https://hal.inria.fr/hal-00926300Leverrier, AnthonyAnthonyLeverrierSECRET - Security, Cryptology and Transmissions - Inria Paris-Rocquencourt - Inria - Institut National de Recherche en Informatique et en AutomatiqueSecurity of continuous-variable quantum key distribution against general attacksHAL CCSD2013[PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph]Leverrier, Anthony2014-01-09 13:52:582022-01-21 03:13:492014-01-09 13:52:58enConference papers1We 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)).