Data comparison method, device, equipment and medium for privacy data
A data comparison and privacy data technology, applied in the field of data processing, can solve the problems of low efficiency, large data communication volume, high computational complexity of homomorphic encryption technology, and achieve the effect of ensuring data privacy
Active Publication Date: 2022-01-21
HANGZHOU QULIAN TECH CO LTD
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Problems solved by technology
[0005] In the process of realizing the present invention, the inventors found that there are at least the following problems in the existing privacy computing: the schemes for realizing privacy comparison based on multi-party secure computing are mainly divided into two categories based on homomorphic encryption and based on inadvertent transmission. Due to the high computational complexity of the homomorphic encryption technology itself, the overall efficiency is relatively low; the efficiency of the scheme using inadvertent transmission will be greatly improved compared with the homomorphic encryption scheme, but the data communication in the comparison The amount is large, and some schemes only support the comparison of positive integers. The comparison of decimals and negative numbers needs to be converted into positive integers before comparison
It can be seen that the existing privacy comparison method has the problem of low efficiency.
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[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein in the description of the application are only to describe specific embodiments The purpose is not to limit the present application; the terms "comprising" and "having" and any variations thereof in the specification and claims of the present application and the description of the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific order.
[0099] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrenc...
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The invention discloses a data comparison method, device, equipment and medium for privacy data, including: the initiator divides the initiator data to obtain first data and second data, sends the second data to the participant, and participates in The party randomly generates a positive integer, and divides the data of the participant to obtain the third data and the fourth data, and divides the positive integer to obtain the first parameter and the second parameter. The participant based on the second data, the fourth data The data and the second parameter are used to perform secret addition and multiplication operations with the initiator respectively in the way of additive secret sharing to obtain the first operation result. The initiator uses the method of additive secret sharing based on the first data, the third data and the first parameter Perform secret addition and multiplication operations with the participating parties to obtain the second operation result, and the initiator performs restoration and comparison processing on the first operation result and the second operation result to obtain the comparison result, and the security of privacy data comparison can be improved by adopting the present invention.
Description
technical field [0001] The invention relates to the field of data processing, in particular to a data comparison method, device, equipment and medium for private data. Background technique [0002] Today, when the importance of data is becoming increasingly prominent, playing its role while protecting user data privacy is an important prerequisite for the country to coordinate data resources. Institutions and individuals are becoming more and more sensitive to data privacy. How to share the value of data on the premise of ensuring privacy has become the most concerned issue, such as safe auctions, safe elections, and comparison of private data. If it cannot be solved, then The data will become personal collections, deposited in the local database of each institution or individual, and cannot exert its due value, and the multi-party secure computing technology is an important technology to solve this problem. [0003] Multi-party secure computing (MPC: Secure Muti-Party Comp...
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IPC IPC(8): H04L9/08
CPCH04L9/085H04L9/0869H04L2209/46
Inventor 匡立中邱炜伟汪小益刘敬郭颂
Owner HANGZHOU QULIAN TECH CO LTD