This article is cited in 10 papers

Quantum cryptography

Analysis of coherent quantum cryptography protocol vulnerability to an active beam-splitting attack

D. A. Kronberg^ab, E. O. Kiktenko^cd, A. K. Fedorov^efg, Yu. V. Kurochkin<sup>e

a</sup> Lomonosov Moscow State University
^b Steklov Mathematical Institute of Russian Academy of Sciences, Moscow
^c Bauman Moscow State Technical University
^d LLC 'DEFAN', Moscow, Skolkovo
^e International Center for Quantum Optics and Quantum Technologies (the Russian Quantum Center), Moscow region, Skolkovo
^f LLC "Acronis ", Moscow
^g Laboratoire de Physique Theorique d'Orsay, Université Paris-Sud 

Abstract: We consider a new type of attack on a coherent quantum key distribution protocol [coherent one-way (COW) protocol]. The main idea of the attack consists in measuring individually the intercepted states and sending the rest of them unchanged. We have calculated the optimum values of the attack parameters for an arbitrary length of a communication channel and compared this novel attack with a standard beam-splitting attack.

Keywords: quantum cryptography, quantum information theory.

Received: 19.10.2016
Revised: 12.12.2016

 English version: Quantum Electronics, 2017, 47:2, 163–168

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