Scientists Find Cheaper Way to Ensure Internet Security

Scientists at Toshiba and Cambridge University have perfected a technique that offers a less expensive way to ensure the security of the high-speed fiber optic cables that are the backbone of the modern Internet.The research, which will be published Tuesday in the science journal Physical Review X, describes a technique for making infinitesimally short time measurements needed to capture pulses of quantum light hidden in streams of billions of photons transmitted each second in data networks. Scientists used an advanced photodetector to extract weak photons from the torrents of light pulses carried by fiber optic cables, making it possible to safely distribute secret keys necessary to scramble data over distances up to 56 miles.
www.nytimes.com/2012/11/20/technology/fiber-optic-breakthrough-to-improve-internet-security-cheaply.html

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