8-12 July 2013
Africa/Johannesburg timezone
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Finite-size key in QKD protocols for Renyi entropies

Presented by Mr. Mhlambululi MAFU on 10 Jul 2013 from 11:30 to 11:50
Type: Oral Presentation
Session: Theoretical
Track: Track G - Theoretical and Computational Physics

Abstract

A realistic quantum key distribution protocol necessarily runs with finite resources. This is in contrast to the existing quantum key distribution security proofs which are asymptotic, in the sense that they only work if certain parameters are exceedingly large as compared to practical realistic values. In this paper, we spell out the bounds and formalism to derive bounds on the secret key rates for the B92 protocol [Phys. Rev. Letter, 68. 3121 1992] which includes a preprocessing step. This is expressed as an optimization problem by using the recent results on the uncertainty relation and the smooth Renyi entropies.

Award

Yes

Level

PhD

Supervisor

Prof Francesco Petruccione, petruccione@ukzn.ac.za, University of KwaZulu-Natal

Paper

Yes

Place

Location: A1-10


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