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Quantum and classical integrated communication network system and key distribution method thereof

A technology of quantum key and communication network, applied in the field of quantum information technology and classical optical fiber communication fusion, to achieve the effect of flexible system, clear function and convenient system

Active Publication Date: 2019-04-19
NAT QUANTUM COMM GUANGDONG CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a quantum and classical fusion communication network system that solves the coexistence problem of quantum signals and classical signals

Method used

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  • Quantum and classical integrated communication network system and key distribution method thereof
  • Quantum and classical integrated communication network system and key distribution method thereof
  • Quantum and classical integrated communication network system and key distribution method thereof

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Embodiment 1

[0033] Such as Figure 1-5 As shown, the quantum and classical fusion communication network system includes a quantum layer module, a key management layer module, and an application layer module, among which

[0034] The quantum layer mainly includes QKD① for generating quantum keys, and a series of classic operations such as original code exchange, screening, and key extraction after the platform generates keys. Using wavelength division multiplexing (WDM) devices, it will access the classic The quantum signal (1310nm) of the physical link layer of the communication network is multiplexed to the same optical fiber at a transmission rate of 2Gb / s and the classical signal (1550nm) at a rate of 10Gb / s or higher in Ethernet for transmission;

[0035] The plug-and-play QKD that further generates quantum keys includes lasers, circulators, couplers, unbalanced interferometers, fiber delay lines, two phase modulators, polarization beam splitters, variable optical attenuators, and pul...

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Abstract

The invention provides a quantum and classical integrated communication network system and a key distribution method thereof. The system adopts a three-layer mechanism, from the quantum key generationof a quantum layer to the storage and forwarding of a key management layer, and terminal application of an application layer, the functionality of each layer is clear, and the more appropriate QKD can be selected according to the application layer quantum group terminal, the communication distance, the key rate and like requirements; an engineering modularization system is more flexible and convenient to facilitate the industry standardization and the large-scale market application; the key distribution method provided by the invention adopts a dynamic distribution technology, namely, the request-distribution online distribution technology, a session mechanism is established according to a request and key distribution center of the terminal, and the key distribution can be efficiently accomplished in real time.

Description

technical field [0001] The present invention relates to the fusion field of quantum information technology and classical optical fiber communication, and more specifically, relates to a quantum and classical fusion communication network system and a key distribution method thereof. Background technique [0002] Quantum key distribution is a highly secure quantum cryptography technology using quantum effects. It is an emerging science combining quantum mechanics and classical cryptography. It is currently a research hotspot in international quantum physics and information science. [0003] Quantum classical fusion communication is the trend of quantum key distribution network application. Since Bennett and Brassard's first paper on QKD in 1984, in 1994 Townsend et al. used an optical power splitter to construct a multi-user quantum key distribution network structure based on a passive optical network, realizing multi-user quantum communication. In 2003, Brassard proposed a f...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04B10/70H04J14/02
CPCH04B10/70H04J14/0227H04L9/083H04L9/0838H04L9/0852H04L9/0858
Inventor 郭邦红冉攀胡敏张立涛曾涵宇何翼龙曾炎颖
Owner NAT QUANTUM COMM GUANGDONG CO LTD
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