One feature of quantum communications is ultra-high security, since a quantum photon can’t be separated or duplicated. It makes it impossible to wiretap, intercept or crack the information transmitted through them. The Quantum Experiments at Space Scale, or QUESS satellite, is equipped with a photon generator, a quantum encryption device, and a projector. QUESS will shoot photons from 500 kilometers above the Earth to the receiver at a land station, which requires very high accuracy.
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