Semi-device-independent security of one-way quantum key distribution

M Pawlowski, N Brunner

Research output: Contribution to journalArticle (Academic Journal)peer-review

197 Citations (Scopus)


By testing nonlocality, the security of entanglement-based quantum key distribution (QKD) can be enhanced to being “device-independent.” Here we ask whether such a strong form of security could also be established for one-way (prepare and measure) QKD. While fully device-independent security is impossible, we show that security can be guaranteed against individual attacks in a semi-device-independent scenario. In the latter, the devices used by the trusted parties are noncharacterized, but the dimensionality of the quantum systems used in the protocol is assumed to be bounded. Our security proof relies on the analogies between one-way QKD, dimension witnesses, and random-access codes.
Translated title of the contributionSemi-device-independent security of one-way quantum key distribution
Original languageEnglish
Pages (from-to)010302(R) - 010305(R)
Number of pages4
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Publication statusPublished - Jul 2011

Bibliographical note

Publisher: APS


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