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Optimal cost topology construction method of hybrid QKD network system

A technology of network system and construction method, applied in the field of optimal cost topology construction of hybrid QKD network, which can solve problems such as lack of cost estimation

Active Publication Date: 2020-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the lack of cost estimation for hybrid networking of different types of QKD equipment in the prior art, the present invention provides a method for constructing an optimal cost topology of a hybrid QKD network system

Method used

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  • Optimal cost topology construction method of hybrid QKD network system
  • Optimal cost topology construction method of hybrid QKD network system
  • Optimal cost topology construction method of hybrid QKD network system

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Embodiment Construction

[0075] The method for constructing the optimal cost topology of the hybrid QKD network system in this embodiment includes:

[0076] S1. Construct a hybrid QKD network system, the hybrid QKD network system including C2C-QKD equipment and CSC-QKD equipment;

[0077] According to the difference in fiber dependence, when S1 of this embodiment constructs a hybrid QKD network system, the QKD protocol is divided into two classification mechanisms: C2C-QKD protocol and CSC-QKD protocol. C2C-QKD protocol refers to In the key distribution process, only a type of agreement that connects the two parties through an optical fiber is required to form a C2C-QKD device such as figure 1 As shown, BB84-QKD, decoy-QKD, E91-QKD and other protocols are all of this type. The CSC-QKD protocol requires the participation of an untrusted third party. Both communication parties are connected to an untrusted third party through an optical fiber. The CSC-QKD equipment is composed of figure 2 As shown, MDI-QKD...

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Abstract

The invention discloses an optimal cost topology construction method of a hybrid QKD network system, solves the problem of lack of cost estimation for hybrid networking of different types of QKD equipment in the prior art, and belongs to the field of secret communication. The method comprises the following steps: S1, constructing a hybrid QKD network system, wherein the hybrid QKD network system comprises C2C-QKD equipment and CSC-QKD equipment; S2, simulating a hybrid QKD network system by using a physical topology G = (V, E, F); S3, taking minimum total cost as a target, taking bandwidth limitation, flow conservation, flow demand and credibility limitation of physical topology network flow as constraint conditions, and taking the number of QKD equipment on each side, the actual flow of each communication pair and each network flow value as decision variables to construct an optimization model; and S4, solving the optimization model to obtain the optimal cost.

Description

Technical field [0001] The present invention relates to a method for constructing an optimal cost topology of a QKD network system, in particular to a method for constructing an optimal cost topology of a hybrid QKD network including cost indicator proposal and optimal cost calculation, and belongs to the field of secure communication. Background technique [0002] With the continuous improvement of quantum computing capabilities, the communication security of optical networks has been seriously threatened. Quantum key distribution (QKD) technology based on quantum basic principles can distribute keys that can resist quantum computing attacks and have absolute security in theory. It is currently the most practical means of anti-quantum secure communication. Therefore, trying to apply QKD technology to optical networks and building a QKD network based on quantum keys will significantly improve its security. [0003] Considering that QKD devices have the exclusivity of quantum chann...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L9/08H04B10/70
CPCH04L41/12H04L9/0852H04L9/0819H04B10/70
Inventor 李琼王亚星刘兆庆韩琦毛昊坤
Owner HARBIN INST OF TECH