Security of quantum key distribution using two-mode squeezed states against optimal beam splitter attack
Guangqiang He, Zhu Si-Wei, Guo Hong-Bin, Zeng Gui-Hua · Chinese Physics B · 2008
For the beam splitter attack strategy against quantum key distribution using two-mode squeezed states, the analytical expression of the optimal beam splitter parameter is provided in this paper by applying the Shannon information theory. The theoretical secret information rate after error correction and privacy amplification is given in terms of the squeezed parameter and channel parameters. The results show that the two-mode squeezed state quantum key distribution is secure against an optimal beam splitter attack.