Resumo

LOPEZ-LEYVA, J. A. et al. Fake calibration attack using a beam sampler in a continuous variable-quantum key distribution system. Rev. mex. fis. [online]. 2020, vol.66, n.2, pp.228-231.  Epub 26-Mar-2021. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.66.228.

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.

Palavras-chave : Quantum cryptography; unbalanced optical paths; state of polarization; calibration attack; 03.67.Dd; 42.79.Ci; 06.20.fb.

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