Security bounds for continuous variables quantum key distribution

Miguel Navascues, Antonio Acin

Research output: Contribution to journalArticle (Academic Journal)peer-review

121 Citations (Scopus)


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 interacts individually with 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.
Original languageUndefined/Unknown
JournalPhysical Review Letters
Publication statusPublished - 19 Jul 2004

Bibliographical note

See also F. Grosshans, quant-ph/0407148


  • quant-ph

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