Re: [ietf-smtp] Public Key Look Up
Richard Clayton <richard@highwayman.com> Thu, 13 May 2021 09:34 UTC
Return-Path: <richard@highwayman.com>
X-Original-To: ietf-smtp@ietfa.amsl.com
Delivered-To: ietf-smtp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DA3D3A315D for <ietf-smtp@ietfa.amsl.com>; Thu, 13 May 2021 02:34:25 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GzpJyLmTkDiz for <ietf-smtp@ietfa.amsl.com>; Thu, 13 May 2021 02:34:20 -0700 (PDT)
Received: from mail.highwayman.com (mail.highwayman.com [82.69.6.249]) (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 C29CE3A3158 for <ietf-smtp@ietf.org>; Thu, 13 May 2021 02:34:20 -0700 (PDT)
Received: from localhost ([127.0.0.1]:52502 helo=happyday.al.cl.cam.ac.uk) by mail.highwayman.com with esmtp (Exim 4.94.2) (envelope-from <richard@highwayman.com>) id 1lh7jU-000JJq-RW for ietf-smtp@ietf.org; Thu, 13 May 2021 09:34:16 +0000
Message-ID: <g5JroVBVJPngFAlS@highwayman.com>
Date: Thu, 13 May 2021 10:33:09 +0100
To: ietf-smtp@ietf.org
From: Richard Clayton <richard@highwayman.com>
References: <20210511185543.C751179052B@ary.qy> <D7EABCF7E8976BE735927C69@PSB> <79ed2289-80af-5744-86f1-6d7a13b730ab@tana.it> <676285.1620837061@turing-police> <b523cf8a-d57c-593e-ffe6-07cb794f82e2@dcrocker.net> <a0d3aecc-d36e-3a16-3bdc-7ca6f2bca5c0@tana.it> <5a22f7bf-8e92-21e9-f86b-7a624014c91c@dcrocker.net> <2ab882c0-35e8-9098-bd02-48cf1cb314fb@tana.it>
In-Reply-To: <2ab882c0-35e8-9098-bd02-48cf1cb314fb@tana.it>
MIME-Version: 1.0
X-Mailer: Turnpike Integrated Version 5.03 M <Ti9$+f9b77fPDPKLdaR+deFnQb>
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf-smtp/h26zrXCTTFucX38RgdVM0oUcvCw>
Subject: Re: [ietf-smtp] Public Key Look Up
X-BeenThere: ietf-smtp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Discussion of issues related to Simple Mail Transfer Protocol \(SMTP\) \[RFC 821, RFC 2821, RFC 5321\]" <ietf-smtp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf-smtp>, <mailto:ietf-smtp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf-smtp/>
List-Post: <mailto:ietf-smtp@ietf.org>
List-Help: <mailto:ietf-smtp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf-smtp>, <mailto:ietf-smtp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 13 May 2021 09:34:25 -0000
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 In message <2ab882c0-35e8-9098-bd02-48cf1cb314fb@tana.it>, Alessandro Vesely <vesely@tana.it> writes >Right. Anyway, if I encrypted something using your DKIM public key, you could >easily decrypt it using the private key. please don't do that -- from a legal standpoint when resisting attempts by Law Enforcement to request private keys, it puts you on very strong ground to argue that a key has only ever been used for authentication rather than encryption also, by using the same key for different purposes you increase the risk of chosen protocol attacks and other bad things happening, which is why expert advice is to always to avoid loading the gun, even if you are promising never to point it anywhere near your lower extremities - -- richard Richard Clayton Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755 -----BEGIN PGP SIGNATURE----- Version: PGPsdk version 1.7.1 iQA/AwUBYJzyVd2nQQHFxEViEQLitwCfcZ3a2VwCSDavft0RZT/23GQoMBYAn1+D dXzhuvda4SxzC5YZ+7PZBcrI =wRnf -----END PGP SIGNATURE-----
- Re: [ietf-smtp] Public Key Look Up Jeremy Harris
- [ietf-smtp] Public Key Look Up patrick.peisker
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up Dave Crocker
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up Dave Crocker
- Re: [ietf-smtp] Public Key Look Up John R Levine
- Re: [ietf-smtp] Public Key Look Up Valdis Kl ē tnieks
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up Dave Crocker
- Re: [ietf-smtp] Public Key Look Up Dave Crocker
- Re: [ietf-smtp] Public Key Look Up Ned Freed
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up Alessandro Vesely
- Re: [ietf-smtp] Public Key Look Up Richard Clayton
- Re: [ietf-smtp] Public Key Look Up Matthias Leisi
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up John R Levine
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up Gene Hightower
- Re: [ietf-smtp] Public Key Look Up Gene Hightower
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up Gene Hightower
- Re: [ietf-smtp] Public Key Look Up John C Klensin
- Re: [ietf-smtp] Public Key Look Up Matthias Leisi
- Re: [ietf-smtp] Public Key Look Up John Levine
- Re: [ietf-smtp] Public Key Look Up patrick.peisker