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Multiparty private comparison method based on quantum mechanism

A multi-party and mechanism technology, applied in the field of information security, can solve problems such as low efficiency

Inactive Publication Date: 2013-05-22
四川星至科技有限公司
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Problems solved by technology

It is true that we can use the QPC of both parties for multi-party private information comparison applications. Assuming n participants, a multi-party comparison needs to be performed (n-1)~n(n-1) / 2 times, which is obviously very inefficient

Method used

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  • Multiparty private comparison method based on quantum mechanism
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  • Multiparty private comparison method based on quantum mechanism

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Embodiment Construction

[0037] A quantum mechanism-based multi-party private comparison method proposed by the present invention will be described in detail below in conjunction with the accompanying drawings:

[0038] The main technical steps of the implementation of a quantum mechanism-based multi-party private comparison method of the present invention are as follows: figure 1 As shown, the specific steps are as follows:

[0039] (i) TP random from GHZ-like state | φ > 12 . . . N = 1 2 ( | q 1 , q 2 , . . . , q N > + | ...

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Abstract

The invention provides a multiparty private comparison method based on a quantum mechanism. Multiparty private information is encoded into quantum state through quantum super-dense coding, and accordingly whether multiparty private information is consistent or not can be judged by one comparison, and private comparison efficiency is improved. Compared with multiparty application based on two-party quantum private comparison in the prior art, the method is higher in efficiency, namely whether multiparty private information is consistent or not can be judged by one comparison. In the mean time, the method is better in safety, private information of participants cannot be learned by eavesdroppers and third parties, and the participants cannot learn private information of other parties.

Description

technical field [0001] The invention belongs to the technical field of information security, and specifically refers to a multi-party private comparison method based on a quantum mechanism. Background technique [0002] Secure Multi-Party Computation (SMC) is a basic problem in the study of distributed computing, which means that in a multi-user network that does not trust each other, each user can cooperate without revealing their private input information to obtain a certain The result of the function calculation. Secure multi-party computing has broad application prospects in financial, military, political, medical and other fields, and plays an important role in scenarios such as electronic elections, electronic voting, electronic auctions, secret sharing, and threshold signatures. At present, the SMC problem has been widely studied in the field of classical computing, and its security is based on the assumption of computational complexity. However, with the improvemen...

Claims

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Application Information

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IPC IPC(8): H04L9/08
Inventor 刘文杰刘超邢国稳
Owner 四川星至科技有限公司
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