Quantum encryption sets long-distance record
US researchers at the Los Alamos National Laboratory (LANL) in New Mexico and the National Institute of Standards and Technology (NIST) in Boulder, Colorado, have shown that quantum key cryptography based on photon transmission can offer secure communications at distances of up to 184.6 km. The previous record of 122 km was set by researchers at Toshiba's Cambridge Research Laboratory in April last year.
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