Pushing keys through quantum networks and the complexity of search of the true keyстатья
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:The question of the transfer of an external independent key through trusted nodes, betweenwhich the keys obtained during the quantum key distribution are located, is investigated. It isshown that when pushing external εK -secret key through a chain of trusted nodes connectingseparate segments with εi-secret keys obtained by quantum key distribution, the final matchedkey between the extreme nodes of the network turns out to be ε = εK +PNsi=1 εi-secret (where iis the number of the network segment, Ns is the number of network segments connecting theextreme nodes), provided that the external key is encrypted on the εi–secret keys in the one-timepad mode. It is also shown that for any measurements of an eavesdropper providing him withadditional information about the keys, the complexity of partial/complete search for an matchedkey is determined by the secrecy parameter ε.