Figure 4From: Automated verification of countermeasure against detector-control attack in quantum key distributionMonitor readout M under detector illumination by 0.8-photon pulses. The leftmost point is for unilluminated detector with dark counts only, while the other points are under illumination at a laser pulse rate from 10 kHz to 1 MHz. An estimated “normal” detector click rate of 20 kHz or less results in single sampled values of \(M < 8100\)Back to article page