Key value data directional sharing method, device and system based on block chain technology and storage medium

Abstract

The invention discloses a key value data directional sharing method, device and system based on a block chain technology and a storage medium, and the method comprises the steps: encrypting a value value of a to-be-shared key value pair according to a preset encryption algorithm, and obtaining first encrypted data; then, acquiring an identity label and a public key of a to-be-shared object, and performing asymmetric encryption on the encryption key of the first encrypted data by using the public key of the to-be-shared object to obtain second encrypted data; and finally, storing the key value of the to-be-shared key value pair, the identity identifier of the to-be-shared object, the first encrypted data and the second encrypted data in a block chain network, and taking the key value of the key value pair and the identity identifier of the to-be-shared object as indexes for obtaining the first encrypted data and the second encrypted data from the block chain. Therefore, the encryption data can be obtained through the identity label of the to-be-shared object and the public key value, and decryption is performed through the private key of the to-be-shared object, so that directional sharing data is obtained.

Description

technical field [0001] The present invention relates to blockchain technology, in particular to a method, device, system and storage medium for directional sharing of key-value data based on blockchain technology. Background technique [0002] At present, the underlying platform of the blockchain generally adopts a "key-value pair" storage structure, which has the advantage of extremely high concurrent read and write performance. Since each keyword key in a key-value pair corresponds to a unique value value, at the same time, value can be a simple value or complex data composed of a set of key-value pairs. When querying, as long as the key value is known, the corresponding value value can be obtained, that is, once the key value is leaked or made public, the value value will inevitably be leaked or made public; although, the acquisition of the key value can be set at the business level permissions to reduce the risk of data leakage, but it cannot fundamentally solve the pro...

AI Technical Summary

Problems solved by technology

When querying, as long as the key value is known, the corresponding value value can be obtained, that is, once the key value is leaked or made public, the value value will inevitably be leaked or made public; although, the acquisition of the key value can be set at the business level permissions to reduce the risk of data leakage, but it cannot fundamentally solve the problem of data leakage risk. Therefore, it is necessary to design a blockchain-based key-value data directional sharing for the "key-value pair" storage structure. Designated User's Technical Solution

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