Security of EPR-based quantum cryptography against incoherent symmetric attacks
Hitoshi Inamori, Luke Rallan, Vlatko Vedral · Journal of Physics A Mathematical and General · 2001
We investigate a new strategy for incoherent eavesdropping in Ekert's entanglement-based quantum key distribution protocol. We show that under certain assumptions of symmetry the effectiveness of this strategy reduces to that of the original single-qubit protocol of Bennett and Brassard.