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Continuous variable quantum key distribution system and implementation method based on k-nearest neighbor processing

A quantum key distribution, k-nearest neighbor technology, applied in key distribution, can solve problems such as reducing system performance, and achieve the effect of overcoming various noises, improving performance, and improving accuracy

Inactive Publication Date: 2021-04-23
CENT SOUTH UNIV
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Problems solved by technology

[0004] In order to achieve the above object, the present invention provides a continuous variable quantum key distribution system and its implementation method based on k-nearest neighbor processing, which solves the problems of various noises in the quantum key distribution system in the prior art, and the noise will reduce the system's performance. performance problem

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  • Continuous variable quantum key distribution system and implementation method based on k-nearest neighbor processing

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] Discretely modulated continuous variable quantum key distribution systems based on k-nearest neighbor postprocessing, such as Figure 1-2 shown, including:

[0042] The quantum key sending end is used for key generation, discretely modulates the quantum signal, and sends the modulated signal to the quantum key receiving end through the quantum channel;

[0043] The quantum key receiving end is used to receive and detect the quantum signal, and send the...

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Abstract

The invention discloses a continuous variable quantum key distribution system and an implementation method based on k-nearest neighbor processing. The quantum key sending end performs discrete modulation on the quantum signal and sends it to the quantum key receiving end. The received signal is detected, and the detection result is sent to the post-processing module based on k-nearest neighbor, and the post-processing module based on k-nearest neighbor uses the k-nearest neighbor method to process the received signal. The invention can overcome various noises in the quantum key distribution system, especially the non-Gaussian symmetric noise, and further improves the actual security of the discretely modulated continuous variable quantum key distribution system.

Description

technical field [0001] The invention belongs to the technical field of optical fiber quantum communication, and relates to a discrete modulation continuous variable quantum key distribution system and an implementation method based on k-nearest neighbor processing. Background technique [0002] Quantum key distribution enables two long-distance untrusted quantum channels to safely share keys, and its security is guaranteed by the uncertainty principle of quantum mechanics and the quantum non-cloning theorem. At present, quantum key distribution is divided into two types: discrete variable and continuous variable. Compared with discrete variable quantum key distribution, the quantum state of continuous variable quantum key distribution is easier to prepare, can be integrated into existing optical fiber systems, and can use efficient and low-cost homodyne detection or heterodyne detection technology, which makes Continuous variable quantum key distribution systems are more li...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0858
Inventor 郭迎李嘉伟赵微谢才浪
Owner CENT SOUTH UNIV
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