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A quantum key distribution method and system based on a tree-shaped qkd network

A quantum key distribution and network technology, which is applied in the field of quantum key distribution methods and systems, and can solve problems such as limited transmission distances

Active Publication Date: 2021-04-27
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the transmission distance of MDI-QKD is limited. How to break through the limitation of distance in the real scene is a problem that must be faced in order to realize the large-scale practical application of the MDI-QKD scheme.

Method used

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  • A quantum key distribution method and system based on a tree-shaped qkd network
  • A quantum key distribution method and system based on a tree-shaped qkd network
  • A quantum key distribution method and system based on a tree-shaped qkd network

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a quantum key distribution method and system based on a tree-shaped QKD network. In a tree-shaped network, when the parent node of the source node and the destination node are the same node, if the parent node is an untrusted node, the source node and the destination node The node uses the parent node as an MDI-QKD detector to generate a key. If the parent node is a trusted node, the shared key is directly transmitted through the XOR relay; when the parent node of the source node and the destination node are not the same node, and the transmission When there are untrusted relay nodes that appear discontinuously in the path, the untrusted nodes are used as MDI-QKD detectors to generate keys, and then the shared keys are transmitted through the XOR relay method. The invention can realize quantum key distribution between any two points in the tree-shaped network under the condition that some nodes are trusted, and effectively reduces the construction and deployment costs of the quantum key distribution network.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a quantum key distribution method and system based on a tree QKD network. Background technique [0002] At present, commercial quantum secure communication systems are mainly implemented based on Quantum Key Distribution (QKD) technology. Based on the principles of quantum mechanics, QKD can securely distribute shared random number sequences (which can be used as symmetric keys for encryption and decryption, message authentication, etc.) between communicating parties, and attackers cannot eavesdrop on public channels. Quantum key distribution is different from classical cryptography. Its security does not depend on the computational complexity of mathematical algorithms, but is based on the basic laws of quantum physics, which can provide unique long-term security guarantees. [0003] According to the composition structure and technical principles of the QKD system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/085H04L9/0819H04L9/0855H04L9/0861H04L9/0827
Inventor 陈熹杨力帆侯功华林昕怡林巍王远征邹保平黄莘程陈微钱思源李恺黄长贵叶跃骈冯笑黎金城林睫菲陈如尹
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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