OPTIMAL EAVESDROPPING ON NOISY STATES IN QUANTUM KEY DISTRIBUTION
2009 ◽
Vol 07
(01)
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pp. 297-306
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Keyword(s):
We study eavesdropping in quantum key distribution with the six state protocol, when the signal states are mixed with white noise. This situation may arise either when Alice deliberately adds noise to the signal states before they leave her lab, or in a realistic scenario where Eve cannot replace the noisy quantum channel by a noiseless one. We find Eve's optimal mutual information with Alice, for individual attacks, as a function of the qubit error rate. Our result is that added quantum noise reduces Eve's mutual information more than Bob's.
Keyword(s):
2021 ◽
Keyword(s):
Keyword(s):
2017 ◽
Vol 67
(4)
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pp. 360
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Keyword(s):
2013 ◽
Vol 7
(3)
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pp. 341-348
2014 ◽
Vol 560
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pp. 46-61
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