Blockchain and cloud data collaborative sharing method

A data collaboration and data sharing technology, applied in the field of secure cloud storage, to achieve the effect of protecting data privacy, realizing safe sharing, and ensuring consistency

Active Publication Date: 2020-08-11
YGSOFT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some on-chain data involves security and privacy, such as bank account transactions

Method used

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  • Blockchain and cloud data collaborative sharing method
  • Blockchain and cloud data collaborative sharing method
  • Blockchain and cloud data collaborative sharing method

Examples

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Embodiment Construction

[0043] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.

[0044] A specific embodiment of the present invention discloses a blockchain and cloud data collaborative sharing method, such as figure 1 shown, including the following steps:

[0045] Step S101. Encrypted storage step: using the blockchain+cloud storage architecture, storing the encrypted ciphertext of the original data file in the cloud, and storing the metadata of the original data file encrypted on the blockchain; the metadata The data includes the key used for encryption and the storage location information of the ciphertext on the cloud server.

[0046] Step S102, data sharing step: After the data owner DO obtains the key used for encryption an...

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Abstract

The invention relates to a blockchain and cloud data collaborative sharing method, belongs to the technical field of security cloud storage, and solves the problems of consistency and collaboration ofdata on and off a chain. The method comprises the steps that a block chain plus cloud storage architecture is adopted, a ciphertext obtained after an original data file is encrypted is stored in a cloud end, and metadata of the original data file is encrypted and stored in a block chain; a data owner DO acquires the encrypted metadata from the block chain, and decrypts the encrypted metadata to obtain a secret key and a ciphertext storage position for encryption; proxy re-encryption is carried out on the ciphertext to generate a new key and a re-encrypted ciphertext storage position; the newsecret key and the re-encrypted ciphertext storage position are shared to a data user DU; and the data user DU downloads the re-encrypted ciphertext from the new storage position, and decrypts the re-encrypted ciphertext by adopting the new key to obtain plaintext information of the cloud data. The storage capacity of the block chain is expanded, and the consensus efficiency is improved; and the data consistency is ensured, and data privacy during data sharing and transmission is protected.

Description

technical field [0001] The invention relates to the technical field of secure cloud storage, in particular to a method for synergistic sharing of blockchain and cloud data. Background technique [0002] The information stored on the public chain is open to all users, and all nodes can copy and share the data on the blockchain. An attacker may obtain information such as the fund balance and transaction details of a specific account, and the flow of specific funds by analyzing transaction records. In the permission chain, although the identity access mechanism is added to close the channel for unauthorized nodes to access data, the risk of privacy leakage is reduced, but it also faces the problem of data channel isolation. With the change of blockchain application scenarios, in addition to transaction information, semi / unstructured pictures, voice, video, and file data appear in the on-chain data. Some on-chain data involves security and privacy, such as bank account transac...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F21/62G06F16/27H04L29/06H04L29/08
CPCG06F21/602H04L63/0435H04L67/1097G06F16/27G06F21/6245
Inventor 鲁静宋斌程晗蕾段焱明
Owner YGSOFT INC
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