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Chinese quantum satellite sends 'unbreakable' code
China has sent an unbreakable code from a satellite to the Earth, marking the first time space-to-ground quantum key distribution technology has been realised, state media said on Thursday. China launched the world's first quantum satellite last August, to help establish hack proof communications, a development the Pentagon has called a notable advance. Any attempt to eavesdrop on the quantum channel would introduce detectable disturbances to the system, Pan said.
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