Quantum key distribution method with superdense coding characteristic in quantum communication networks

Abstract

The invention belongs to the technical field of quantum communication networks, and discloses a quantum key distribution method with a superdense coding characteristic in a quantum communication network. The invention provides a quantum cryptography distribution protocol with practical use and high efficiency in the quantum communication network based on the correlation characteristics between theBell state particle entanglement characteristics and the pauli operation. An untrusted third party is introduced during communication parties establish communication, so complex operations such as the preparation and detangling of a quantum entangled state, reentanglement of a single-particle state, and the like are all accomplished by untrusted third party. Therefore the quantum key distributionfunction can be more safely and effectively completed by using the protocol. The quantum cryptography distribution protocol does not need to use a wavelength filter and a PNS device, and the key distribution process has low complexity. The quantum cryptography distribution protocol also has better noise tolerance performance under a collective noise channel than the QPQ protocol based on single photon due to the use of Bell state particle.

Description

technical field [0001] The invention belongs to the technical field of quantum communication networks, and in particular relates to a quantum key distribution method with dense coding characteristics in the quantum communication network. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The rapid development of quantum computers has made the classical cryptographic system based on mathematical computational complexity unable to meet the security needs of modern communications and networks. Scientists in the 20th century discovered a peculiar particle phenomenon in the microscopic world: entanglement and correlation, and quantum mechanics began to attract the attention of scholars from all walks of life. Based on Heisenberg's uncertainty principle, the non-cloning theorem and the entanglement correlation characteristics of quantum states in quantum mechanics, people began to establish the theoretical sy...

AI Technical Summary

Problems solved by technology

[0008] (3) The rapid development of quantum communication networks requires a large amount of quantum entanglement resources, and the preparation cost of quantum entanglement is still very expensive

However, the point-to-point communication method cannot meet the needs of multi-user network communication, or in a distributed network, multi-party users perform two-way and multi-way communication at the same time

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