A multi-backup data holdings certification method in cloud storage environment

A technology of backing up data and cloud storage, applied in transmission systems, electrical components, etc., can solve the problems of unaffordable users and high cost of label calculation.

Active Publication Date: 2018-12-28
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing multi-replica proof of possession method has the problem of high computational overhead for user-generated tags, which is unaffordable for users

Method used

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  • A multi-backup data holdings certification method in cloud storage environment
  • A multi-backup data holdings certification method in cloud storage environment
  • A multi-backup data holdings certification method in cloud storage environment

Examples

Experimental program
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Embodiment Construction

[0081] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0082] There are two roles in the scheme, such as figure 1 As shown, the user and the cloud service provider (CSP). The user is responsible for preprocessing the file, uploading the file to the cloud storage server, initiating a challenge to the CSP, and verifying the evidence returned by the CSP. Such as image 3 As shown, the CSP is composed of a cloud storage management node and multiple storage nodes. The cloud storage management node is responsible for managing the user's files, and all metadata of the files are stored on the management node. Cloud storage nodes are responsible for storing user data and computing evidence.

[0083] ●User

[0084] The user is the owner of the file, and is responsible for preprocessing the file during the file upload stage, including generating a key, cutting the file into pieces, generating a copy of the file, ...

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PUM

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Abstract

The invention discloses a multi-backup data holding certification method under a cloud storage environment. The method comprises the following steps: 1) a client generates a public and private key pair of a user and uploads the public key pair to a cloud service provider CSP; 2) the client generates n distinguishable copies of the file F; then dividing the file F into m file blocks and generatinglabels of each file block, dividing each file copy into m file blocks, and uploading the labels of the file F and its m file blocks and the file copies to the CSP; 3) the client sends a challenge to the CSP; 4) according to the received challenge, CSP calculates the set Q to be challenged by the user through the public key; and then generating evidence P according to the set Q and the public key and returning the evidence P to the client; 5) the client end adopts the same way to generate the set Q, and then utilizes the evidence P to verify and challenge the integrity of the replica data. Theverification mode of the invention is flexible, and has positive significance to the replica positioning.

Description

technical field [0001] The invention belongs to the field of cloud storage and data integrity, and relates to a cloud multi-backup data possession proof method—FMR-PDP. Users upload data to the cloud. This invention proposes a data possession proof method to verify whether the cloud service provider (CSP) has stored all data copies, and can flexibly verify the integrity of any number of copies. When a user's data is corrupted, the damaged copy of the data can be located and other complete copies can be used to recover the data. Background technique [0002] Cloud storage is an emerging resource storage method formed by combining grid technology, virtualization technology and distributed storage technology. Cloud storage can provide reliable, scalable, and inexpensive data storage services. And a flexible data storage mode is proposed, and users can adjust the storage resources they need according to their own needs. As a result, more and more individuals and organizations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06
CPCH04L63/0442H04L63/0807H04L63/083H04L67/06H04L67/1095H04L67/1097
Inventor 杨雅辉李立敏吴中海
Owner PEKING UNIV
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