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McKay Professor of Applied Physics and Professor of Physics Tai T. Wu, the head of the Harvard lab experimenting with the quantum code key system, was on vacation and could not be reached for comment...
...quantum network involves the signaling of weak light impulses between two locations. Any message would be accompanied by a scrambled key that would be encoded by the sender and decoded by the recipient. The message could only be accessed if the code were successfully unscrambled...
Once the weak light impulses reached their destination, the sender and receiver would compare elements of their decoded keys to make sure they were identical, Myers said. He said a tenet of quantum physics would make this comparison the essential factor that would make the quantum code key a successful encoding system...
...said two parties using a quantum key code would be sure that their key was not intercepted en route if the keys were identical. Conversely, the parties would know not to activate their keys—which in turn would open the message protected by the key—if there were discrepancies between the sender and recipient...
Myers added that the Heisenberg Uncertainty Principle guaranteed that a hacker could not steal the same code that would ultimately be received...