uniquely identifying a machine...

[Chris Spencer]

This might not be a direct Python question, but I thought I'd pose it anyways.

I have a need, for licensing purposes, to be able to uniquely identify a
machine.  For various policy reasons, we can not rely on the TCP/IP stack being
active.  So uniquely identifying a machine by IP address, machine name, or NIC
address is not possible.

Cross-platform is a plus, but definately not necessary.

Anyone out there have any ideas?

Chris.