Data secure access method used for cloud storage and user terminal system

A cloud storage system and data security technology, applied in transmission systems, electrical components, etc., can solve problems such as high overhead and inability to fully realize user data privacy protection, achieve low overhead, balance security and performance overhead, and reduce system costs. The effect of spending

Inactive Publication Date: 2012-09-12
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have brought a lot of overhead in the actual data operation process, and because the complete data is hosted i

Method used

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  • Data secure access method used for cloud storage and user terminal system
  • Data secure access method used for cloud storage and user terminal system
  • Data secure access method used for cloud storage and user terminal system

Examples

Experimental program
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Embodiment Construction

[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] The idea of ​​the present invention is to divide the file to be stored into two data blocks, one large and one small, encrypt the large data block and hand it over to the cloud storage system for managed storage, and divide the small data block, file segmentation information, and encrypted information It is stored locally on the user end, thus solving the data security problem caused by the separation of data management rights and ownership.

[0030] The client system for cloud storage of the present invention includes: a file splitting module, a file encryption module, and a file storage module; wherein the file splitting module is responsible for splitting the original file to be stored when storing, and converting the large data when the file is retrieved. Blocks and small data blocks are spliced ​​into the original file; the file encryption m...

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Abstract

The invention discloses a data secure access method used for cloud storage. When storing data, a user terminal divides an original file as a big data block and a small data block, and stores the small data block and file division information at local, the big data block is encrypted and transmitted to a cloud storage system, and encrypted information is stored at local. When retrieving the data, the cloud storage system transmits the encrypted big data block to the user terminal according to a user terminal request, and the user terminal carries out decryption by utilizing the encrypted information stored at local and splices the small data block and the decrypted big data block into the original file according to the file division information. In file division, a mode of extracting data with a fixed magnitude can be employed, and a mode of extracting data with an unfixed magnitude can be employed too. Further, a strategy of hierarchical encryption is employed in data encryption, thus system spending is reduced. The invention also discloses a user terminal system used for the cloud storage. According to the method and the system, the security of user data can be greatly raised with low cost.

Description

technical field [0001] The invention relates to a data security access method and a user terminal system for cloud storage, and belongs to the cross application field of information technology of distributed computing, information security and computer software. Background technique [0002] Cloud storage is an extension and development of the concept of cloud computing. It refers to the collection of a large number of different types of storage devices in the network through application software to work together through functions such as cluster applications, distributed computing, or distributed file systems. And through various corresponding application software or application interfaces, it jointly provides a complex storage resource pool system with intensive data storage and business access functions for multiple tenants. [0003] The core root of data security issues in cloud storage systems is the separation of data management rights and ownership. The data belongin...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06
Inventor 徐小龙周静岚杨庚陈丹伟张伟徐劲松
Owner NANJING UNIV OF POSTS & TELECOMM
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