Quantum key channel transmission method and system based on optical time division multiplexing

Abstract

The invention provides a quantum key channel transmission method and system based on optical time division multiplexing. The method comprises steps of S1, based on the wavelength division multiplexing mechanism, allocating a wavelength resource for the data service to obtain the data channel, and allocating a wavelength resource for the quantum key to obtain the quantum key channel and the measuring base channel; S2, based on the data channel, allocating a data channel resource for one data service and transmitting the data service; S3, based on the quantum key channel, transmitting the quantum key related to the data service by the optical time division multiplexing mode; and S4, based on the measuring base channel, transmitting measurement base information related to the quantum key by the optical time division multiplexing mode. The invention utilizes the optical time division multiplexing technology to segment the optical network wavelength resources to realize the dynamic construction of the quantum key channel and ensure that the optical network can realize the efficient quantum key distribution and that the real-time and efficient use of the whole network resources is achieved under the premise that the resources are limited and the security of the data service is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a quantum key channel transmission method and system based on optical time division multiplexing. Background technique [0002] At present, the explosive growth of Internet data has stimulated the rapid development of global communication services, and there has been an "infinite thirst" for communication resources; at the same time, information networks are facing increasingly severe security threats. As the underlying facility, the current optical network carries a huge amount of information and faces the risk of being eavesdropped. The Quantum Key Distribution (QKD) mechanism can provide reliable keys for end-to-end communication for encryption. On the one hand, the optical network needs the quantum key distribution mechanism to provide it with the encryption key required for communication; on the other hand, the establishment of the quantum key channel ...

AI Technical Summary

Problems solved by technology

However, the current technology is difficult to match the security requirements of high-traffic data services in optical networks, and wavelength resources are seriously insufficient

[0004] In the current commercial wavelength division multiplexing (WDM) optical network, 40 or 80 C wavelengths can be used for communication in one optical fiber. Allocating too many wavelengths for quantum key channels will greatly affect the transmission of data services. Moreover, the establishment cost of QKD channels is relatively high; especially when there are many data service requests, if sufficient quantum key channels cannot be established, sufficient quantum key resources cannot be provided, and without sufficient quantum key resources, data service security cannot be satisfied. needs

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