Attacking a high-dimensional quantum key distribution system with wavelength-dependent beam splitter

Du Ge-Hai^{1, 2}, Li Hong-Wei^{1, 2, †}, Wang Yang^{1, 2}, Bao Wan-Su^{1, 2, ‡}

Attacking time-bin HD-QKD system. The red area is controlled by the eavesdropper Eve.