Digital asset evidence storage system based on blockchain

Abstract

The invention provides a digital asset evidence storage method based on a blockchain. The method comprises the following steps: enabling a user to verify a node and log in; encrypting the original file; selecting nodes which are active and have few times of going wrong in the IPFS system as evidence storage nodes; distributing file fragments to the selected evidence storage node, and returning a corresponding Hash value by the IPFS system; calling an intelligent contract, and storing metadata of the file and fingerprint data obtained by performing Hash function calculation after encryption into a blockchain; screening out a main node for accounting through a PoA consensus algorithm, wherein the main node is responsible for generating blocks and packaging transaction data, and then broadcasting and synchronizing; and when authentication is needed, authorizing the authentication mechanism to access the original file and historical data stored in the blockchain, and verifying whether thedata is modified or not. According to the evidence storage method, the evidence storage file is stored based on the blockchain by utilizing the blockchain technology, meanwhile, bloating of the blockchain is avoided, the confidentiality of the uploaded file is guaranteed, and evidence collection is easier and more direct.

Description

technical field [0001] The present invention relates to a certificate storage technology, in particular to a blockchain-based digital asset certificate deposit method and a certificate deposit system. Background technique [0002] In recent years, copyright disputes, data theft, malicious tampering and other incidents have caused great troubles to enterprises. The reason is inseparable from the weak awareness of evidence preservation. Ordinary certificate deposits only store digital assets in a centralized server in the form of backups. This method has disadvantages such as fewer certificate depository institutions, weak tamper-proof capabilities, and low evidence effectiveness. According to the law, a single or partial electronic evidence is far from being able to support the judgment of the entire case, so a new way of depositing evidence is urgently needed to break the traditional barriers. [0003] The blockchain-based digital asset storage system provides an idea to so...

AI Technical Summary

Problems solved by technology

[0004] However, the current certificate storage scheme has disadvantages. For example, the method of depositing certificates with the help of HTTP centralized servers relies on blockchain technology, but the server still has the possibility of crashing in terms of performance, network speed and security; If the file involves privacy, directly broadcasting to the blockchain will easily lead to privacy leakage; the third-party authentication agency is not on the blockchain, and the trust in the blockchain as a whole is not high.

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