File storage and access method and system based on block chain

A technology for file storage and access methods, applied in the field of blockchain, which can solve problems such as leaking information and tampering

Active Publication Date: 2020-02-11
深圳市乾数科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In human socialization activities, regarding the storage, access, and confidentiality of important files, a centralized management mechanism is usually adopted. For example, administrators are granted file management permissions such as adding, deleting, reading, and writing

Method used

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  • File storage and access method and system based on block chain
  • File storage and access method and system based on block chain
  • File storage and access method and system based on block chain

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0068] A block chain-based file storage and access method proposed by the present invention comprises the following steps:

[0069] Step S1: file division, first define the set of sub-file division methods, the division method used and the control parameters, divide the target file into several sub-files, and each sub-file corresponds to an authorized user;

[0070] Step S2: File encrypted signature, the authorized user encrypts and signs the corresponding sub-file and sends it to the file management module, the file management module performs signature verification, and decides whether the verification is passed;

[0071] Step S3: file information is uploaded to the chain, and the file management module creates a blockchain smart contract, uploads the encrypted sub-files and encrypted sub-file related information that have passed the verification in step S2, stores them in the blockchain smart contract, and stores them in the blockchain smart contract. All encrypted file encr...

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PUM

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Abstract

The invention discloses a file storage and access method and system based on a block chain, and the method comprises the steps: carrying out file partitioning, carrying out file encryption signature,carrying out file information chaining, carrying out file access authorization, carrying out file reconstruction and sharing, and finally transmitting a reconstruction target file to an access user inan encrypted manner for related reading or writing operation. Separated file storage and a file management mechanism based on a blockchain smart contract are adopted, the file access permission management module utilizes the main characteristics of openness, transparency, tamper resistance and the like of a blockchain, and the security and traceability of file access are effectively enhanced. Bydividing the file into a plurality of sub-files and encrypting the sub-files with different private keys, the file can be prevented from being operated unidirectionally. Meanwhile, the sub-file related information is encrypted and stored in the block chain and cannot be tampered, so that the security of the file information is greatly enhanced.

Description

technical field [0001] The present invention relates to the technical field of blockchain, in particular to a method and system for storing and accessing files based on blockchain. Background technique [0002] In human socialization activities, regarding the storage, access, and confidentiality of important files, a centralized management mechanism is usually adopted. For example, administrators are granted file management permissions such as adding, deleting, reading, and writing, and the files are unified by file administrators. Manage files to ensure the efficiency of file management. However, this centralized management method that authorizes administrators to manage files has potential risks, such as risks such as tampering and information disclosure. [0003] Blockchain technology is a distributed ledger system, including a series of technologies such as encryption and decryption, consensus mechanism, peer-to-peer communication network, and chain storage. It has the c...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08H04L9/32H04L9/30H04L9/06G06F21/60G06F21/64
CPCH04L63/10H04L63/0428H04L67/1097H04L9/3247H04L9/3066H04L9/0643G06F21/602G06F21/604G06F21/64G06F2221/2141G06F2221/2107H04L9/50
Inventor 杨忠勋
Owner 深圳市乾数科技有限公司
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