Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.030502
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Funding
- Swiss National Science Foundation (SNF) through the National Centre of Competence in Research Quantum Science and Technology [200020-135048]
- European Research Council [258932]
- Humboldt foundation
- F.R.S.-FNRS under project HIPERCOM
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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)]. DOI: 10.1103/PhysRevLett.110.030502
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