Intercept-resend attack on six-state quantum key distribution over collective-rotation noise channels

Garapo Kevin^{1, †,}, Mafu Mhlambululi², Petruccione Francesco^{1, 3}

Comparison of the variation of the quantum bit error rate Q with the rotation angle θ for the case where there is no eavesdropping (Q₀), the case where the eavesdropper performs the attack outlined in strategy (I) (Q₁) and the case where the eavesdropper performs the attack outlined in strategy (II) (Q₂).