Role of intensity fluctuations in quantum cryptography with coherent states
D. A. Kronberga, Yu. V. Kurochkinb
a Steklov Mathematical Institute of Russian Academy of Sciences, Moscow
b International Center for Quantum Optics and Quantum Technologies (the Russian Quantum Center), Moscow, Skolkovo
A new type of attack in quantum cryptography with coherent states is considered. This attack calls for only a possibility of changing (within some limits) the intensity of the states reaching a receiver. The critical quantum bit error rate (QBER) of the B92 protocol with a strong reference state is calculated for different limitations on intensity.
quantum cryptography, quantum information, coherent states.
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Quantum Electronics, 2018, 48:9, 843–848
D. A. Kronberg, Yu. V. Kurochkin, “Role of intensity fluctuations in quantum cryptography with coherent states”, Kvantovaya Elektronika, 48:9 (2018), 843–848 [Quantum Electron., 48:9 (2018), 843–848]
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