On the optimality of individual entangling-probe attacks against BB84 quantum key distribution

Autor(en)

I. Herbauts, S. Bettelli, H. Hübel, M. Peev

Abstrakt

It is shown that an existing method to study ideal individual attacks on the BB84 QKD protocol using error discard can be adapted to reconciliation with error correction, and that an optimal attack can be explicitly found. Moreover, this attack fills Luetkenhaus bound, independently of whether error positions are leaked to Eve, proving that it is tight. In addition, we clarify why the existence of such optimal attacks is not in contradiction with the established ``old-style'' theory of BB84 individual attacks, as incorrectly suggested recently in a news feature.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Austrian Research Centers GmbH (ARC Seibersdorf)

Journal

European Physical Journal D

Band

46

Seiten

395–406

ISSN

1434-6060

DOI

https://doi.org/10.1140/epjd/e2008-00002-x

Publikationsdatum

02-2008

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik, 103025 Quantenmechanik, 103036 Theoretische Physik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cd102b30-2f57-4439-b12e-51d895cdab94