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Proceedings Paper

Security of two-way quantum cryptography against asymmetric attacks
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Paper Abstract

Recently, we have shown the advantages of two-way quantum communications in continuous variable quantum cryptography. Thanks to this new approach, two honest users can achieve a non-trivial security enhancement as long as the Gaussian interactions of an eavesdropper are independent and identical. In this work, we consider asymmetric strategies where the Gaussian interactions can be different and classically correlated. For several attacks of this kind, we prove that the enhancement of security still holds when the two-way protocols are used in direct reconciliation.

Paper Details

Date Published: 5 September 2008
PDF: 9 pages
Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 709215 (5 September 2008); doi: 10.1117/12.793805
Show Author Affiliations
Stefano Pirandola, MIT (United States)
Stefano Mancini, Univ. di Camerino (Italy)
Seth Lloyd, MIT (United States)
Samuel L. Braunstein, Univ. of York (United Kingdom)

Published in SPIE Proceedings Vol. 7092:
Quantum Communications and Quantum Imaging VI
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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