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Cloud storage data confidentiality protection method

A confidentiality and cloud storage technology, applied in digital data protection, electronic digital data processing, computer security devices, etc., can solve problems such as data tampering and deletion, illegal viewing of user personal data, user data leakage, etc., to improve confidentiality , the effect of increasing the difficulty of deciphering

Active Publication Date: 2019-09-06
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cloud service providers can provide more reliable data backup and data recovery capabilities, cloud service providers are not always trustworthy. On the one hand, internal staff may illegally view user personal data, or cloud service providers may use storage space for , maliciously tampering and deleting data that has not been accessed or is not frequently accessed; on the other hand, the data storage server may be illegally attacked by hackers, resulting in user data leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] figure 1 It is a specific implementation flow chart of the cloud storage data confidentiality protection method of the present invention. Such as figure 1 As shown, the specific steps of the cloud storage data confidentiality protection method of the present invention include:

[0028] S101: Data block reorganization:

[0029] The data file F to be uploaded to the cloud storage server is reorganized into blocks, and its main function is to reduce the effective information of a single data block. figure 2 It is a flowchart of data block reorganization in the present invention. Such as figure 2 As shown, the specific steps of data block reorganization in the present invention include:

[0030] S201: Set data block parameters:

[0031] Set the data block parameters M and N according to the actual situation, and both M and N are positive integers.

[0032] S202: Data padding with zeros:

[0033] Determine whether the size of the data file F to be uploaded is a mul...

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PUM

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Abstract

The invention discloses a cloud storage data confidentiality protection method. The method comprises: partitioning the data file to be uploaded to the cloud storage server by adopting the following method; then, obtaining a plurality of data blocks through scrambling and sequential recombination; dividing each data block into sub-data blocks; dividing the sub-data blocks into two parts; encryptingeach part by adopting different encryption algorithms; recombining the obtained ciphertext data blocks to obtain a ciphertext data file; uploading the data to a cloud storage server for storage; whendata needs to be used, the data can be used, downloading the ciphertext data file from the cloud storage server, dividing the ciphertext data file according to the inverse process of ciphertext datablock recombination during uploading, decrypting different parts by adopting different decryption algorithms, and recombining the decrypted data blocks according to the inverse process of data block recombination during uploading to recover the data file. According to the method, data block recombination and cross encryption are adopted, so that the security of storing the user data on the cloud storage server is improved.

Description

technical field [0001] The invention belongs to the technical field of cloud storage data encryption, and more specifically relates to a method for protecting the confidentiality of cloud storage data. Background technique [0002] Cloud storage is an emerging network storage technology derived from the development of cloud computing. As a new type of storage service, cloud storage has gradually begun to be valued by people because of its high scalability, high reliability, low price, and access anytime and anywhere. Stored in the cloud. There are many benefits brought by this. For individuals and enterprises, the cost of purchasing storage devices can be reduced, because cloud storage services are charged according to their specific storage needs. For those large enterprises, it can reduce the operation and maintenance cost and difficulty of the enterprise. The enterprise does not need to send additional hardware facility management and maintenance personnel, and only nee...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06G06F21/62G06F21/60
CPCG06F21/602G06F21/6218H04L63/0428H04L63/0485H04L67/06H04L67/1097
Inventor 于力张豪邹见效徐红兵
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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