As long as all of Warren's machines can be relied
upon to not try to subvert the system, it almost
doesn't matter how he comes up with his Globally
Unique ID (the MAC addr approach does seem the most
straightforward). On the other hand, if he does have
to worry about attempts to do MAC spoofing and such
on his internal net, it sounds like GUIDs are the
least of his problems.
So, educate me - how would you go about using
something algorithmic like MD5 or an asymmetrical
key-pair to solve this problem? Is it a requirement
that a GUID be the same from boot to boot? If a
system reboots with a different GUID do things break?
If GUID generation is algorithmic how do you know
it's unique? Would use of an asymmetrical key-pair
(please assume I don't know what I'm talking about)
imply that each machine would have a different GUID
for every other machine it communicated with?
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