Data encryption evidence storage and sharing method based on blockchain

Abstract

The invention discloses a data encryption evidence storage and sharing method based on a blockchain, and belongs to the field of blockchain technology application, and the method comprises the following steps: distributing a public and private key pair to a user; enabling the system to generate random numbers dividing and storing the random numbers, and uploading the user encrypted data to the storage system; during data sharing, enabling the data requester to agree with and verify the establishment of a transaction through the owning party; enabling the data requester to download encrypted data to the local, obtaining the secret share of the data owner, then reaching a consensus with the node on the chain, synthesizing a random number, and processing the random number into a secret key; and enabling the data requester to decrypt the data by using the key. According to the method, the data is encrypted and stored, and the encryption key is segmented and stored, so that the data storage security is ensured, and the data and information and trace storage evidence during data sharing are recorded by using the non-tampering characteristic of the blockchain, and the data sharing security controllability is enhanced.

Description

technical field [0001] The invention relates to data encryption certificate storage and sharing, in particular to a block chain-based data encryption certificate storage and sharing method. Background technique [0002] With the rapid development of network applications and the advent of the digital age, data sharing is the general trend, but traditional data sharing participants are reluctant to share data. The main reasons are the following difficulties: [0003] It is difficult to verify data rights. Data is easily copied in the process of sharing and circulation. If the rights of data cannot be confirmed, and electronic evidence with clear data producers, users, and managers will not be able to achieve accurate authorization of data, it will hinder the sharing and circulation of data. [0004] Data security is difficult to guarantee. Traditional electronic data and data evidence are stored in self-owned servers or cloud servers, and data evidence is easily damaged du...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing cloud storage technology stores data in plain text or the data user privacy of which the storage party has a complete data encryption and decryption key may be obtained by the storage party although encrypted storage is performed, and the owner information of the data cannot be obtained. Evidence records, the key may be leaked when data is shared, and the data and evidence are at risk of attack and tampering during the process of being transmitted to the cloud server

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