title: Security of continuous-variable quantum key distribution against general attacks.
abstract: We prove the security of Gaussian continuous-variable quantum key distribution with coherent states against arbitrary attacks in the finite-size regime. In contrast to previously known proofs of principle (based on the de Finetti theorem), our result is applicable in the practically relevant finite-size regime. This is achieved using a novel proof approach, which exploits phase-space symmetries of the protocols as well as the postselection technique introduced by Christandl, Koenig, and Renner [Phys. Rev. Lett. 102, 020504 (2009)].
authors: Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland.
authors: Anthony
authors: A
authors: Leverrier
authors: Raúl
authors: R
authors: García-Patrón
authors: Renato
authors: R
authors: Renner
authors: Nicolas J
authors: NJ
authors: Cerf