Security of two-way quantum cryptography against asymmetric attacks

Stefano Pirandola; Stefano Mancini; Seth Lloyd; Samuel L. Braunstein

doi:10.1117/12.793805

5 September 2008 Security of two-way quantum cryptography against asymmetric attacks

Stefano Pirandola, Stefano Mancini, Seth Lloyd, Samuel L. Braunstein

Proceedings Volume 7092, Quantum Communications and Quantum Imaging VI; 709215 (2008) https://doi.org/10.1117/12.793805
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Stefano Pirandola, Stefano Mancini, Seth Lloyd, and Samuel L. Braunstein "Security of two-way quantum cryptography against asymmetric attacks", Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 709215 (5 September 2008); https://doi.org/10.1117/12.793805

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