Unconditional Security Proof of Long-Distance Continuous-Variable Quantum Key Distribution with Discrete Modulation
Anthony Leverrier, Philippe Grangier · Physical Review Letters · 2009
We present a continuous-variable quantum key distribution protocol combining a discrete modulation and reverse reconciliation. This protocol is proven unconditionally secure and allows the distribution of secret keys over long distances, thanks to a reverse reconciliation scheme efficient at very low signal-to-noise ratio.