1999/10/31 by Norbert Lütkenhaus · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.61.052304
published as Physical Review A, Vol. 61, 052304 (2000) · 10 pages, 4 figures
arxiv created 2000/02/02 · arxiv updated 2009/12/01
I prove the security of quantum key distribution against individual attacks for realistic signals sources, including weak coherent pulses and downconversion sources. The proof applies to the BB84 protocol with the standard detection scheme (no strong reference pulse). I obtain a formula for the secure bit rate per time slot of an experimental setup which can be used to optimize the performance of existing schemes for the considered scenario.