Study of the Vulnerability of Neutral Optical Filters Used in Quantum Key Distribution Systems against Laser Damage Attack

Alferov, S. V.; Bugai, Kirill E.; Pargachev, I. A.

doi:10.1134/s0021364022601117

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…(2) The fringe fields at the entrance and exit regions of the magnets are negligible. (3) The difference between electron path lengths in the wiggler and the straight sections is negligible for the longitudinal length of the straight section of / l g 2. (4) The distance of the observation position from the center of the ERU is significantly larger than the ERU length.…”

Section: Eru Model and Its Radiation Propertiesmentioning

confidence: 99%

Investigation of edge radiation intensification effect generated by periodic alignment of three-pole wigglers

Koda¹,

Takabayashi²,

Kaneyasu³

et al. 2022

Jpn. J. Appl. Phys.

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The intensification effect of edge radiation due to the periodic alignment of three-pole wigglers was analytically and numerically investigated. The radiation properties were studied using a simple model that had an alternating alignment of straight sections and large gradient orbit sections due to the use of three-pole wigglers. The angular distribution of the radiation was concentrated on a concentric circle. The peak intensity of the radiation was roughly on the same order as that of the peak radiation of a planar undulator. The spectrum of the radiation had a characteristic structure that was rather similar to the higher harmonic structure of undulator radiation. A numerical study showed that a planar undulator with a specific K value satisfies approximately the radiation intensification condition due to the periodic alignment of the three-pole wigglers. The intensified edge radiation is included in the undulator radiation.

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Section: Eru Model and Its Radiation Propertiesmentioning

confidence: 99%

Investigation of edge radiation intensification effect generated by periodic alignment of three-pole wigglers

Koda¹,

Takabayashi²,

Kaneyasu³

et al. 2022

Jpn. J. Appl. Phys.

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“…Note that certain types of attenuators resistant to LDA were demonstrated in [4,5]. However, the authors of these studies point out that an LDA against this attenuators may be efficient at higher radiation powers or longer exposures.…”

mentioning

confidence: 99%

“…The measurement setup and procedure used to tests the constructed prototypes corresponded to the ones detailed in [4,5]. The primary difference was in the use of a lower reference laser power that did non induce mirror collapse in measurements of the initial attenuation.…”

mentioning

confidence: 99%

Study of the vulnerability of device based on collapsing mirror used in quantum key distribution systems

Alferov¹,

Bugai

Pargachev³

et al. 2023

Technical Physics Letters

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An attack on equipment with laser damage of optical components called " laser damage attack", can allow the eavesdropper to reduce the attenuation of optical elements and compromise distributed keys. A method of protection against this attack based on a device with a collapsing mirror has been considered. The conclusion based on experimental data about the effectiveness of the proposed method of protection has been made.. Keywords: quantum key distribution, laser damage attack, eavesdropper, symmetric cryptography.

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Trojan-horse attack on a real-world quantum key distribution system: Theoretical and experimental security analysis

Sushchev,

Bulavkin,

Bugai

et al. 2024

Phys. Rev. Applied

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This paper presents a theoretical and experimental demonstration of a security analysis of a Trojan-horse attack (THA) on a real-world quantum key distribution (QKD) system. We show that the upper bound on the information leakage depends solely on the fidelity between the states of the adversary. We find the lower bound for fidelity between THA states in both the polarization- and phase-coding BB84 protocols, considering both pure and mixed states. Our bounds depend only on the mean photon number per pulse available to an adversary. We also present an experimental analysis of a QKD system, including optical time-domain reflectometry measurements with centimeter resolution and spectral transmittance measurements for optical defense elements ranging from 1100 to 1800 nm with a noise floor lower than −100 dB. Finally, by considering the optimal attack, we obtain the value of the mean photon number per pulse available to an adversary and calculate the key leakage that needs to be eliminated during the privacy amplification procedure. Published by the American Physical Society 2024

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Study of the Vulnerability of Neutral Optical Filters Used in Quantum Key Distribution Systems against Laser Damage Attack

Cited by 4 publications

References 5 publications

Investigation of edge radiation intensification effect generated by periodic alignment of three-pole wigglers

Investigation of edge radiation intensification effect generated by periodic alignment of three-pole wigglers

Study of the vulnerability of device based on collapsing mirror used in quantum key distribution systems

Trojan-horse attack on a real-world quantum key distribution system: Theoretical and experimental security analysis

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