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Security of quantum-key-distribution protocol by using the post-selection technique

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dc.contributor.author Sekga, Comfort
dc.contributor.author Mafu, Mhlambululi
dc.date.accessioned 2021-08-24T13:38:11Z
dc.date.available 2021-08-24T13:38:11Z
dc.date.issued 2021-05
dc.identifier.citation Sekga, C. and Mafu, M. (2021) Security of quantum-key-distribution protocol by using the post-selection technique. Physics Open, 7, [100075]. https://doi.org/10.1016/j.physo.2021.100075 en_US
dc.identifier.issn 26660326
dc.identifier.uri http://repository.biust.ac.bw/handle/123456789/324
dc.description.abstract The post-selection technique was proposed by Christandl, König, and Renner [Phys. Rev. Lett. 102, 020504 (2009)] to simplify the security of quantum-key-distribution schemes. This work applies this technique to derive the security bounds for the six-state Scarani-Acin-Rigbordy-Gisin 2004 quantum key distribution protocol. This protocol can extract secure keys from a source emitting multi-photons due to its robustness from photon number splitting attacks, making it a good candidate for practical implementations. We also compare the security bounds for this protocol under collective attacks to the security bounds obtained after applying the post-selection technique when using finite resources. Our results demonstrate that the bounds for optimal attack are close to the bound for collective attack for many signals. Notably, the six-state SARG04 protocol proves to be more robust to the PNS attacks when compared to the original four-state SARG04 protocol. This demonstrates the power of the post-selection technique in deriving the security bounds for the six-state protocol when finite resources are used. en_US
dc.description.sponsorship Botswana International University of Science and Technology Research Initiation Grants R00015 and S00100. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. en_US
dc.subject Quantum key distribution en_US
dc.subject SARG04 protocol en_US
dc.subject Post-selection technique en_US
dc.subject Finite resources en_US
dc.title Security of quantum-key-distribution protocol by using the post-selection technique en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department paa en_US


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