Abstract
We extend the security analysis of continuous variable quantum-key- distribution protocols using a family of post selection schemes to account for arbitrary eavesdropping attacks. We show that the postselection protocol is equivalent to a virtual entanglement-based protocol including a distillation stage. We introduce a particular 'Gaussian' post selection and demonstrate that the security can be calculated using only experimentally accessible quantities. Finally, we explicitly evaluate the performance for the case of a noisy Gaussian channel in the limit of unbounded key length and find improvements over all pre-existing continuous variable protocols in realistic regimes.
Original language | English |
---|---|
Article number | 020303 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 87 |
Issue number | 2 |
DOIs | |
Publication status | Published - 21 Feb 2013 |