Fake calibration attack using a beam sampler in a continuous variable-quantum key distribution system

J. A. Lopez-Leyva, A. Talamantes-Alvarez, E. A. Mejia, J. Estrada, M. Ponce Camacho, V. Ramos Garcia, L. Casemiro Oliveira


A Fake Calibration Attack process for a Continuous Variable-Quantum Key Distribution system using a Beam Sampler is presented. The Fake Calibration Attack allows a calibration that balances the Standard Quantum Limit for all the optical path in the experiment (differential Standard Quantum Limit is ≈ 0.39 dB) allowing Eve to acquire ≈ 0.0671 for a particular information quadrature which establishes a Quantum Bit Error Rate ≈ 5.8%. As a final result, the balancing of the Standard Quantum Limit for both states of polarization signals allows maintaining the overall Quantum Bit Error Rate at a particular value ≈ 3%, which implies an important basis for detecting a potential spy considering the minimum Quantum Bit Error Rate.


Quantum cryptography, unbalanced optical paths, state of polarization, calibration attack

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DOI: https://doi.org/10.31349/RevMexFis.66.228


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