsTyfrXd0KCQSOqqNazOwIPUCD/a2LvaPKnr4cI4KAaldNllYHJF25hhehtIsHCAIanhWLuUoZV3mDq8MtL+jNM2bV0ZqZw78COcKEMSUignmQqir1hrx/6QnL+vXNzpaQiTnJRVjDOXACIc8Hj3mO4RGlEw05x4IrVFVIGYCmJzxG3gGfwgWy0E/Kw4j+iQiDJIQWZyt22wLAZ6QahWLKn2fE08ULO5ONMBGlI8ZCHlWJo6bvIe5lutU9w4sVQ9zL+E2QPZwVUsDEyDhP8fwcbBN2v6of/yjJNqoaNW/mbSOF32y3IUmZO8f9A13e1WhrFf6R/NFn7RcZyjNu0Yx/HuU4p+6xt+aJzITksuMjQwux1vmu8R7jWhvrCNeysKhA/0xhfmTWXdsXGXEeq6Ri9R2aC7n1OwuqyuMRNgnfqENDCLSEF9Gj0UEMeao0XOLwj9HXFmzG2xfCxqMW5XCbdIszKSl3LhsSd
x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(10070799003)(1800799024)(366016)(376014)(38070700021);DIR:OUT;SFP:1102;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: 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
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: cs.auckland.ac.nz
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SY8P300MB0711.AUSP300.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-Network-Message-Id: a1623987-d7e9-4565-51e0-08de2da1fbe8
X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Nov 2025 10:44:47.2354 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: d1b36e95-0d50-42e9-958f-b63fa906beaa
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: vNCl3niRBPS58DhaKJktV2CFIxvamnEFiuOt2/GDgBAyrwWqDlUAgjM3hpVjDCCrII64F4dETazeUiqO0QSq/z3710+C02eUMSMcz6Bwxtc=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SY8P300MB0204
Message-ID-Hash: 7GCZWYLQ7P6QLTRMWBCVVXT5SWBDNS56
X-Message-ID-Hash: 7GCZWYLQ7P6QLTRMWBCVVXT5SWBDNS56
X-MailFrom: pgut001@cs.auckland.ac.nz
X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tls.ietf.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header
X-Mailman-Version: 3.3.9rc6
Precedence: list
Subject: [TLS] Re: WG Last Call: draft-ietf-tls-mlkem-05 (Ends 2025-11-26)
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/qSDz5r7rj-rYYkfYfWAYeDvgAi8>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tls>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Owner: <mailto:tls-owner@ietf.org>
List-Post: <mailto:tls@ietf.org>
List-Subscribe: <mailto:tls-join@ietf.org>
List-Unsubscribe: <mailto:tls-leave@ietf.org>

D. J. Bernstein <djb@cr.yp.to> writes:

>since a 16-bit MSP430X takes

AFAIK you can't actually do TLS on an MSP430, particularly if you want to do
anything else alongside it, what you do is hang an ARM-based network processor
like a CC3100 off the side of it.  So the question is actually what impact it
has on a Cortex M3.

Peter.

===== NOTICES =====

UN-altered REPRODUCTION and DISSEMINATION of this IMPORTANT Information is
ENCOURAGED.