NIST researchers including Xaio Tang (photo) have generated raw code for "unbreakable" encryption at a rate >4 million bps over 1 km of optical fiber. The work is described as a step toward using conventional high-speed networks such as broadband Internet and LANs to transmit ultrasecure video for surveillance and other sensitive applications. The quantum key distribution system uses single photons in different orientations to produce a continuous binary code. The rules of quantum mechanics ensure the detection of anyone intercepting the key, thus providing a highly secure key exchange. http:// tinyurl.com/l3zuq
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