Decoy state quantum key distribution in telecom dark fiber

Wei Chen; Zheng-fu Han; Zhen-qiang Yin; Qing-lin Wu; Guo Wei; Guang-can Guo

doi:10.1117/12.756067

26 November 2007 Decoy state quantum key distribution in telecom dark fiber

Wei Chen, Zheng-fu Han, Zhen-qiang Yin, Qing-lin Wu, Guo Wei, Guang-can Guo

Proceedings Volume 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography; 682709 (2007) https://doi.org/10.1117/12.756067
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

The imperfect components of a quantum key distribution (QKD) system will degrade its security. The highly attenuated weak coherent laser source used in today's QKD system is vulnerable to PNS attacks due to multi-photon optical pulses. Decoy State QKD, which is capable of beating PNS attacks and providing unconditional security, has been an attractive scheme recently. We have used a one way Faraday-Michelson phase modulated QKD system to implement 123km decoy state QKD in the lab. Furthermore a field decoy state QKD experiment of 32km dark fiber in Beijing is fulfilled. The optical pulse repetition rate is 1MHz and the final secure key is 9.59×10^-7 (6.784×10^-6) bit per pulse for 123km (32km). The experiment result indicates that the decoy state scheme can be successfully used in real-life metropolitan QKD sessions.

Citation Download Citation

Wei Chen, Zheng-fu Han, Zhen-qiang Yin, Qing-lin Wu, Guo Wei, and Guang-can Guo "Decoy state quantum key distribution in telecom dark fiber", Proc. SPIE 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography, 682709 (26 November 2007); https://doi.org/10.1117/12.756067

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