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Re: [OCLUG-Tech] PGP Info in tagline

  • Subject: Re: [OCLUG-Tech] PGP Info in tagline
  • From: "Jean-Francois Messier" <jf [ at ] messier [ dot ] ca>
  • Date: Thu, 10 Oct 2013 05:06:42 -0700
Good thing to know !!! Thanks :-)

JF
---
Le code source libre c'est l'ouverture de l'esprit.
Open Source is open minded.


-------- Original Message --------
Subject: Re: [OCLUG-Tech] PGP Info in tagline
From: Richard Guy Briggs <rgb [ at ] tricolour [ dot ] net>
Date: Thu, October 10, 2013 7:40 am
To: Jean-Francois Messier <jf [ at ] messier [ dot ] ca>
Cc: Murphy Scott <scott [ dot ] murphy [ at ] arrow-eye [ dot ] com>, OCLUG
<linux [ at ] lists [ dot ] oclug [ dot ] on [ dot ] ca>

On Thu, Oct 10, 2013 at 04:35:28AM -0700, Jean-Francois Messier wrote:
> Thank You. I also understand that I should perhaps change the email
> address in my GPG key, so it matches my commonly used email address.

The only way to change an email address is to add a new one and delete
an old one. Any signatures of that old email address will be lost.

I would generally only add addresses, unless you are able to get the
new addresses signed by the same people who signed your previous id.

> JF
> 
> -------- Original Message --------
> Subject: Re: [OCLUG-Tech] PGP Info in tagline
> From: Murphy Scott <scott [ dot ] murphy [ at ] arrow-eye [ dot ] com>
> Date: Wed, October 09, 2013 10:36 pm
> To: Richard Guy Briggs <rgb [ at ] tricolour [ dot ] net>
> Cc: Jean-Francois Messier <jf [ at ] messier [ dot ] ca>, OCLUG
> <linux [ at ] lists [ dot ] oclug [ dot ] on [ dot ] ca>
> 
> This may be specific to GPG created keys. It is mentioned on the
> gpgtools.org website, as well as in several key signing party documents.
> 
> Wikipedia mentions the following:
> 
> In PGP, most keys are created in such a way so that what is called the
> "key ID" is equal to the lower 32 or 64 bits respectively of a key
> fingerprint. PGP uses key IDs to refer to public keys for a variety of
> purposes.
> 
> The Apache Foundation has a section on OpenPGP
> (http://www.apache.org/dev/openpgp.html#find-key-id-with-fingerprint):
> 
> >From The Fingerprint
> 
> If you have a fingerprint , then the key ID should be the last 8 digits.
> 
> For example, the ID of the key with fingerprint:
> 
> FF96 6261 C995 1DDE BF34 5150 D5D2 BDB5 E2B0 54B8
> 
> should be:
> 
> E2B054B8
> 
> This can be confirmed by:
> 
> $ gpg --list-keys --fingerprint E2B054B8
> 
> pub 4096R/E2B054B8 2009-08-20
> Key fingerprint = FF96 6261 C995 1DDE BF34 5150 D5D2 BDB5 E2B0 54B8
> uid Alice Example (EXAMPLE NEW KEY) <alice [ at ] example [ dot ] org>
> sub 4096R/4A6D5217 2009-08-20
> 
> I'm not sure what the definitive response would be. All keys that I have
> seen generated in the past 5 years seem to match.
> 
> Confused,
> Scott
> 
> 
> On 2013-10-09, at 5:50 PM, Richard Guy Briggs <rgb [ at ] tricolour [ dot ] net> wrote:
> 
> > On Wed, Oct 09, 2013 at 04:54:06PM -0400, Murphy Scott wrote:
> >> Technically, you only need the full fingerprint, as the keyid is the last 8 hex digits of the fingerprint
> > 
> > That doesn't work for my older key:
> > 
> > 2115A82D
> > 19 6A 8F C2 B5 D8 7A AA 28 E0 FE 26 6F F0 84 9E
> > 
> >> Scott
> >> 
> >> On 2013-10-09, at 3:34 PM, Richard Guy Briggs <rgb [ at ] tricolour [ dot ] net> wrote:
> >> 
> >>> On Wed, Oct 09, 2013 at 12:20:32PM -0700, Jean-Francois Messier wrote:
> >>>> Usually, what are the infos in the email tag line about a PGP/GPG key ?
> >>>> Is there a format ? I want to update my mail tag with just the right
> >>>> info. I currently see this from the command line:
> >>>> 
> >>>> ===
> >>>> pub 2048R/4EFF6649 2013-10-03
> >>>> Key fingerprint = 9A07 242C 1AEE 2A0D A0F4 B737 23C6 9C3F 4EFF
> >>>> 6649
> >>>> uid Jean-Francois Messier (New PGP key)
> >>>> <newpgp [ at ] messier [ dot ] ca>
> >>>> ===
> >>> 
> >>> I'd strip it down to these two:
> >>> 
> >>> PGP KEYID: 3382648E
> >>> PGP Fingerprint: D9DB 27DF 0066 1098 2085 7E5A 0557 2D63 3382 648E
> >>> 
> >>> The rest anyone can get from a key server and your uid is in your From:
> >>> line.
> >>> 
> >>>> Thanks :-)
> >>>> 
> >>>> JF
> >>> 
> >>> slainte mhath, RGB
> > 
> > slainte mhath, RGB

 slainte mhath, RGB

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