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 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.
|Publication status||Published - 2008|
|Event||Conference on Quantum Communications and Quantum Imaging VI - San Diego, California, United States|
Duration: 12 Aug 2008 → 14 Aug 2008
|Conference||Conference on Quantum Communications and Quantum Imaging VI|
|City||San Diego, California|
|Period||12/08/08 → 14/08/08|