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Quantum key distribution network and quantum key distribution method and device

A quantum key distribution and quantum key technology, applied in the field of quantum key distribution, can solve problems such as transmission distance limitation, MDI-QKD performance degradation, and star network implementation distance limitation, and achieve the effect of improving security.

Active Publication Date: 2021-06-29
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

However, the MDI-QKD-based star network has a limited distance, and how to relay between star networks is an unsolved problem.
[0014] However, in most QKD networks in real-world scenarios, it is difficult to ensure that all nodes are completely trusted, and trusted nodes and untrusted nodes coexist. Therefore, if trusted relay technology is used in this scenario, there are security issues; and the use of MDI-QKD technology has the problem of being limited by the transmission distance, that is to say, the performance of MDI-QKD will gradually decrease when the transmission distance increases

Method used

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  • Quantum key distribution network and quantum key distribution method and device

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0054] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechan...

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Abstract

The present invention provides a quantum key distribution network and a quantum key distribution method and device. The method includes: determining a trusted relay route from a source node to a destination node; wherein, the trusted relay route in the The relay nodes are all trusted nodes, and the distance between adjacent nodes is less than or equal to 2 hops; for each pair of adjacent nodes whose distance is 2 hops in the trusted relay route, determine the Untrusted node; Based on the trusted relay route and the determined relay of the untrusted node, the distribution of the shared quantum key between the source node and the destination node is realized; wherein, the trusted nodes are all provided with QKD Transmitters and receivers; non-trusted nodes are equipped with QKD transmitters and MDI‑QKD receivers. By applying the present invention, under the scenario where trusted nodes and untrusted nodes coexist, the relay node can be used to realize quantum key distribution between two remote nodes, thereby improving the security of the QKD network.

Description

technical field [0001] The present invention relates to the technical field of quantum key distribution, in particular to a quantum key distribution network and a quantum key distribution method and device. Background technique [0002] In today's information age, the security of network information is facing serious security risks. The security of the quantum secure communication network is guaranteed by the basic laws of quantum mechanics such as its "Heisenberg Uncertainty Principle" and "Quantum Uncloning Law", which has the advantage of "unconditional security" in theory. With the rapid development of communication networks, the application fields of quantum communication technology are constantly being broadened. A typical application with relatively mature development and potential for industrialization at this stage is the quantum secret communication network based on QKD (Quantum Key Distribution, quantum key distribution). [0003] At present, from a technical pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0852H04L9/0855
Inventor 郁小松邹兴裕赵永利张杰张立中冯斐斐
Owner BEIJING UNIV OF POSTS & TELECOMM
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