[kdepim-users] Can't set encryption key for contact

Mon May 17 22:16:27 BST 2010

On Monday 17 May 2010 22:35:21 Ingo Klöcker wrote:
> Just to give a bit more details... (see below)
> 
> On Monday 17 May 2010, Anne Wilson wrote:
> > On Monday 17 May 2010 00:07:52 Pascal Bernhard wrote:
> > > Hey all,
> > >
> > > I'm encountering the following problem with Kmail:
> > > When trying to set the encryption preferences for my contacts in
> > > the address book (of Kmail), I can see the available public keys,
> > > but when I try to pick one, the button OK is not activated. The
> > > keys have the trust level set to "Fully" via Kgpg, though I have
> > > not signed them, as I do not know the people that well.
> 
> It is a common misunderstanding to think that the trust level refers to
> your trust in the key, but that's not what the trust level refers to.
> The trust level (also called the "owner trust") assigned to a key tells
> gpg how much you trust the owner of the key with respect to signing
> other keys. Consequently, the trust level does not have any influence on
> the validity of the corresponding key. Instead it does influence the
> validity of other keys signed with this key (or rather signed by the
> owner of this key, hence "owner trust"). I hope this explanation was
> somewhat understandable.
> 
> Given that you do not know the key owners very well you might want to
> lower your trust in them. Otherwise, all keys signed by them will
> automatically be valid for you now that you have locally signed the
> keys.
> 
> > > The
> > > encryption settings work well with an older contact, I already
> > > sent encyrpted mails to, when still using Ubuntu 9.04 on my old
> > > computer. I have switched to Debian Squeeze which comes with Kmail
> > > 1.12.4 and KDE 4.3.4. Gnupg2 is version 2.0.14-1, Gnupg 1.4.10-2
> > > is also installed, but I cannot remove it, since this would
> > > deinstall Akregator & Kontact too.
> > > Any advice would be appreciated.
> >
> > The fact that you are willing to exchange encrypted mail with a
> > person denotes a certain level of trust, and gpg has a facility for
> > this.  If you use
> >
> > gpg --lsign-key xxxxxxxxx (the key's 8-character shortform)
> >
> > it 'local-signs' the key.  A local-signed key of course should not be
> > uploaded to a keyserver, as you are not in a position to guarantee
> > to someone else that there has been adequate checking.  It should,
> > though, satisfy the needs for signing and encrypting mail in KMail.
> 
> FWIW, uploading a local signature (which is also known as non-exportable
> signature) is not easily possible (if it is possible at all). Therefore,
> one does not need to worry that one could upload a local signature
> accidentally.
> 
> 
> Regards,
> Ingo
> 
Hi Ingo, 

thank you for the explanation about trust levels. In fact, I wasn't aware 
about the implications of the trust level on other keys, having signed, the 
key I trust know. (Did I get that right? In short, with trusting the key I 
declare that I believe the trust others have set into the key owner in 
question is correct. Did I understand that right?). I guess, I will lower the 
trust level, though I have no reason to have any reservations towards the 
keys' owners. It's just that I do not know them personally, and did not want 
to sign something too rashly.

Thanks a lot for all your help and clarifications, 

Pascal
-- 

Pascal Bernhard
Schwalbacher Straße 7
12161 Berlin
Germany

Phone +49 30 60 92 37 72
Cell +49 177 4 19 26 34

www.secunergy.com

Je me regarde pour me désoler,
je me compare pour me consoler. 

My Public PGP-Key:

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