Privacy protection controllable data management method based on block chain

Abstract

The invention relates to a privacy protection controllable data management method based on a block chain, and belongs to the technical field of sensitive data file modification management. The methodcomprises the following steps of encrypting and storing a user modification file in a cloud; voting the file modified by the user by a voting user and a trusted node with a negative voting right, andreceiving the modification of the file when the trusted node and the voting user exceeding a preset proportion lambda both accept the modification of the file; and storing all the file uploaded by theuser, the voting and vote counting behaviors of the user and the cloud file verification code in the block chain, and realizing the whole-course record of modifying the large private file by multipleusers in a cooperative manner by utilizing the non-repudiation characteristic of the block chain. Compared with the prior art, according to the method, the data management is safer, the privacy of the user and the rationality of file modification are ensured, and the collusion problem among the users is avoided; and by introducing the vote power of the trusted node (a function management department), the file management performance is obviously improved, and the user experience is also obviously improved.

Description

technical field [0001] The invention belongs to the technical field of modification management of sensitive data files, and in particular relates to a controllable data management method based on block chain privacy protection. Background technique [0002] In data management, for sensitive data and sensitive files, such as house design drawings, etc., users who participate in modifying these sensitive data and sensitive files need to pass identity authentication before they can modify the files. The modified files can be stored locally or on the cloud. . However, if participants modify files in this way, they may encounter illegal file modification or multi-party modification, and cannot find legal files that meet the requirements of most people. [0003] Based on the above problems, in the field of controllable data management, a solution called voting is proposed, and only documents passed through multi-party voting can become legal documents. However, voting parties ca...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing controllable data management method cannot provide users with the security problem when collaboratively editing large private files, and proposes a controllable data management method based on blockchain privacy protection, which can Realize the whole-process monitoring of users modifying large private files, and when the user finishes modifying large private files, realize the review of the records of users modifying large private files, so that users can better modify large private files

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