Security of Post-selection based Continuous Variable Quantum Key Distribution against Arbitrary Attacks

Details Security of Post-selection based Continuous Variable Quantum Key Distribution against Arbitrary Attacks Security of Post-selection based Continuous Variable Quantum Key Distribution against Arbitrary Attacks

2011-06-04

arxiv.org/abs/1106.0825v1

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

We extend the security proof for continuous variable quantum key distribution protocols using post selection to account for arbitrary eavesdropping attacks by employing the concept of an equiv- alent protocol where the post-selection is implemented as a projective quantum measurement. We demonstrate that the security can be calculated using only experimentally accessible quantities and finally explicitly evaluate the performance for the case of a noisy Gaussian channel in the limit of unbounded key length.

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