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Two-way quantum cryptography with continuous variables: unconditional security and performances at different wavelengths

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Abstract

In first place we analysed the security of two-way QKD against coherent attacks achieving unconditional security in all encoding/decoding configurations. In second place we studied the security, at different wavelengths, of two-way thermal QKD finding a robust threshold in reverse reconciliation, improving the security distances for continuous variable quantum cryptography in the infrared.

© 2014 Optical Society of America

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