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Method for storing and sharing secure files based on blockchain

A security file and block chain technology, applied in the field of block chain-based secure file storage and sharing, can solve the problems of inability to effectively guarantee data confidentiality, integrity, availability, and effective access control of files, and achieve simple and convenient use , Guarantee complete availability, and ensure the effect of sharing security

Active Publication Date: 2018-08-28
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, the problems in the prior art are: The user privacy of cloud storage in the data stored in clear text will be easily obtained by the cloud service provider, which cannot effectively guarantee data confidentiality, integrity, availability, and effective access control for encrypted files

Method used

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  • Method for storing and sharing secure files based on blockchain
  • Method for storing and sharing secure files based on blockchain
  • Method for storing and sharing secure files based on blockchain

Examples

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] The invention mainly includes operations such as encryption and uploading of files, formulation of access policies, synchronization of ledger information, acquisition of keys, downloading and decryption, and the like. The encrypted upload, download and decryption of files, and the formulation of access policies are all completed by the user, and the synchronization of ledger information and the identity verification of shared users are in charge of the accounting nodes. The third-party storage organization used to store data only owns the ciphertext of the file; the client is used to encrypt and decrypt the file, and...

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Abstract

The invention belongs to the technical field of information retrieval and database structure, discloses a method for storing and sharing secure files based on a blockchain, and uses the blockchain technology to realize secure storage and sharing of files. A user encrypts and uploads the files to obtain a file pointer, and acquires the partial file as the excitation after the accounting node writesthe information such as the formulated access policy and the pointer into a blockchain account. And the other users may acquire a file key from the adjacent accounting node or the file owner after satisfying the access policy to decrypt the files so as to finally obtain a plaintext file. The invention ensures the security of the user data, and is simple and convenient for the user to use, and thepublic key cryptography technology makes the file more secure at the same time. The unchangeable modification progress of the blockchain account further ensures the complete availability of the files, enables the user to formulate different access strategies for different files, and enables full control of the files while sharing the same.

Description

technical field [0001] The invention belongs to the technical field of information retrieval and database structure, and in particular relates to a secure file storage and sharing method based on blockchain. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the development of information technology, more and more users now choose to use cloud services to store data. Cloud storage does bring many conveniences to users, including low cost, flexible and convenient services, and easy management. Although cloud storage has many advantages, its use also brings security issues. Users are more concerned about the privacy and security of data. User privacy in plaintext stored data will be easily obtained by cloud service providers. Therefore, users You want to encrypt your own data so that the data is submitted to the cloud service provider in ciphertext. The reason is that users' use of cloud storage will reduce...

Claims

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Application Information

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IPC IPC(8): H04L9/06H04L9/08H04L9/32H04L29/06H04L29/08
CPCH04L9/0643H04L9/0869H04L9/3213H04L9/3247H04L9/3263H04L63/0435H04L67/06H04L67/1097
Inventor 樊凯任延辉王尚阳孙士礼李晖
Owner XIDIAN UNIV
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