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Lower and Upper Bounds on the Secret-Key Rate for Quantum Key Distribution Protocols Using One-Way Classical Communication

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Renner, R.
Published in Physical Review Letters. 2005, vol. 95, no. 8
Abstract We investigate a general class of quantum key distribution (QKD) protocols using one-way classical communication. We show that full security can be proven by considering only collective attacks. We derive computable lower and upper bounds on the secret-key rate of those QKD protocols involving only entropies of two-qubit density operators. As an illustration of our results, we determine new bounds for the Bennett-Brassard 1984, the 6-state, and the Bennett 1992 protocols. We show that in all these cases the first classical processing that the legitimate partners should apply consists in adding noise.
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KRAUS, Barbara, GISIN, Nicolas, RENNER, R. Lower and Upper Bounds on the Secret-Key Rate for Quantum Key Distribution Protocols Using One-Way Classical Communication. In: Physical Review Letters, 2005, vol. 95, n° 8. https://archive-ouverte.unige.ch/unige:36762

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Deposited on : 2014-05-20

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