http://www.dailymail.co.uk/sciencetech/article-3720772/China-launch-unbreakable-quantum-spy-satellite-say-one-day-lead-megascope-size-Earth-spot-license-plate-Jupiter-s-moons.html

[quote]
China to launch unbreakable quantum spy satellite - and it could one day lead to a megascope the size of Earth that could 'spot a license plate on Jupiter's moons'Satellite produces entangled photon pairs which form an encryption keyThese photons will theoretically remain linked over great distancesThis means that any attempts to listen in will be detected on the other sideScientists say this could one day make for a secure global network 

Scientists in China are set to launch the world’s first ‘quantum satellite,’ which could one day make for an ultra-secure global communications network.
The 1,300 pound craft contains a crystal that produces pairs of entangled photons, which will be fired to ground stations in China and Austria to form a ‘secret key.’
Entangled photons theoretically maintain their link across any distance, and according to the scientists, any attempts to breach this type of communication would be easily detectable.
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                   Jim Bell


(I have big questions about some of these statements in this article.  But given the subject matter, quantum entanglement, confusion by lay individuals is to be expected.)