Active Beam Splitting Attack Applied to Differential Phase Shift Quantum Key Distribution Protocol


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Abstract

The differential phase shift quantum key distribution protocol is of high interest due to its relatively simple practical implementation. This protocol uses trains of coherent pulses and allows the legitimate users to resist individual attacks. In this paper, a new attack on this protocol is proposed which is based on the idea of information extraction from the part of each coherent state and then making decision about blocking the rest part depending on the amount of extracted information.

About the authors

A. S. Avanesov

Moscow Institute of Physics and Technology

Author for correspondence.
Email: daypatu@rambler.ru
Russian Federation, 9 Institutskiy per., Dolgoprudny, 141701, Moscow Region

D. A. Kronberg

Steklov Mathematical Institute of Russian Academy of Sciences

Email: daypatu@rambler.ru
Russian Federation, Gubkina str. 8, Moscow, 119991

A. N. Pechen

Steklov Mathematical Institute of Russian Academy of Sciences; The National University of Science and Technology “MISiS”

Email: daypatu@rambler.ru
Russian Federation, Gubkina str. 8, Moscow, 119991; Leninsky Prospekt 4, Moscow, 119991

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