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Distributed quantum cryptography network group key distribution method and system

A quantum cryptography and group key technology, applied in the field of distributed quantum cryptography network group key distribution method and system, can solve the problem of not considering the group key distribution path cost, increase the group key distribution path cost, and increase the group key distribution path cost. Key encryption communication costs and other issues, to achieve the effect of reducing group key encryption communication costs, saving path costs, and reducing dependencies

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

The group key is relayed between quantum cryptography network nodes. The longer the distance of the relay path, the greater the cost of generating the relay key. As far as the inventor knows, the current research literature is mostly realized through key agreement optimization. The speed and security of key distribution, but this optimization method does not consider the path cost of group key distribution, and does not use the best path for group key distribution, which increases the path cost of group key distribution, thereby increasing Cost of Group Key Encrypted Communications

Method used

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  • Distributed quantum cryptography network group key distribution method and system
  • Distributed quantum cryptography network group key distribution method and system

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Embodiment 1

[0041] A distributed quantum cryptography network group key distribution method is executed from the quantum cryptography network node where group members participating in group communication are located, hereinafter referred to as the group node side.

[0042] This embodiment intends to construct the shortest or shorter total path by sequentially determining the best selection path between each node, so as to ensure that the least or less group keys are distributed on the basis of completing the distribution of all group keys. path cost.

[0043] Include the following steps:

[0044] Obtain the routing graph of the quantum cryptography network for the current routing period;

[0045] Obtain information about whether there is a group node newly joining or exiting group communication, and if so, update the routing graph of the quantum cryptography network according to the content of the information;

[0046] According to the updated routing map, with the purpose that the tota...

Embodiment 2

[0075] A distributed quantum cryptography network group key distribution system, such as figure 1 As shown, the entire system includes a group communication authentication server and group nodes participating in group communication. The group communication authentication server is responsible for the registration, login authentication, and exit management of the group members participating in the group communication, as well as sending the quantum cryptography network node ID of the group members who join or leave the group communication to each group node in each routing cycle. In each routing period, the group node calculates the routing spanning tree for group key distribution in the next routing period according to the routing graph of the quantum cryptographic network. If the group nodes participating in group communication in a routing cycle do not change, the group nodes do not need to recalculate the routing spanning tree.

[0076] When the group communication starts,...

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Abstract

The invention provides a distributed quantum cryptography network group key distribution method and system. The method comprises the following steps: acquiring a routing graph of a quantum cryptography network in a current routing period; acquiring whether information that the group node newly joins in or quits group communication exists, and if so, updating a routing graph of the quantum cryptography network according to information content; according to the updated routing graph, forming a routing spanning tree of group key distribution of the next routing period layer by layer with the purpose that the total path of group key distribution is smaller than a set threshold value; and generating a group key or receiving a group key distributed by an upper-layer node according to the position of the upper-layer node in the routing spanning tree, storing the group key, and issuing the group key to a next-layer node. According to the invention, the nodes are arranged in a distributed manner, and the shortest or shorter total path is constructed, so that the minimum or less path cost of group key distribution is ensured on the basis of completing the distribution of all group keys.

Description

technical field [0001] The invention belongs to the technical field of encrypted communication of quantum cryptography networks, and in particular relates to a distributed 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] With the rapid development of quantum cryptography, quantum keys have received extensive attention due to their unique security characteristics, and are gradually becoming commercialized. As one of the quantum communication service modes, the group key service mode has been paid more and more attention by researchers; the group key service mode is used to serve the communication between applications involving multiple parties in the quantum communication networking environment, such as video conferencing, network Games, video on demand, etc. [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L45/48H04L45/12H04L45/44H04L9/40
CPCH04L9/0819H04L45/48H04L45/12H04L45/44H04L45/26H04L63/0876H04L63/00H04L9/08
Inventor 不公告发明人
Owner QUANTUMCTEK
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