Secure key rate of the BB84 protocol using finite sample bits

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Abstract

We improve the non-asymptotic key rate shown by Scarani and Renner by proposing several methods to construct tighter conservative confidence interval of the phase error rate than the one shown by them. In addition, we show that the accurate channel estimation method non-asymptotically increases the key rate over the amplitude damping channel as well as the asymptotic case in the BB84 protocol. © 2010 IEEE.

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Sano, Y., Matsumoto, R., & Uyematsu, T. (2010). Secure key rate of the BB84 protocol using finite sample bits. In IEEE International Symposium on Information Theory - Proceedings (pp. 2677–2681). https://doi.org/10.1109/ISIT.2010.5513653

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