Block chain-based trusted data safe storage method, retrieval method and equipment

Abstract

The invention provides a block chain-based trusted data safety storage method, retrieval method and equipment, and the storage method comprises the steps: obtaining surrounding environment information to determine a user scene safety level; obtaining a user permission level and a protection level requirement of the user on the to-be-uploaded data; integrating the scene safety level, the authority level and the protection level requirement to obtain a final protection level of the to-be-uploaded data; obtaining the size of to-be-uploaded data, and extracting keywords; if the size is large, storing the to-be-uploaded data under the chain and collecting a corresponding under-chain storage address; if the size is small, determining the storage mode of the to-be-uploaded data as on-chain storage; and according to the final protection level, packaging the data-related information and the keyword, or encrypting the data-related information and then packaging the data-related information with the keyword information, or encrypting the data-related information and packaging the data-related information after homomorphic encryption of the keyword information, and uploading the packaged data to the block chain. According to the scheme, personalized requirements can be provided for users.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a secure storage method, retrieval method and equipment for trusted data based on block chains. Background technique [0002] Data in traditional data management storage usually includes structured data such as metadata in databases, user information, and user operation records, as well as unstructured data such as pictures, audio, and documents in data file systems. For traditional distributed file systems, such as GFS, HDFS, GPFS, etc., although the efficiency of data storage has been improved, they still have not got rid of the centralized structure and management mode, and there are problems such as transaction inconsistency and data insecurity. [0003] With its characteristics of decentralization and non-tampering, the blockchain can be used as a machine that leads trust. By using hash algorithms, digital signatures, time stamps, distributed consensus, and economic inc...

AI Technical Summary

Problems solved by technology

In terms of data encryption transmission mechanism, common data encryption algorithms such as MD5 algorithm and SHA1 algorithm are mainly used to encrypt data to realize secure transmission. However, for algorithms such as MD5, the stored encrypted data is generally irreversible. Resulting in inaccessibility to stored encrypted data

At the same time, for users who have performed group management, the data level has been determined, which leads to users being unable to meet the user's data storage requirements in special scenarios, increasing cumbersome processes, and reducing work efficiency

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