Adaptive Modulation for Continuous-Variable Quantum Key Distribution With Real Local Oscillators Under Phase Attack

Citation

Alaghbari, Khaled Ab. Aziz and Rumyantsev, Konstantin and Eltaif, Tawfig and Elmabrok, Osama and Lim, Heng Siong (2021) Adaptive Modulation for Continuous-Variable Quantum Key Distribution With Real Local Oscillators Under Phase Attack. IEEE Photonics Journal, 13 (5). pp. 1-7. ISSN 1943-0647

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Abstract

Continuous-variable quantum key distribution (CV-QKD) with a real local oscillator (LO) experiences a phase attack security challenge due to the reference pulses transmitted along with quantum signals over an unsecure quantum channel. In this paper, a phase attack on reference pulses of CV-QKD with a real LO is investigated. The performance of the discrete-modulated (DM) CV-QKD under this attack is analyzed analytically and by simulation, and compared with the Gaussian-modulated (GM) CV-QKD. It is found that such an attack by an eavesdropper's, significantly reduce the transmission distance for the GM based CV-QKD, whereas, the DM based CV-QKD shows a high tolerance to high phase noise. Based on phase attack monitoring, a new adaptive modulation scheme is proposed for CV-QKD to adaptively switch between GM and DM so as to maintain the optimum secret key rate.

Item Type: Article
Uncontrolled Keywords: Cryptography, CV-QKD, quantum cryptography, phase attack, discrete modulation, adaptive modulation
Subjects: Q Science > QA Mathematics > QA150-272.5 Algebra
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 29 Oct 2021 05:01
Last Modified: 29 Oct 2021 05:01
URII: http://shdl.mmu.edu.my/id/eprint/9731

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