Blockchain-based data controlled flow method

Abstract

The invention discloses a blockchain-based controlled data transfer method, which belongs to the field of network security; firstly, a data transfer alliance chain is established in an untrustworthy network environment, and a trusted third party, data upload area and download area are set up; secondly Execute the smart contract for data encryption and upload, by setting the access control structure tree between different users, encrypt the transfer data and upload it to the data transfer center; Store the certificate on the chain; then execute the smart contract for key generation, and the trusted third party dynamically generates the resource access key according to the identity attribute of the data receiver; finally execute the smart contract obtained by decrypting the data, and the data receiver uses the resource access key Decrypt to obtain the plaintext of the transfer data, and verify the authenticity of the transfer data by comparing the on-chain and off-chain data digests. The invention ensures that the source of data is credible, and at the same time controls the range of data flow.

Description

technical field [0001] The invention belongs to the technical field of network security, and relates to a block chain-based data controlled flow method. Background technique [0002] With the continuous development of social informatization, various industries have gathered a large amount of data resources. These data are stored in different information systems independently of each other. The data flow between different systems is very difficult, resulting in industries falling into "data islands". predicament. [0003] The flow of data between different systems can promote the cross-reference of data in various industries, which is conducive to mining the potential value in the data, and brings huge social and economic benefits. Therefore, it is urgent to solve the problem of information barriers between industries. [0004] While the flow of data brings great convenience to people, it also faces the loss of personal data rights. For example, companies sell personal priv...

AI Technical Summary

Problems solved by technology

[0007] Based on the distributed database and the two-stage submission protocol in the prior art, the security problem in the data transfer process cannot be solved. The present invention proposes a controlled data transfer method based on blockchain, which effectively solves the problem of data credibility in an open network environment. problems such as low accuracy, chaotic data transfer process, and continuous loss of data rights and interests

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