Randomly varying SPAD gate voltage under pulsed detector blinding creates a large trigger-pulse energy gap that reveals eavesdropper fingerprints and enables estimation of compromised key bits.
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Countermeasure against detector-blinding attack with estimation of secret-key leakage
Randomly varying SPAD gate voltage under pulsed detector blinding creates a large trigger-pulse energy gap that reveals eavesdropper fingerprints and enables estimation of compromised key bits.