Noise Tolerance of the BB84 Protocol with Random Privacy Amplification

Details Noise Tolerance of the BB84 Protocol with Random Privacy Amplification Noise Tolerance of the BB84 Protocol with Random Privacy Amplification

2004-12-09

arxiv.org/abs/quant-ph/0412070v4

International Journal of Quantum Information, vol. 4, no. 6, pp. 935-946, Dec. 2006

Physics

Quantum Physics

26 pages, 1 figure, version 2 fills a logical gap in the proof. Version 3 includes an upper bound on the mutual information wi

Scientific paper

10.1142/S0219749906002316

We prove that BB84 protocol with random privacy amplification is secure with
a higher key rate than Mayers' estimate with the same error rate. Consequently,
the tolerable error rate of this protocol is increased from 7.5 % to 11 %. We
also extend this method to the case of estimating error rates separately in
each basis, which enables us to securely share a longer key.

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