Influence of avalanche-photodiode dead time on the security of high-speed quantum-key distribution systems
Hai Peng Xu, Lijun Ma, Joshua C. Bienfang, Xiao Hong Tang · 2006
We study the correlation in the shifted key induced by the dead time of Geiger-mode avalanche photodiodes (APDs) in quantum cryptographic systems. A simultaneous hold-off of the APDs (SHA) technique eliminates these correlations.