[cfgeeks] And then there's Li-Fi...

[Kevin P. Inscoe]

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http://www.aip.org/pnu/2007/split/815-2.html

"The transmitted photons' polarization states (representing 0s and 1s)
formed the basis of a "quantum key," a stream of information that could
be used to decipher a longer encrypted message. The researchers used
single photons because they are more secure than groups of photons, from
which an eavesdropper could pluck information about the key.

To detect potential eavesdroppers even better, the researchers entangled
the outgoing particles of light with photons kept at the transmitting
station. They used astronomy stations because their telescopes are
sensitive enough to detect individual photons. The data transmission
rate was low, only 178 photons in 75 seconds, but the photons are able
to travel longer distances in free space (potentially thousands of
kilometers or more) than they are in fiber optic cables (100 km) before
they become undetectable."

http://www.signandsight.com/features/614.html

http://en.wikipedia.org/wiki/Anton_Zeilinger

- --
Kevin P. Inscoe                       Amateur Radio Call Sign: KE3VIN
Deltona, FL 32738                                28.9497N by 81.1952W
kevin [at] inscoe [dot] org                    http://kevininscoe.com
GPG 0x61288D53













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