Block chain data transaction method with privacy protection

Abstract

The invention provides a block chain data transaction method with privacy protection, and relates to the technical field of block chains. The seller user participates in the transaction and stores original data into an interstellar file system after performing public key inner product encryption on the original data, and initiates a transaction request for creating a seller smart contract in a block chain; then the buyer user initiates a transaction request for creating a buyer smart contract in the block chain; the consensus nodes on the block chain perform validity check on the transaction requests initiated by the transaction participating users; if the check is passed, all the consensus nodes on the block chain record the transaction requests in the chain, and the seller user and the buyer user perform data transaction based on the block chain; and if the check is invalid, the transaction application is rejected. The method is based on the block chain, the traceability of the data transaction process is guaranteed, and the rights and interests of buyers and sellers are guaranteed. Meanwhile, the data transaction process is encrypted by using a secret key, so that the transaction platform is ensured not to check and store easy-to-check data.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a block chain data transaction method with privacy protection. Background technique [0002] During the four years from 2011 to 2014, my country's big data was in the initial stage of development, and the growth rate of the market size of big data was stable, maintaining above 20% every year. In 2015, the size of the big data market reached 9.89 billion yuan, a year-on-year increase of 30.7%. In 2016, the growth rate of the big data market scale reached a climax, reaching 45%, and the market scale continued to expand, exceeding 16 billion yuan. It is expected that in the next ten years, the growth rate of the big data market will be stable. [0003] With the steady development of the big data market, data-driven intelligent applications are becoming more and more popular, and the value of data itself is becoming more and more obvious. For data analysis companies and big da...

AI Technical Summary

Problems solved by technology

[0008] The data transaction system based on the blockchain solves the problem of the three-party transaction platform, guarantees the security and tamper-proof modification during the data transaction process, but the data information of the final transaction is completely exposed, and the data buyer can copy the seller's data at low cost and carry out Secondary resale damages the rights and interests of data sellers and infringes on the privacy of data sellers

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