Security of Continuous-Variable Quantum Key Distribution Against General Attacks

Anthony Leverrier, Raul Garcia-Patron Sanchez, Renato Renner, Nicolas J. Cerf

Research output: Contribution to journalArticlepeer-review


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)].
Original languageEnglish
Article number030502
Number of pages5
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 18 Jan 2013


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