Z L Yuan et al 2009 New J. Phys. 11 045019 doi:10.1088/1367-2630/11/4/045019
Practical gigahertz quantum key distribution based on avalanche photodiodes
Quantum Cryptography: Theory and PracticeZ L Yuan1,3, A R Dixon1,2, J F Dynes1, A W Sharpe1 and A J Shields1
Show affiliationsPart of Quantum Cryptography: Theory and Practice
We report in this paper a gigahertz clocked quantum key distribution (QKD) system using only practical components. Compact semiconductor avalanche photodiodes are used for high-speed single photon detection, whereas an attenuated laser is used as a light source in combination with the decoy protocol for guarding against photon-number-splitting attacks. The system is characterized by secure key rates of 1.02 Mbit s−1 for a fibre distance of 20 km and 10.1 kbit s−1 for 100 km. The suitability of standard single mode fibres as the quantum channel is also demonstrated.
- PACS
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03.67.Dd Quantum cryptography and communication security
- Subjects
- Dates
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Issue 4 (April 2009)
Received 17 December 2008
Published 30 April 2009
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Practical gigahertz quantum key distribution based on avalanche photodiodes
Z L Yuan et al 2009 New J. Phys. 11 045019
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