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Proceedings Paper

Experiments of 10 Gbit/sec quantum stream cipher applicable to optical Ethernet and optical satellite link
Author(s): Osamu Hirota; Kenichi Ohhata; Makoto Honda; Shigeto Akutsu; Yoshifumi Doi; Katsuyoshi Harasawa; Kiichi Yamashita
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Paper Abstract

The security issue for the next generation optical network which realizes Cloud Computing System Service with data center" is urgent problem. In such a network, the encryption by physical layer which provide super security and small delay should be employed. It must provide, however, very high speed encryption because the basic link is operated at 2.5 Gbit/sec or 10 Gbit/sec. The quantum stream cipher by Yuen-2000 protocol (Y-00) is a completely new type random cipher so called Gauss-Yuen random cipher, which can break the Shannon limit for the symmetric key cipher. We develop such a cipher which has good balance of the security, speed and cost performance. In SPIE conference on quantum communication and quantum imaging V, we reported a demonstration of 2.5 Gbit/sec system for the commercial link and proposed how to improve it to 10 Gbit/sec. This paper reports a demonstration of the Y-00 cipher system which works at 10 Gbit/sec. A transmission test in a laboratory is tried to get the basic data on what parameters are important to operate in the real commercial networks. In addition, we give some theoretical results on the security. It is clarified that the necessary condition to break the Shannon limit requires indeed the quantum phenomenon, and that the full information theoretically secure system is available in the satellite link application.

Paper Details

Date Published: 26 August 2009
PDF: 12 pages
Proc. SPIE 7465, Quantum Communications and Quantum Imaging VII, 746509 (26 August 2009); doi: 10.1117/12.825589
Show Author Affiliations
Osamu Hirota, Tamagawa Univ. (Japan)
Kenichi Ohhata, Kagoshima Univ. (Japan)
Makoto Honda, Tamagawa Univ. (Japan)
Hitachi Information and Communication Engineering Ltd. (Japan)
Shigeto Akutsu, Tamagawa Univ. (Japan)
Hitachi Information and Communication Engineering Ltd. (Japan)
Yoshifumi Doi, Tamagawa Univ. (Japan)
Hitachi Information and Communication Engineering Ltd. (Japan)
Katsuyoshi Harasawa, Tamagawa Univ. (Japan)
Hitachi Information and Communication Engineering Ltd. (Japan)
Kiichi Yamashita, Kagoshima Univ. (Japan)


Published in SPIE Proceedings Vol. 7465:
Quantum Communications and Quantum Imaging VII
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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