Quantum video chat links scientists on two different continents

Demo of ultrasecure internet connection is a step toward global quantum communications

telescope in Graz, Austria

SECRET CODE A telescope in Graz, Austria, received particles of light beamed down to Earth from the Chinese satellite Micius. Those photons encode a quantum encryption key used in a secure quantum videoconference. A laser on the telescope tracks the satellite’s location in the sky.

© Johannes Handsteiner/ÖAW

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