Dynamic route architecture system for quantum cryptography network

Abstract

The invention discloses a dynamic route architecture system for a quantum cryptography network. The system performs dynamic route selection for cryptographic communication by the aid of quantum cryptography according to changes of quantum key quantities among relay nodes of the quantum cryptography network. Specifically, a route server is arranged for the relay nodes of the whole quantum cryptography network, and topology updating cycles of the quantum cryptography network are set; each relay node gathers and processes state information of each relay node and reports each result to the route server in each topology updating cycle. The route server generates topology state information of the quantum cryptography network in the next topology updating cycle after gathering the topology state information of all the relay nodes and sends the topology state information to all the relay nodes of the quantum cryptography network. Each relay node calculates and determines a target relay node as a next-hop route of communication data of any other relay node on the basis of a shortest path rule according to the topology state information of the quantum cryptography network acquired from the route server.

Description

[0001] This application is a divisional application with application date: January 7, 2013, application number: 2013100051051, and name of invention: a quantum cryptography network dynamic routing method application. technical field [0002] The invention relates to the communication field of a quantum cryptography network constructed by a quantum communication network and a classical communication network, in particular to a quantum cryptography network dynamic routing framework system. Background technique [0003] Quantum communication is a new interdisciplinary subject developed in the past two decades, and a new research field combining quantum theory and information theory. Recently, this subject has gradually moved from theory to experiment, and to practical development. Efficient and secure information transmission has attracted increasing attention. [0004] Physically, quantum communication can be understood as high-performance communication realized by using quan...

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Problems solved by technology

[0017] 3. The encryption mechanism of the quantum cryptography network needs to consume a large number of keys. Sometimes the key consumption speed is much faster than the generation speed. The path of the quantum cryptography network will be in an unusable state due to insufficient quantum keys at both ends of the path. Network, the path status of quantum cryptography network often changes frequently

[0020] Chinese Patent No. 201010144106.0 discloses "a quantum router for a multi-user optical quantum communication network and its routing method". Does not consider whether the amount of quantum keys on the communication path is sufficient

However, this patent solution has two disadvantages: first, the overall routing path selected by this patent solution may not be the shortest path; The encryption capability of a hop path with the lowest encryption capability is lower than that of another optional overall routing path, and the encryption capability of a path is often subject to the encryption capability of the hop path with the lowest encryption capability

[0021] The above patents related to quantum cryptography network routing do not provide a complete solution for dynamic routing of quantum cryptography networks, that is, how to transmit communication data from the initial node to the destination node through the selection of relay nodes according to the change of the topology state of the quantum cryptography network. Guaranteed communication security while consuming fewer quantum keys

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