SecurityBounds for Continuous Variables Quantum Key Distribution

Miguel Navascués and Antonio Acín
Phys. Rev. Lett. 94, 020505 – Published 21 January 2005

Abstract

Security bounds for key distribution protocols using coherent and squeezed states and homodyne measurements are presented. These bounds refer to (i) general attacks and (ii) collective attacks where Eve applies the optimal individual interaction to the sent states, but delays her measurement until the end of the reconciliation process. For the case of a lossy line and coherent states, it is first proven that a secure key distribution is possible up to 1.9 dB of losses. For the second scenario, the security bounds are the same as for the completely incoherent attack.

  • Figure
  • Figure
  • Figure
  • Received 27 July 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.020505

©2005 American Physical Society

Authors & Affiliations

Miguel Navascués and Antonio Acín

  • ICFO-Institutde Ciències Fotòniques, Jordi Girona 29, Edifici Nexus II, E-08034Barcelona, Spain

See Also

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 94, Iss. 2 — 21 January 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×