Demonstration of secure quantum key distribution

Fabio Antonio Bovino; Pietro Varisco; Anna Martinoli; Paolo De Nicolo; Sandra Bruzzo; Anna Maria Colla; Giuseppe Castagnoli; Giovanni Di Giuseppe; Alexander V. Sergienko

doi:10.1117/12.487942

4 August 2003 Demonstration of secure quantum key distribution

Fabio Antonio Bovino, Pietro Varisco, Anna Martinoli, Paolo De Nicolo, Sandra Bruzzo, Anna Maria Colla, Giuseppe Castagnoli, Giovanni Di Giuseppe, Alexander V. Sergienko

Author Affiliations +

Proceedings Volume 5105, Quantum Information and Computation; (2003) https://doi.org/10.1117/12.487942
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

We present results of experimental demonstration of secure Quantum Key Distribution (QKD) at Elsag spa based on the implementation of BB84 protocol using polarization entangled states produced in the nonlinear process of type-II spontaneous parametric down conversion (SPDC). This enables us to avoid the use of active polarization modulation components and increases the overall key distribution rate. The high quality of polarization-entangled state generated by parametric down conversion and the high efficiency of coupling entangled-photon pairs into a single-mode optical fiber has enabled us to perform QKD with quantum bit-error rate compatible with acceptable security levels. The complete software system architecture includes a QKD protocol implementing all phases of the key distillation process. The system runs in a server and two users configuration on three different PCs connected over a local area network (LAN). Friendly graphical user interfaces (GUI) are available to start and to monitor the whole key generation and distillation process.

Citation Download Citation

Fabio Antonio Bovino, Pietro Varisco, Anna Martinoli, Paolo De Nicolo, Sandra Bruzzo, Anna Maria Colla, Giuseppe Castagnoli, Giovanni Di Giuseppe, and Alexander V. Sergienko "Demonstration of secure quantum key distribution", Proc. SPIE 5105, Quantum Information and Computation, (4 August 2003); https://doi.org/10.1117/12.487942

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