28 Apr '14, 7pm

Quantum Cryptography Done Over Shared Data Line

Researchers have sent quantum keys over a "lit" fiber-optic network, a step towards using quantum cryptography on the networks businesses and institutions use every day. A group of U.K.-based research groups last week said the demonstration opens the door to more research that will make the technology more commercially viable. The researchers were from Toshiba Research Europe, BT, ADVA Optical Networking, and the U.K.'s National Physical Laboratory (NPL). In quantum cryptography, the keys to unlock the contents of communications are represented with photons. It starts with a laser that sends a pair of photons over a fiber-optic network. The polarization of photons—whether they’re oscillating horizontally or vertically, for example—can be detected by a receiver and read as bits, which are used to generate the same encryption key at both ends of the network connection. If an...

Full article: http://spectrum.ieee.org/tech-talk/computing/networks/qua...

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Researchers have sent quantum keys over a "lit" fiber-optic network, a step towards using quantum cryptography on the netw...

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