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Scientific article
English

Quantum key distribution using multilevel encoding: security analysis

Contributors

Bourennane, Mohamed; Karlsson, Anders; Björk, Gunnar; Gisin, Nicolas; Cerf, Nicolas J.

Published in

Journal of physics. A, mathematical and general, vol. 35, no. 47, p. 10065-10076

Publication date

2002

Abstract

We propose an extension of quantum key distribution based on encoding the key into quNits, i.e. quantum states in an N-dimensional Hilbert space. We estimate both the mutual information between the legitimate parties and the eavesdropper, and the error rate, as a function of the dimension of the Hilbert space. We derive the information gained by an eavesdropper using optimal incoherent attacks and an upper bound on the legitimate party error rate that ensures unconditional security when the eavesdropper uses finite coherent eavesdropping attacks. We also consider realistic systems where we assume that the detector dark count probability is not negligible.

UNIGE affiliation entities

Citation (ISO format)

BOURENNANE, Mohamed et al. Quantum key distribution using multilevel encoding: security analysis. In: Journal of physics. A, mathematical and general, 2002, vol. 35, n° 47, p. 10065–10076. doi: 10.1088/0305-4470/35/47/307

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Article (Published version)

Identifiers

Additional URL for this publication

http://stacks.iop.org/0305-4470/35/i=47/a=307?key=crossref.6e95dcf3e8880a4846f0ba551f11b091

Journal ISSN

0305-4470
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Technical informations

Creation

20/05/2014 14:11:00

First validation

20/05/2014 14:11:00

Update

14/03/2023 21:15:05

Status update

14/03/2023 21:15:05

Last indexation

30/10/2024 17:19:38
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