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Security of quantum key distribution with bit and basis dependent detector flaws

Lydersen, Lars; Skaar, Johannes
Journal article, Peer reviewed
View/Open
445069_FULLTEXT01.pdf (Locked)
URI
http://hdl.handle.net/11250/2370275
Date
2010
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  • Institutt for elektroniske systemer [2223]
Abstract
We consider the security of the Bennett-Brassard 1984 (BB84) protocol for Quantum Key Distribution (QKD), in the presence of bit and basis dependent detector flaws. We suggest a powerful attack that can be used in systems with detector efficiency mismatch, even if the detector assignments are chosen randomly by Bob. A security proof is provided, valid for any basis dependent, possibly lossy, linear optical imperfections in the channel/receiver/detectors. The proof does not assume the so-called squashing detector model.
Publisher
Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elektronikk og telekommunikasjon
Journal
Quantum information & computation

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