Centralized quantum cryptography network group key distribution method and system

A quantum cryptography and group key technology, applied in the field of a centralized quantum cryptography network group key distribution method and system, can solve the problem of not considering the group key distribution path cost, increasing the group key distribution path cost, increasing the group key Encrypted communication costs and other issues, to achieve the effect of saving path costs, increasing speed, and reducing path costs

Pending Publication Date: 2022-07-01
QUANTUMCTEK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention does not consider the path cost of group key distribution, does not adopt the optimal path for group key distribution, increases the path cost of group key distribution, and thus increases the cost of group key encrypted communication

Method used

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  • Centralized quantum cryptography network group key distribution method and system

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Embodiment 1

[0045] A centralized quantum cryptography network group key distribution method, comprising the following steps:

[0046] In each routing period, the information of nodes newly joining or exiting the group communication is obtained. In this embodiment, the node ID of the quantum cryptography network where the group members are located can be selected;

[0047] Aiming at the best overall path of group key distribution, calculate the routing spanning tree for group key distribution in the next routing cycle according to the routing graph of the quantum cryptography network;

[0048]According to the routing spanning tree information, the root node of the routing spanning tree starts group key distribution and transfers it layer by layer. Specifically, the group key distribution starts from the root node of the routing spanning tree. The node selects a true random number as the group key, saves the group key, and at the same time relays the group key to each child node of the root...

Embodiment 2

[0061] like figure 1 As shown, a centralized quantum cryptography network group key distribution system, the entire system includes a group communication authentication server, a routing server for group key distribution, and a quantum cryptography network node (referred to as a group node) where group members participating in group communication are located. .

[0062] A group key distribution routing server (hereinafter referred to as a routing server) is established in the quantum cryptographic network to provide group nodes with routing services for group key distribution. The routing server is connected with the group communication authentication server, and the group communication authentication server is responsible for the registration, login authentication and exit management of the group members participating in the group communication.

[0063] When the group communication starts, the group communication authentication server sends the quantum cryptography network ...

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Abstract

The invention provides a centralized quantum cryptography network group key distribution method and system. The method comprises the following steps: acquiring node information of newly joining or quitting group communication; calculating a routing spanning tree of group key distribution in the next routing period according to the routing graph of the quantum cryptography network by taking the optimal total path of group key distribution as a target; starting group key distribution by a root node of the routing spanning tree according to information of the routing spanning tree, and transmitting layer by layer until all nodes on the routing spanning tree obtain the group key; according to the invention, the path cost of group key distribution is saved, so that the group key encryption communication cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of encrypted communication of quantum cryptography networks, and in particular relates to a centralized quantum cryptography network group key distribution method and system. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, quantum cryptography is developing rapidly. Quantum keys have received extensive attention due to their unique security characteristics, and are gradually becoming commercialized. The research on quantum key services is the key to promoting large-scale services for users of quantum keys. , so there are more and more related researches on quantum key services. [0004] From the current research status, according to the actual functional requirements, the quantum key service mode is generally divided into: single-ended random number key servic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/0852H04L9/0833H04L9/0836H04L9/08
Inventor 不公告发明人
Owner QUANTUMCTEK
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