System and method for sharing confidential data on blockchain

Abstract

The invention discloses a system and a method for sharing confidential data on a blockchain. The system comprises a data encryption subsystem, a key distribution subsystem, a metadata directory subsystem, a key collection subsystem, a data decryption subsystem and a confidential data storage subsystem. The invention belongs to the technical field of blockchains. The invention relates to a system and a method for sharing confidential data on a blockchain. After the key is segmented, the key is stored on blockchain and is prevented from being lost, an innovative data use and supervision mechanism is provided; after the data provider encrypts the data, the key fragments are distributed to each holder, and each key fragment holder is a data stakeholder or a data supervision mechanism; when a user wants to win the encrypted data, the user needs to obtain approval of each holder; and, through the mechanism, it can be clearly recorded that the data is provided, supervised and used by who, andall historical records cannot be changed, and reasonable and legal exchange and use of the data in the digital economy era, business and personal data can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of block chain, and specifically refers to a system and method for sharing confidential data on the block chain. Background technique [0002] In the prior art, the confidential data stored on the blockchain is only encrypted with symmetric encryption or asymmetric encryption technology, and then stored on the blockchain. There are two problems in such a data security mechanism: the preservation of the key. We can separate the explanation by where the key is saved. Keep the key outside the blockchain: When we use encryption algorithms to store confidential data on the blockchain, we generally store the key in a private place outside the blockchain, but once the key Lost, our confidential data stored on the blockchain will become unreadable. If the key is stolen by a malicious third party, the data stored on the blockchain will be decrypted. Save the key on the blockchain: If we save the key on the blockc...

AI Technical Summary

Problems solved by technology

There are two problems with such a data confidentiality mechanism: the storage of the key

Assuming that the encryption key of the confidential data has been stolen, you only need to read the encrypted data through the block browser, and then decrypt it to obtain the confidential data. The whole process is not recorded, and it cannot be traced technically afterwards

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