Abstract
We analyze the asymptotic security of the family of Gaussian modulated quantum key distribution protocols for continuous-variables systems. We prove that the Gaussian unitary attack is optimal for all the considered bounds on the key rate when the first and second momenta of the canonical variables involved are known by the honest parties.
- Received 4 August 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.190502
©2006 American Physical Society