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Self-adaptive multiband underwater wireless quantum key distribution system and method

A quantum key distribution and multi-band technology, which is applied in the field of adaptive multi-band underwater wireless quantum key distribution system, can solve the problems of low key transmission efficiency and communication efficiency

Pending Publication Date: 2020-09-29
OCEAN UNIV OF CHINA
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Problems solved by technology

[0008] The purpose of the present invention is to provide an adaptive multi-band underwater wireless quantum key distribution system and method. The present invention can automatically adjust the channel according to the real-time change and attenuation of the channel before and during the distribution of the underwater wireless quantum key. The wavelength of quantum signal and classical signal light realizes the lowest quantum bit error rate QBER in the current channel environment, and solves the technical problem of low key transmission efficiency and communication efficiency caused by dynamic changes in water bodies in the prior art

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[0060] 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 of the embodiments of the present invention, not all of them. 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.

[0061] Such as figure 1 As shown, an adaptive multi-band underwater wireless quantum key distribution system, the system includes a transmitter and a receiver. On the basis of the BB84 communication protocol, the two ends of the transmitting end and the receiving end interact in real time, and according to the change of the quantum bit error rate QBER caused by the real-time change of the channel, quantum optical signals of different wavelengths ...

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Abstract

The invention discloses a self-adaptive multiband underwater wireless quantum key distribution system and method. The system comprises a transmitting end and a receiving end. Based on a BB84 communication protocol, the transmitting end and the receiving end interact with each other in real time, and generate quantum optical signals and classic optical signals with different wavelengths through theadjustable optical module to perform underwater wireless quantum key distribution and underwater wireless classic optical communication according to the change condition of quantum bit error rate QBER caused by real-time change of a channel; based on the real-time change conditions of water channels of different water bodies or the same water body water channel, the signal light wavelength can beautomatically adjusted, the change of the water channel is adapted in real time, the bit error rate is reduced, and finally the maximum key generation rate of the underwater wireless quantum key distribution system under the current channel is achieved.

Description

technical field [0001] The invention relates to an underwater wireless quantum communication method, which belongs to the technical field of quantum key distribution, in particular to an adaptive multi-band underwater wireless quantum key distribution system and method. Background technique [0002] Driven by the communication needs of underwater sensor networks, submarines and various underwater vehicles, underwater wireless optical communication has developed rapidly in recent years, and underwater wireless quantum key distribution (Quantum Key Distribution-QKD) can be It provides absolutely safe means of confidentiality. [0003] Common water bodies are mainly divided into fresh water and sea water. The main components of fresh water are pure water and dissolved substances such as carbonates, sulfates, and calcium, while seawater is mainly composed of pure water and dissolved substances such as chlorides. [0004] According to the light absorption coefficients of fresh ...

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Application Information

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IPC IPC(8): H04L9/08H04B10/70H04B10/50H04B10/60
CPCH04B10/503H04B10/60H04B10/70H04L9/0852
Inventor 钱添于永河李文东韩鑫红张新建顾永建
Owner OCEAN UNIV OF CHINA
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