![Thumbnail](/bitstream/handle/20.500.11850/79280/PhysRevA.88.062302.pdf.jpg?sequence=4&isAllowed=y)
Open access
Datum
2013-12Typ
- Journal Article
Abstract
Quantum key distribution protocols typically make use of a one-way quantum channel to distribute a shared secret string to two distant users. However, protocols exploiting a two-way quantum channel have been proposed as an alternative route to the same goal, with the potential advantage of outperforming one-way protocols. Here we provide a strategy to prove security for two-way quantum key distribution protocols against the most general quantum attack possible by an eavesdropper. We utilize an entropic uncertainty relation, and only a few assumptions need to be made about the devices used in the protocol. We also show that a two-way protocol can outperform comparable one-way protocols. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000079280Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Physical Review ABand
Seiten / Artikelnummer
Verlag
American Physical SocietyOrganisationseinheit
03781 - Renner, Renato / Renner, Renato
Förderung
135048 - Information-theoretic methods for physics (SNF)
258932 - Generalized (quantum) information theory (EC)