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Proceedings Paper

Quantum stream cipher Part III: Design of keyed randomization and experiment
Author(s): Osamu Hirota; Tsuyoshi S. Usuda; Masaru Fuse
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Paper Abstract

In this talk, we present a design of keyed randomization, and an experiment for quantum stream cipher by Yuen protocol which can realize a randomized stream cipher with Gbps for long distance. A simple explanation of why Y-00 is more secure than any type of the conventional stream cipher is given, showing Y-00 with keyed randomization, for example, overlapping selection keying:OSK. That is, the noiseless Y-00 with OSK is equivalent of the conventional stream cipher, but the noise is inevitable. So one can easily see that the security is enhanced by the noise. In addition, we give a design for the implementation of the intensity modulation scheme and report the experimental demonstration of 1 Gbps quantum stream cipher with OSK randomization through 20~40 km long transmission line. This may provide a way to go toward the broad market applications which require security, high speed, compact size, maintenance free, and low price.

Paper Details

Date Published: 25 August 2005
PDF: 12 pages
Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 589304 (25 August 2005); doi: 10.1117/12.613080
Show Author Affiliations
Osamu Hirota, Tamagawa Univ. (Japan)
Chuo Univ. (Japan)
Tsuyoshi S. Usuda, Aichi Prefectural Univ. (Japan)
Masaru Fuse, Panasonic (Matsusita Electric Co. Ltd.) (Japan)

Published in SPIE Proceedings Vol. 5893:
Quantum Communications and Quantum Imaging III
Ronald E. Meyers; Yanhua Shih, Editor(s)

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