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Open access
Date
2013-12Type
- 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. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000079280Publication status
publishedExternal links
Journal / series
Physical Review AVolume
Pages / Article No.
Publisher
American Physical SocietyOrganisational unit
03781 - Renner, Renato / Renner, Renato
Funding
135048 - Information-theoretic methods for physics (SNF)
258932 - Generalized (quantum) information theory (EC)
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