A Quantum Key Distribution Method with Dense Encoding in Quantum Communication Networks
A quantum key distribution and quantum communication technology, applied in the field of quantum key distribution, can solve the problems of high cost of quantum entangled state preparation, inability to meet the needs of multi-user network communication, etc., and achieve the effect of good noise tolerance performance and low complexity
Active Publication Date: 2020-10-27
陕西翔创天科信息安全技术有限公司
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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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[0049] In the process of quantum state preparation and entanglement, an untrusted third-party UTP participation protocol is introduced; the first participant and the second participant follow the same encoding rules {I:00,X:01,Y:10,Z:11 } encodes the Pauli operator.
[0050] Specifically include:
[0051] 1) UTP prepares a string of Bell state particle sequences Then all the particles whose subscript is 1 are extracted to form a sequence P 1 , extract all the particles whose subscript is 2 to form a sequence P 2 ; Untrusted third-party UTP randomly in sequence P 1 and P 2 A sufficient amount of decoy particles are inserted into the eavesdropping detection, and the P 1 and P 2 Sent to the first party and the second party respectively;
[0052] 2) After the first participant and the second participant have received the particle sequence, they first check whether the particles in their hands are part of a pair of identical Bell state particles; after passing the detection,...
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The invention belongs to the technical field of quantum communication networks, and discloses a quantum key distribution method with dense coding characteristics in a quantum communication network. Based on the entanglement characteristics of Bell state particles and the correlation characteristics of Pauli operations, the invention proposes a quantum key distribution method in a quantum communication network. It is a practical and efficient quantum cryptography distribution protocol. In the process of establishing communication between the two parties, due to the introduction of an untrusted third party, complex operations such as the preparation and disentanglement of the quantum entangled state and the re-entanglement of the single particle state are all completed by the untrusted third party. Therefore, using this protocol can complete the quantum key distribution function more safely and effectively. This protocol does not need to use wavelength filters and PNS devices, and the complexity of the key distribution process is low. Due to the use of Bell state particles, this protocol also has better noise tolerance performance in the collective noise channel than the QPQ protocol based on single photons.
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...
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IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0855
Inventor 张仕斌郑涛
Owner 陕西翔创天科信息安全技术有限公司