Unbreakable encryption

Unbreakable encryption comes to the U.S. - Fortune Tech: " . . . . QKD stood out to Battelle's researchers as the best technically feasible means of generating secure encryption that wasn't just a solution that works now and that won't leave data exposed in the future. But QKD also has some drawbacks, including a limited range and potential difficulties in sharing keys. So Battelle turned to ID Quantique, a Geneva-based quantum technology company with extensive experience in quantum communications, to help smooth out those issues. QKD works by tapping some of quantum physics' stranger phenomena to make it virtually impossible for a third party to steal an encryption key without sender and receiver being aware. Using a standard encryption algorithm, the sender encrypts the data and transmits it to the receiver. But instead of sending along the key by conventional means, it is encoded into a single photon -- the elementary particle of light -- which is then placed into a correlated state with a second photon. Physicists call this "entanglement" (Einstein called it "spooky") and under the laws that govern the quantum world any attempt to observe or measure one photon affects the other correlated photon regardless of whether they are in the same room or on opposite sides of the planet. . . ." (read more at link above)

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