A blockchain-based data link privacy calculation method

Abstract

The invention discloses a data link privacy calculation method based on a block chain. According to the method, a database sends data recording task information needing to be linked by a user to a block chain; and the block chain gives a reasonable threshold value of the similarity between the data records. Secondly, partitioning the public attribute information by each data source, and convertingthe public attribute value of each data source into a bit array of 0 or 1; and then calculating the ratio of each corresponding position among the bit arrays, and screening candidate successfully matched positions according to a dynamic threshold value given by the block chain. And finally, a safe and reliable unique participant is selected to execute a greedy inspection mechanism. And the blockchain calculates the similarity between the data source bit arrays by using a similarity calculation function and the security summation, so as to judge whether the bit arrays are from the same entity, i.e., whether the records are successfully matched or not. The privacy calculation and data protection in the data link based on the block chain are realized, and the data link is ensured to be successful under the condition of record matching.

Description

technical field [0001] The present invention relates to the technical field of block chains, in particular to a data link privacy calculation method based on block chains. Background technique [0002] The probability-based approximate matching method solves the problem of data record matching with quality problems, has good fault tolerance, and can improve the efficiency of data links, mine more accurate user information, and provide more efficient services. However, due to the application of cryptography technology, the existing privacy-preserving data link recording scheme has a large time cost, and its scalability is not suitable for real and huge real life. At the same time, when dealing with data with quality problems, the recall rate cannot be guaranteed. As a distributed database, the blockchain is jointly maintained by all nodes, which can solve the problem of third-party trust. However, the blockchain has the problem of privacy leakage due to the disclosure of per...

AI Technical Summary

Problems solved by technology

However, due to the application of cryptography technology, the existing privacy-preserving data link recording scheme has a large time cost, and its scalability is not suitable for real and huge real-life applications.

At the same time, when dealing with data with quality problems, the recall rate cannot be guaranteed

As a distributed database, the blockchain is jointly maintained by all nodes, which solves the problem of third-party trust. However, the blockchain has the problem of privacy leakage due to the disclosure of personal privacy data.