Distributed data storage system and method based on blockchain

Abstract

The invention discloses a distributed data storage system and method based on a blockchain. The method comprises: inputting a data content into a data storage module by a data inputting module, and using a hash algorithm to calculate an extract of the data content to store on the blockchain; receiving the data content by the data storage module, retrieving the extract corresponding to the data content, and storing the data content that is consistent with the extract; and when data querying is carried out, finding a stored queried data content by the data storage module, retrieving an extract corresponding to the data content, and returning the queried data content that is consistent with the corresponding extract to a querying node. According to the system and method, the blockchain is used in the information storage system, a Root-privilege administrator does not exist, no one can arbitrarily modify an information content without being detected, and reliable management and secure sharing of information are realized; and the blockchain is not directly used to store the data content, only the extract obtained by calculating by using the hash algorithm is stored, the amount of storage on the blockchain is reduced, low efficiency of the blockchain is avoided, and the practicality is improved.

Description

Technical field [0001] The present invention relates to the field of computer application technology, in particular to a distributed data storage system and method based on blockchain. Background technique [0002] With the rapid development of network and computer technology, electronic information for governments, banks, and enterprises has become the foundation of office work, and this information is stored in databases. Generally, the database has a database administrator with root authority, who can delete and change data. Hackers or malicious administrators who have stolen Root permissions can maliciously modify or delete data in the database. All data will no longer be authentic and credible, which greatly endangers the security of the information information system. [0003] Blockchain is a kind of chained data structure that combines data blocks in sequence in chronological order, and uses cryptographic methods to associate distributed data of data blocks; block chain tec...

AI Technical Summary

Problems solved by technology

However, the blockchain technology itself comes from digital currency (Bitcoin), and what is usually stored on the blockchain is only currency transaction records. The data format is uniform and the amount of data that can be stored is small; Huge, if these data are directly stored on the blockchain, the process of using the data will become very difficult; in addition, in the blockchain system, most nodes need to store the complete blockchain. From the perspective of the entire network, the data Too many backups, a serious waste of resources

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