While it is true that the quantum encryption is used mainly to detect if an outside source is attempting to observe the sent message; the thing that makes it unbreakable is that it would be possible to send a "one time pad" over the encryped network knowing that it has not been intercepted...
Wow, this is a great benchmark. I got "74% of the systems scanned by the Game Advisor rank higher in performance than your system."
Athlon 64 3000+ oc to 2.84 GHz, 1 gig of ram, and a 7800 GTX.
I'm impressed.