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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2016, Volume 103, Issue 5, Pages 389–393
DOI: https://doi.org/10.7868/S0370274X16050118
(Mi jetpl4887)
 

This article is cited in 4 scientific papers (total in 4 papers)

QUANTUM INFORMATION SCIENCE

On the complexity of search for keys in quantum cryptography

S. N. Molotkovabc

a Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia
b Academy of Cryptography of the Russian Federation, Moscow, 121552, Russia
c Faculty of Computational Mathematics and Cybernetics, Moscow State University, Moscow, 119991, Russia
Full-text PDF (173 kB) Citations (4)
References:
Abstract: The trace distance is used as a security criterion in proofs of security of keys in quantum cryptography. Some authors doubted that this criterion can be reduced to criteria used in classical cryptography. The following question has been answered in this work. Let a quantum cryptography system provide an $\varepsilon$-secure key such that $\frac{1}{2}|| \rho_{XE}-\rho_U\otimes \rho_E ||_1<\varepsilon$, which will be repeatedly used in classical encryption algorithms. To what extent does the $\varepsilon$-secure key reduce the number of search steps (guesswork) as compared to the use of ideal keys? A direct relation has been demonstrated between the complexity of the complete consideration of keys, which is one of the main security criteria in classical systems, and the trace distance used in quantum cryptography. Bounds for the minimum and maximum numbers of search steps for the determination of the actual key have been presented.
Received: 02.11.2015
Revised: 18.01.2016
English version:
Journal of Experimental and Theoretical Physics Letters, 2016, Volume 103, Issue 5, Pages 345–349
DOI: https://doi.org/10.1134/S002136401605009X
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: S. N. Molotkov, “On the complexity of search for keys in quantum cryptography”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:5 (2016), 389–393; JETP Letters, 103:5 (2016), 345–349
Citation in format AMSBIB
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  • This publication is cited in the following 4 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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