End-to-end key generation method based on dynamic adjustment in quantum metropolitan area network

Abstract

The invention discloses an end-to-end secret key generation method based on dynamic adjustment in a quantum metropolitan area network, which dynamically adjusts the establishment speed of an end-to-end secret key according to the residual secret key quantity, ensures normal communication and does not waste excessive network resources. The implementation scheme is as follows: negotiating a quantum key between adjacent trusted relays in a quantum metropolitan area network, initializing key related parameters to generate a random initial key, and packaging the random initial key; encrypting the transport key setup packet using the negotiated quantum key to generate a symmetric end-to-end key; when the end-to-end secret key amount is accumulated to a threshold value, communication is started, secret key establishment and service transmission are independently carried out in the communication process, and the packet sending interval and the secret key expansion coefficient of a secret key establishment packet are dynamically adjusted; and calculating the next predicted packet sending time after each packet sending, and when the service end time is exceeded, sending an information packet by the current end to notify the opposite side to end communication. The communication delay and jitter in the quantum communication network are reduced, and the method can be used for the quantum metropolitan area network.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to an end-to-end key generation method, which can be used for quantum secure communication in a quantum metropolitan area network. Background technique [0002] Quantum key distribution QKD uses quantum states to quantum encode and transmit information, so as to negotiate a theoretically unconditionally secure shared key between trusted relays. Its security depends on the basic principles of quantum mechanics. Once there is a third party Steal the key and it will be discovered. [0003] In recent years, simple point-to-point quantum key distribution technology has become increasingly mature, and quantum key distribution networks have gradually become the focus of research. In the existing quantum metropolitan area network networking methods, the QKD network based on trusted relay is considered to be a practical network networking method under the current technical condi...

AI Technical Summary

Problems solved by technology

However, this method only generates an initial key at the source for subsequent end-to-end key generation, and the end-to-end key generation rate cannot be adjusted according to the specific circumstances of the business during the communication process.

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