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Publicly verifiable data fault-tolerant secure storage method

A technology for safe storage and data fault tolerance, applied in the field of cryptography

Active Publication Date: 2019-04-16
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the information rate of existing secret sharing schemes based on traditional public key cryptosystems or bilinear pairings on elliptic curves is generally 1 / 2, and the highest reaches 2 / 3. Therefore, applying such secret sharing schemes to big data In cloud storage, when sharing or storing 1bit data, the required space is as high as 2bit. In order to improve the communication efficiency of big data storage and save bandwidth consumption, it is very necessary to increase the information rate of the secret sharing scheme

Method used

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Embodiment Construction

[0043] Embodiment of the present invention: public verifiable data fault-tolerant security storage method, system members include user User who owns data, client Client, front-end cloud service provider FS (Frontend-Server), n cloud storage Sto used to store shares i (Storage), and the corresponding n backend cloud service provider BS i (Backend-Server), where i=1,2,...,n.

[0044] It is mainly divided into four stages: preprocessing stage, share distribution stage, public verification and data storage stage, and data recovery stage. In the preprocessing stage, the client client preprocesses the data to be stored, and the preprocessing results will be directly used in the distribution stage; in the share distribution stage, the client generates n shares and distributes them to the front-end cloud service provider FS, and FS utilizes The multi-linear mapping encrypts the share and sends it to n back-end cloud service providers (BS 1 ,BS 2 ,...,BS n ) to send encrypted share...

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Abstract

The invention provides a public verifiable data fault tolerance safety storage method comprising the following steps: using multilinear mapping and public verifiable secret sharing technology to distribute and commit data; using the public verifiable secret sharing technology to share to-be-stored data in a plurality of cloud service providers, and storing data into a plurality of cloud storage servers; allowing a client side to set a threshold value t, data can be restored if t or more rear end cloud service providers provide effective shares, and the data cannot be restored when less than t-1 shares are provided, thus preventing single point failure fault generation. Even if certain shares are lost or damaged, the original data can be still restored when at least t effective shares are provided; the technology allows the cloud storage method to have better fault tolerance function, thus ensuring storage scheme safety, reducing big data storage time and calculating consumption in share coding / decoding operation, and ensuring storage process safety and public verifiability.

Description

technical field [0001] The invention relates to the technical field of cryptography, in particular to an openly verifiable data fault-tolerant safe storage method. Background technique [0002] Cloud Storage (Cloud Storage) is a storage model proposed in recent years. As a branch of cloud computing that develops rapidly, due to its technical feasibility, it is cheaper and safer than traditional data storage. The advantage of cloud storage is that it can flexibly reduce the cost of storage, and the risk of data loss can be reduced by using cloud storage, and its services are getting deeper and deeper into people's lives. Today, cloud storage technology and concepts have changed the traditional storage resource application model. It provides a scalable, safe and reliable storage solution for massive data. For the shortage of storage resources and management issues in the "Guizhou on the Cloud" platform, Inconvenience and other problems, cloud storage has proposed a good solut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/62H04L29/08
CPCG06F21/6218H04L67/1097
Inventor 田有亮彭巧
Owner GUIZHOU UNIV
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