A method and system for anonymous sharing of supervised data based on blockchain

Abstract

The invention discloses a method and system for anonymously sharing supervisable data based on block chain. The method includes: when a data using node initiates a data sharing request to a data owning node, the data owning node uses its own private key and the The data uses the node public key to generate a re-encryption key, and sends the re-encryption key to the proxy server; the proxy server owns the random key used by the node to pre-encrypt the plaintext data and the The data ciphertext is stored in the location of the cloud server, encrypted according to the public key of the data owning node, and then re-encrypted and converted as ciphertext, and sent to the data-using node; the data-using node decrypts through its own private key to obtain the data to be shared The encryption key and its storage location in the cloud database, extract the corresponding location data in the cloud database and decrypt it according to the encryption key to obtain the data to be shared.

Description

Technical field [0001] The present invention relates to the field of information technology, and more particularly to a regulatible data anonymous sharing method and system based on a block chain. Background technique [0002] The block chain technology breaks the centralized characteristics of the traditional Internet, making the trust crisis that plagues the modern economy is resolved to some extent. An important feature of the block chain is that the data is transparent, and the data stored on the block chain is visible for any node on the chain, although this guarantees that any behavior attempting to tamper data will be recorded and discovered, but This also seriously affects the privacy of the data. Some use scenarios, users do not want their own data to be viewed at any time, such as commercial or government, some confidential data in the government, company, etc. need to be strictly confidential, only to delegate the decryption rights of data in a specific scene. Specific...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing block chain technology existing in the background technology in the field of business or government affairs, the data requires both privacy sharing and hierarchical supervision. The present invention provides a block chain-based anonymous data sharing method that can be supervised And the system, the method and the system use the proxy re-encryption algorithm to convert the ciphertext from the encryption of the public key of the data owner node to the encryption of the public key of the data receiver without disclosing the private key and plaintext of the data owner node so as to realize data privacy sharing ; Use the hierarchical attributes of the tree-shaped key distribution mechanism to solve the hierarchical supervision requirements of data on the chain

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