[ubuntu-uk] Code of conduct/GPG

[Steve Smith]

I'm trying to get to the bottom of what GPG is and how it works.  I
can't find a description that covers the absolute basics of what it
is, would anyone care to explain to me?  Does it have anything to do
at all with the actual computer you create it on, or is it just
completely random?  How does it actually provide proof of
identification, etc in practise?

Thanks :)
Steve