Secret Key Distribution Protocol for Practical Optical Channels Using a Preshared Key and Phase Fluctuations

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概要

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• A practical secret-key-distribution protocol using general phase fluctuations is described. A preshared key is assumed and is used only inside a transmitter and a receiver. The probabilistic property of signal-light fluctuations works with the preshared key to produce a difference in bit-error rate between a receiver and an eavesdropper. Using the difference, new secret keys are generated information theoretically although a preshared key is used. The probabilistic property of signal-light fluctuations is essential in this protocol, and classical fluctuations as well as quantum fluctuations are applicable. Because signal states are classical, the system becomes tolerant of loss and amplification.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2010-07-25

著者

• Tomaru Tatsuya

  Advanced Research Laboratory Hitachi Ltd.

• Tomaru Tatsuya

  Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan

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• Secret Key Distribution Protocol for Practical Optical Channels Using a Preshared Key and Phase Fluctuations

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