Implementation of Two Way Free Space Quantum Key Distribution

Details Implementation of Two Way Free Space Quantum Key Distribution Implementation of Two Way Free Space Quantum Key Distribution

2011-08-17

arxiv.org/abs/1108.3411v1

Physics

Quantum Physics

To appear in the April 2012 issue of Optical Engineering (Vol. 51, No. 04)

Scientific paper

We report an implementation over free space medium of a two way four states quantum key distribution (QKD) protocol namely the LM05. The fully automated setup demonstrated a secure key generation rate of 3.54 kbits per second and quantum bit error rate (QBER) of 3.34% at mean photon number ({\mu}) = 0.15. The maximum tolerable channel loss for secure key generation considering Photon Number Splitting (PNS) attack, was 5.68 [dB]. The result successfully demonstrated the feasibility of a two way QKD protocol implementation over free space medium.

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