Re: [ietf-smtp] Public Key Look Up

Alessandro Vesely <vesely@tana.it> Thu, 13 May 2021 07:20 UTC

Original-From: Alessandro Vesely <vesely@tana.it>
To: dcrocker@bbiw.net, ietf-smtp@ietf.org
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>
From: Alessandro Vesely <vesely@tana.it>
Message-ID: <2ab882c0-35e8-9098-bd02-48cf1cb314fb@tana.it>
Date: Thu, 13 May 2021 09:20:09 +0200
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Subject: Re: [ietf-smtp] Public Key Look Up
Precedence: list

On Wed 12/May/2021 20:44:34 +0200 Dave Crocker wrote:
> On 5/12/2021 9:57 AM, Alessandro Vesely wrote:
>>
>> Neither case provides for end-to-end crypto.  (Hm... possibly except DKIM for 
>> postmaster to postmaster communication, deploying the binary key as OpenGPG.  
>> Not an alluring technique.)
> 
> DKIM doesn't use encryption, but it does do signing, which is a crypto function.
> 
> More simply: the thing that is published in a DKIM record is a public key.

Right.  Anyway, if I encrypted something using your DKIM public key, you could 
easily decrypt it using the private key.  (There's a script by the Monkeysphere 
Project, pem2openpgp, which can transform a DKIM private key into an OpenPGP 
key for signing.  A silly exercise.)

Best
Ale
--

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