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Measurement-retransmission semi-quantum private comparison method without entanglement

A quantum and privacy technology, applied in the field of quantum cryptography

Active Publication Date: 2018-09-28
嘉兴市顺凯鹿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the SQPC method in [77] needs to use quantum entanglement exchange

Method used

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  • Measurement-retransmission semi-quantum private comparison method without entanglement
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  • Measurement-retransmission semi-quantum private comparison method without entanglement

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Embodiment

[0212] 1 Application example of semi-quantum privacy comparison method

[0213] here to and The method of the present invention is illustrated by way of example. Without loss of generality, suppose Announced by Bob(Charlie) s position. Bob(Charlie) calculates get Then, Bob (Charlie) announces to TP After hearing Bob and Charlie's announcement, TP calculates get if R i ≠0, TP will yield X≠Y. Otherwise, he will set i=i+1 and continue the comparison. If he finally finds R i =0 holds for all i, he will conclude that X=Y. Finally, TP tells Bob and Charlie the comparison result of X and Y.

[0214] 2 discussions

[0215]Here we further compare the method of the present invention with the SQPC method of literature [77-78] in detail. The comparison results are listed in Table 3. According to Table 3, it is obvious that the method of the present invention outperforms the SQPC method of literature [77-78] in the initial preparation of quantum resources and qu...

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Abstract

The invention provides a measurement-retransmission semi-quantum private comparison method without entanglement, which uses the product state of two particles as an initial quantum preparation resource. Two classical users can achieve their secret equality comparison with the help of a quantum third party, and the quantum third party is semi-loyal, which means that the quantum third party is allowed to act wrongly according to the own will but cannot collude with the users. According to the scheme of the invention, the output correctness and the security performance against external attacks and participant attacks can be guaranteed. Compared with the previous semi-quantum private comparison method, the method of the invention has the advantages that only the product state of two particlesis used as the initial quantum preparation resource, only the third party is required to perform single photon measurement, and quantum entanglement swapping is not required. The method of the invention can be realized by an existing quantum technology.

Description

technical field [0001] The invention relates to the field of quantum cryptography. The present invention designs a measurement-retransmission semi-quantum privacy comparison method without entanglement, and realizes the equality comparison of two classical user secrets with the help of a quantum third party (TP). Background technique [0002] As we all know, quantum cryptography is an important application of quantum mechanics in the field of cryptography. Unlike classical cryptography, quantum cryptography can theoretically achieve unconditional security by using the laws of quantum mechanics. So far, many interesting and useful branches have been born from quantum cryptography, such as quantum key distribution (Quantum key distribution, QKD) [1-5], quantum secure direct communication (Quantum secure direct communication, QSDC) [6-13] , Quantum secret sharing (Quantumsecret sharing, QSS) [14-18], etc. [0003] Secure multi-user computation (SMC) is an important topic in ...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04B10/70H04L9/00
CPCH04B10/70H04L9/002H04L9/0852
Inventor 叶天语叶崇强
Owner 嘉兴市顺凯鹿科技有限公司
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