Security of two-way quantum cryptography against asymmetric attacks - art. no. 709215

Research output: Contribution to conferencePaper

Published copy (DOI)




ConferenceConference on Quantum Communications and Quantum Imaging VI
CountryUnited States
CitySan Diego, California
Conference date(s)12/08/0814/08/08

Publication details

DatePublished - 2008
Original languageUndefined/Unknown


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.

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