On the security of fiber optic quantum cryptography systems without the control of the intensity of quasi-single-photon coherent states

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• 作者：S. N. Molotkov
• 刊名：JETP Letters
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：101
• 期：8
• 页码：579-585
• 全文大小：284 KB
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• 作者单位：S. N. Molotkov (1) (2) (3)
  
  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia
  2. Academy of Cryptography of the Russian Federation, Moscow, 121552, Russia
  3. Faculty of Computational Mathematics and Cybernetics, Moscow State University, Moscow, 119991, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Atoms, Molecules, Clusters and Plasmas
  Solid State Physics and Spectroscopy
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6487

文摘

Internal losses in systems of quantum cryptography can be used at attacks by an eavesdropper. As a result, the security of keys cannot be ensured for a number of protocols. This problem can be solved by using geometrically uniform coherent states with a larger number of bases. The security of keys at the number of bases N b /2 = 4 and the number of states N b = 8 can be guaranteed even without the control of the intensity of input states.