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Academic literature on the topic 'Satellite cv-qkd'

Author: Grafiati
Published: 25 May 2024

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Journal articles on the topic "Satellite cv-qkd"

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Xu, Shengjie, Yin Li, Yijun Wang, Yun Mao, Zhiyue Zuo, Xinchao Ruan, and Ying Guo. "Noiseless Attenuation for Continuous-Variable Quantum Key Distribution over Ground-Satellite Uplink." Applied Sciences 11, no. 23 (November 29, 2021): 11289. http://dx.doi.org/10.3390/app112311289.

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Satellite-based quantum key distribution (QKD) has lately received considerable attention due to its potential to establish a secure global network. Associated with its application is a turbulent atmosphere that sets a notable restriction to the transmission efficiency, which is especially challenging for ground-to-satellite uplink scenarios. Here, we propose a novel noiseless attenuation (NA) scheme involving a zero-photon catalysis operation for source preparation to improve the performance of continuous-variable (CV) QKD over uplink. Numerical analysis shows that the NA-based CV-QKD, under attenuation optimization, outperforms the traditional CV-QKD, which is embodied in extending the allowable zenith angle while improving the effective communication time. Attributing to characteristics of the attenuation optimization, we find that the NA-involved source preparation improves the security bound by relatively reducing the amount of information available to eavesdroppers. Taking the finite-size effect into account, we achieve a tighter bond of security, which is more practical compared with the asymptotic limit.
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Zuo, Zhiyue, Wenqi Peng, Hui Xian, Wenqi Jiang, Hao Luo, Sha Xiong, and Ying Guo. "Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization." Mathematics 11, no. 16 (August 18, 2023): 3584. http://dx.doi.org/10.3390/math11163584.

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The satellite-mediated continuous-variable quantum key distribution (CV-QKD) protocol, which relies on off-the-shelf telecommunication components, has the potential for a global quantum communication network with all-day operation. However, the transmittance fluctuation of satellite-mediated links leads to the arriving quantum state showing non-Gaussian property, introducing extra fading noise in security analysis and limiting the secret key rate of the protocol. Here, we consider the clusterization method for data post-processing to suppress the fading noise in both downlink and uplink scenarios, where the measurement data are divided into several clusters, and we perform security analysis separately. In particular, we set the optimal upper and lower bounds of each cluster in terms of the probability distribution of transmittance (PDT), while finding an optimal cluster number for the trade-off between fading noise and the composable finite-size effect. Numerical analysis shows that the proposed method can improve the composable finite-size rate when the fading noise is large enough, even with only two clusters. Moreover, a high-speed CV-QKD system with a higher frequency of signal preparation and detection can extend the proposed method to work in the case of lower fading noise.
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Hosseinidehaj, Nedasadat, and Robert Malaney. "CV-MDI quantum key distribution via satellite." Quantum Information and Computation 17, no. 5&6 (April 2017): 361–79. http://dx.doi.org/10.26421/qic17.5-6-1.

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In this work we analyze a measurement-device-independent (MDI) protocol to establish continuous-variable (CV) quantum key distribution (QKD) between two ground stations. We assume communication occurs between the ground stations via satellite over two independent atmospheric-fading channels influenced by turbulence-induced beam wandering. In this MDI protocol the measurement device is the satellite itself, and the security of the protocol is analyzed through an equivalent entanglement-based swapping scheme. We quantify the positive impact the fading channels can have on the final quantum key rates, demonstrating how the protocol is able to generate a positive key rate even over high-loss atmospheric channels provided that the maximum transmission coefficient of the channel is sufficiently large. This is somewhat counter-intuitive given that the same outcome is only possible in the low-loss regime for a measurement device centrally positioned in a fiber-optic channel. Our results show that useful space-based quantum key generation rates between two ground stations are possible even when the relay satellite is held by an adversary. The cost in key rate incurred by altering the status of the satellite from trustworthy to untrustworthy is presented.
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Alshaer, Nancy, Tawfik Ismail, and Mohamed E. Nasr. "Performance evaluation and security analysis of ground-to-satellite FSO system with CV-QKD protocol." IET Communications 14, no. 10 (June 23, 2020): 1534–42. http://dx.doi.org/10.1049/iet-com.2019.0795.

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Wang, Tyan-Lin, Ivan B. Djordjevic, and James Nagel. "Laser beam propagation effects on secure key rates for satellite-to-ground discrete modulation CV-QKD." Applied Optics 58, no. 29 (October 9, 2019): 8061. http://dx.doi.org/10.1364/ao.58.008061.

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Nguyen, Thang V., Hoa T. Le, Hien T. T. Pham, Vuong Mai, and Ngoc T. Dang. "Enhancing Design and Performance Analysis of Satellite Entanglement-based CV-QKD/FSO Systems." IEEE Access, 2023, 1. http://dx.doi.org/10.1109/access.2023.3323247.

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Ghalaii, Masoud, and Stefano Pirandola. "Quantum communications in a moderate-to-strong turbulent space." Communications Physics 5, no. 1 (February 10, 2022). http://dx.doi.org/10.1038/s42005-022-00814-5.

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AbstractSince the invention of the laser in the 60s, one of the most fundamental communication channels has been the free-space optical channel. For this type of channel, a number of effects generally need to be considered, including diffraction, refraction, atmospheric extinction, pointing errors and, most importantly, turbulence. Because of all these adverse features, the free-space optical (FSO) channel is more difficult to study than a stable fiber-based link. For the same reasons, only recently it has been possible to establish the ultimate performances achievable in quantum communications via free-space channels, together with practical rates for continuous variable (CV) quantum key distribution (QKD). Differently from previous literature, mainly focused on the regime of weak turbulence, this work considers the FSO channel in the more challenging regime of moderate-to-strong turbulence, where effects of beam widening and breaking are more important than beam wandering. This regime may occur in long-distance free-space links on the ground, in uplink to high-altitude platform systems (HAPS) and, more interestingly, in downlink from near-horizon satellites. In such a regime we rigorously investigate ultimate limits for quantum communications and show that composable keys can be extracted using CV-QKD.
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Dissertations / Theses on the topic "Satellite cv-qkd"

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Cusini, Gabriele. "Quantum Key Distribution with Continuous Variables for Satellite Systems." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Recenti studi hanno dimostrato come i più avanzati algoritmi per la generazione e scambio di chiavi crittografiche risultino insicuri contro la futura enorme capacità computazionale dei computer quantistici. Come è possibile ottenere una chiave completamente sicura, assumendo che i computer quantistici possano rendere i protocolli attuali insicuri? Una possibile soluzione consiste nell'impiego di protocolli come il Quantum Key Distribution (QKD) il quale usa un sistema di comunicazione quantistica per lo scambio della chiave. Tale sistema garantisce la segretezza della chiave in virtù delle proprietà quantistiche di entanglement e quella di sovrapposizione di stati quantistici. Nelle comunicazioni quantistiche esistono due principali modi per mappare le informazioni, il primo consiste nel considerare stati quantici discreti 'Discrete Variable quantum state' (DV) mentre il secondo li considera continui 'Continuous Variable quantum state' (CV). E' su questa ultima rappresentazione che si basa il protocollo QKD analizzato e in fine simulato in questo elaborato. La trattazione del protocollo CV QKD verrà svolta considerando uno scenario di comunicazione terra-satellite in quanto esso rappresenta un importante passo verso un sistema quantistico globale, non limitato dai problemi di distanze propri delle fibre ottiche o dei canali terrestri.
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Conference papers on the topic "Satellite cv-qkd"

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He, Mingjian, Robert Malaney, and Jonathan Green. "Photonic Engineering for CV-QKD Over Earth-Satellite Channels." In ICC 2019 - 2019 IEEE International Conference on Communications (ICC). IEEE, 2019. http://dx.doi.org/10.1109/icc.2019.8762003.

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Pan, Ziwen, and Ivan B. Djordjevic. "Security of Satellite-Based CV-QKD under Realistic Assumptions." In 2020 22nd International Conference on Transparent Optical Networks (ICTON). IEEE, 2020. http://dx.doi.org/10.1109/icton51198.2020.9203397.

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Hosseinidehaj, Nedasadat, and Robert Malaney. "CV-QKD with Gaussian and Non-Gaussian Entangled States over Satellite-Based Channels." In GLOBECOM 2016 - 2016 IEEE Global Communications Conference. IEEE, 2016. http://dx.doi.org/10.1109/glocom.2016.7841711.

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Wang, Qiang, Thara Son, Meixiang Zhang, and Sooyoung Kim. "Application of Adaptive Polar Code based CV-QKD Scheme for LEO Satellite Systems." In 2023 14th International Conference on Information and Communication Technology Convergence (ICTC). IEEE, 2023. http://dx.doi.org/10.1109/ictc58733.2023.10392481.

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Wang, Tyan-Lin, Ivan B. Djordjevic, and James Nagel. "Laser Beam Propagation Effects on Secure Key Rates for Satellite CV-QKD with Discrete Modulation." In 2019 IEEE Photonics Conference (IPC). IEEE, 2019. http://dx.doi.org/10.1109/ipcon.2019.8908317.

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