24 August 2004 Practical quantum cryptography
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We report our recent results in development of the secure fiber-optics communication system based upon quantum key distribution (QKD). Emphasize is made on the limitation imposed by the state-of-the-art components crucial for the system performance. We discuss the problem of the interferometer design and highlight the possible security loopholes known. Together with single photon counting performance it places the main restriction on the distance range and the secure key rate of the QKD system based upon the weak coherent pulses. Finally we describe the result of the first test of the system using single photons produced by non-degenerate parametric down-conversion as a source.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexei Trifonov, Alexei Trifonov, Anton Zavriyev, Anton Zavriyev, Darius Subacius, Darius Subacius, Romain Alleaume, Romain Alleaume, Jean-Francois Roch, Jean-Francois Roch, } "Practical quantum cryptography", Proc. SPIE 5436, Quantum Information and Computation II, (24 August 2004); doi: 10.1117/12.542646; https://doi.org/10.1117/12.542646


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