Quantum privacy comparison method and system based on unidirectional quantum walking and storage medium

A quantum walk, one-way technology, applied in the field of quantum cryptography, to achieve the effect of improving security and efficiency

Active Publication Date: 2022-07-05
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of this, the present invention provides a quantum privacy comparison method and

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  • Quantum privacy comparison method and system based on unidirectional quantum walking and storage medium
  • Quantum privacy comparison method and system based on unidirectional quantum walking and storage medium
  • Quantum privacy comparison method and system based on unidirectional quantum walking and storage medium

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Embodiment Construction

[0053] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the embodiments and accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0054] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related structures and / or processing steps are omitted. Other details not relevant to the present invention.

[0055] It should be emphasized that the term "comprising / comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more ot...

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Abstract

The invention provides a quantum privacy comparison method and system based on one-way quantum walking and a storage medium, and in the method, a semi-honest third party assists two non-trusted participants to complete comparison. When a particle sequence is transmitted between the two parties, decoy particles are inserted to detect whether a listener exists or not, a positive evolution operator and an inverse evolution operator are used for encryption, private information of a participant is coded, and QWs state measurement is carried out on the final particle sequence to obtain a measurement result. And comparing the size of the first privacy information of the first participant with the size of the second privacy information of the second participant based on the measurement result of the walking state in the measurement results. According to the method, the safety and the efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of quantum cryptography, in particular to a quantum privacy comparison method, system and storage medium based on single-vector quantum walk. Background technique [0002] In 1982 Yao posed the famous millionaire question. It refers to two millionaires who want to compare who is richer, but do not want to reveal their wealth. Secure Multi-Party Computation (SMPC) came into being on this basis, which can be used in many aspects such as secret sharing, electronic election and so on. [0003] With the rapid development of quantum technology, quantum parallelism brings great challenges to traditional cryptography, and also makes traditional secure multi-party computing protocols have serious security risks. Therefore, researchers turned their attention to the design of quantum-safe multi-party computing protocols. So far, many protocols have been proposed, such as quantum privacy comparison (QPC) protocol, qu...

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Application Information

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IPC IPC(8): H04L9/08H04L9/40
CPCH04L9/0852H04L63/0428
Inventor 窦钊王莒杰张花丽陈秀波李剑赖裕平
Owner BEIJING UNIV OF POSTS & TELECOMM
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