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Universally-composable finite-key analysis for efficient four-intensity decoy-state quantum key distribution

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Abstract

We propose an efficient four-intensity decoy-state BB84 protocol and derive concise security bounds for this protocol with the universally composable finite-key analysis method. Comparing with the efficient three-intensity protocol, we find that our efficient four-intensity protocol can increase the secret key rate by at least 30%. Particularly, this increasing rate of secret key rate will be raised as the transmission distance increases. At a large transmission distance, our efficient four-intensity protocol can improve the performance of quantum key distribution profoundly.

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Authors and Affiliations

  1. State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou, Henan, P.R. China

    Haodong Jiang, Ming Gao, Bao Yan, Weilong Wang & Zhi Ma

Authors
  1. Haodong Jiang
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  2. Ming Gao
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  3. Bao Yan
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  4. Weilong Wang
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  5. Zhi Ma
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Correspondence to Ming Gao.

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Jiang, H., Gao, M., Yan, B. et al. Universally-composable finite-key analysis for efficient four-intensity decoy-state quantum key distribution. Eur. Phys. J. D 70, 78 (2016). https://doi.org/10.1140/epjd/e2016-60655-2

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