tracing the Web of Trust?

[Michael W. Lucas]

Hi folks,

I'm trying to learn if there's a tool to trace the web of trust
between two keys.

For example, suppose I get an email from someone I've never heard of
and want to learn if there is any valid chain of signatures leading
from me to him.

I imagine that this is a difficult problem.  :-)  Has anyone solved it
for Joe Average user?

Thanks,
==ml

-- 
Michael W. Lucas	mwlucas at FreeBSD.org, mwlucas at BlackHelicopters.org
		http://www.BlackHelicopters.org/~mwlucas/

"The cloak of anonymity protects me from the nuisance of caring." -Non Sequitur