Others have answered the other points, so I'll just answer this:

On Mon, Apr 01, 2002 at 11:00:39AM -0700, [EMAIL PROTECTED] wrote:
> so you are saying it is a totally subjective judgement call?

Yes.  It's a question of trust, which is very difficult to compute
algorithmically...

The question is:
(for local signing) Are you convinced that the keyholder is actually
the person they say they are?

(for export signing) all the above, plus: Are you willing to stake your
reputation on guaranteeing that the keyholder is the person they say they
are?

Personally, I have not signed *any* keys on my keyring /yet/ (except my
own).  IMHO, identity validation should only happen in person, or if you
know the person well enough to recognise their voice, you could do it
over the phone.  For example, I could validate friends from Uni over the
phone, but people from my local LUG (where email is the only main
channel of communication) would only be validated face-to-face (maybe
with exchange of other forms of ID).

Of course, you only have to exchange key fingerprints over the validating
channel, not entire keys.

-- 
David Smith        | Tel: +44 (0)1454 462380    Home: +44 (0)1454 616963
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