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Proceedings Paper

A unified analysis of optical signal modulation formats for quantum enigma cipher
Author(s): Kentaro Kato
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Paper Abstract

A unified treatment of typical optical modulation formats is given toward a future development of the quantum enigma cipher. In our analysis, the intensity shift keying (ISK), amplitude shift keying (ASK), phase shift keying (PSK), and quadrature amplitude modulation (QAM) coherent state signals are compared in terms of the masking number of potential signals through the numerical calculations of the square-root measurement. Through this comparison, we see that the use of ISK coherent state signal is the best choice for cryptographic purpose among these formats in achieving an appropriate balance between the number of signal photons and the number of quantum state signals.

Paper Details

Date Published: 30 August 2017
PDF: 12 pages
Proc. SPIE 10409, Quantum Communications and Quantum Imaging XV, 104090K (30 August 2017); doi: 10.1117/12.2272534
Show Author Affiliations
Kentaro Kato, Tamagawa Univ. (Japan)

Published in SPIE Proceedings Vol. 10409:
Quantum Communications and Quantum Imaging XV
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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