Abstract
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.
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Original Russian Text © S.N. Molotkov, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 101, No. 8, pp. 637–643.
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Molotkov, S.N. On the security of fiber optic quantum cryptography systems without the control of the intensity of quasi-single-photon coherent states. Jetp Lett. 101, 579–585 (2015). https://doi.org/10.1134/S002136401508010X
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DOI: https://doi.org/10.1134/S002136401508010X