A method for realizing distributed storage of files based on blockchain

Abstract

The invention discloses a method for realizing distributed storage of files based on blockchain, comprising: the uploader divides the stored file into multiple file fragments, and calculates and obtains the total hash value corresponding to the stored file and the file fragment corresponding slice hash value, and generate a file table containing the total hash value, file fragment attributes, fragment hash values, and uploader attributes; the uploader signs a smart contract with the central node of the private chain, and uploads the file form, and the central node will sign The news of the smart contract is published to the private chain; the central node searches the alliance chain according to the file table, selects the member of the shard storage alliance and the backup node of the shard storage, and makes the file storage table and the private chain signature, and then uploads the file storage table and the private chain signature are sent to the uploader; the uploader transmits the file fragments point-to-point to the alliance members according to the received file storage table and private chain signature according to the file storage table, so as to realize the distributed storage of files.

Description

technical field [0001] The invention belongs to the field of file storage, and in particular relates to a method for realizing distributed storage of files based on a block chain. Background technique [0002] With the rapid development of the Internet, data files have also ushered in explosive growth, and users are becoming more and more concerned about the storage security of files. There are two main problems facing us, one is the problem of local storage capacity, and the other is The problem is the insecurity of storage on third-party servers. In the existing technology, there are two types of file storage solutions: centralized storage and decentralized storage. At present, centralized storage solutions include various third-party network disks or cloud disks. Such as Tencent Weiyun, Huayun Cloud Disk, Baidu Cloud Disk, Google Cloud, etc., the more famous decentralized storage solutions are storj and Sia. With a centralized storage solution, these large storage provid...

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Problems solved by technology

[0004] Therefore, on this basis, this paper proposes a blockchain-based distributed file system method, which can solve the above two problems, segment the user's file data, and store each segment and its copy discretely in the area. In the storage nodes of the block chain, if you want to obtain the complete file, you need to reach a consensus on the storage nodes that contain the file to form a fragment. For the attacker, the cost is much greater than the purchase cost.

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