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Article

Title: Quantum Encryption Goes Long

Author: Greenemeier, Larry Article Type: Product Analysis
Source: Information Week, n1109 p22(1) Publication Date: Oct 9, 2006
  ISSN: 8750-6874
URL of Publication: http://www.informationweek.com

The chief stumbling block for quantum encryption has been the inability to send information over long distances. However, scientists at NIST (National Institute of Standards) announced recently that they generated and transmitted secret quantum keys over 115 miles of fiber-optic cable in an experiment conducted in 2005. The distance is the farthest that such information has traveled, According to Carl Williams of NIST, the technology would fend off all future kinds of attacks. Photonic sensors developed by NIST physicist Sae Woo Nam, were crucial to the success of the experiment. The distance that light can travel over fiber-optic cable is dependent on the quality of the glass fibers in the core of the cable, and NIST photon sensors were 45 percent more efficient than commercial products. Quantum encryption is not compatible with public key encryption systems and still must be transmittable over longer distances to be practical for most businesses.

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