= Artur Ekert
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{tag=Physicist}
{wiki}
= Artur K. Ekert
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{synonym}
<Artur Ekert> proposed deriving a shared cryptographic key from measurements on <entangled> particle pairs while testing other measurement settings through a <Bell inequality>. The different settings therefore serve two purposes: correlated results supply candidate key bits, and the observed <correlations> constrain possible descriptions of the source and an eavesdropper. The proposal connected a foundational test of <quantum mechanics> with the operational task of <quantum key distribution>, under the assumptions of its measurement and security model.<Quantum cryptography based on Bell's theorem by Artur K. Ekert>[1991 proposal, entangled pairs, key settings and Bell-correlation test]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Professor%20Artur%20Ekert%20FRS%20%28cropped%29.jpg?width=250]
{title=Portrait of <Artur Ekert>}
{description=The Royal Society (required attribution); Commons author field: Duncan.Hull; existing crop by Ravenpuff. https://creativecommons.org/licenses/by-sa/3.0/[CC BY-SA 3.0], via Wikimedia Commons.}
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{width=250}
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