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Agent-based cloud storage data integrity detection method

A technology of data integrity and detection methods, applied in the field of cloud security, can solve problems such as low efficiency and unsuitability for lightweight mobile devices, and achieve high computing efficiency and improve computing efficiency

Active Publication Date: 2019-08-09
ANHUI UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing public cloud storage data integrity detection algorithms generally require expensive bilinear pairing operations, which are inefficient and not suitable for lightweight mobile devices

Method used

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Examples

Experimental program
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Embodiment Construction

[0039] Such as figure 1 Shown, an agent-based cloud storage data integrity detection method, the method includes the following steps:

[0040] Step 1: System initialization;

[0041] Select the security parameter λ, the user selects a prime number p with λ bit length, and the finite field Z p Generator g, random signature public-private key pair (spk, ssk), signature scheme (Sig, Ver), the signature scheme can specifically use the DSA digital signature standard algorithm; pseudo-random function PRF, and random integers x, y∈Z p , calculate X=g x ,Y=g y ; cloud selection z ∈ Z p , calculate Z=g z , the system public parameters are PP=(p, g, spk, PRF, X, Y, Z).

[0042] Step 2: entrust an agent;

[0043] The user generates a power of attorney w, which includes the identity information of the principal and the agent and the validity period and other information, and the user selects k∈Z p , calculate K=g k , and then sign the proxy book and k with the private key ssk to ...

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Abstract

The invention discloses an agent-based cloud storage data integrity detection method, which supports a designated agent to carry out public integrity detection on cloud storage data, ensures that cloud forgery is avoided by using a Hash tree, and calculates a block label by using a simple pseudo-random function and Hash operation. A traditional public cloud storage integrity detection method relates to complex bilinear pairing operation, and expensive calculation expenditure is needed. According to the scheme, the calculation of the file label adopts the pseudo-random function and the Hash operation with very low expenditure, the proven generation and detection process only needs simple algebraic operation and Hash operation, and complex bilinear pairing operation is not needed, so that compared with a common data integrity detection method, the method is higher in calculation efficiency.

Description

technical field [0001] The invention belongs to the field of cloud security and relates to a data integrity detection technology, in particular to an agent-based cloud storage data integrity detection method. Background technique [0002] With the development of cloud storage technology, more and more users upload their data to cloud storage in order to save local storage resources. However, while cloud storage provides users with convenience, it also brings some security issues, such as cloud storage. In order to save costs, some data that users have not accessed for a long time may be deleted. Users cannot tell whether the data stored in the cloud has been modified, so cloud storage servers need to provide users with evidence to prove that their data has not been destroyed. In recent years, due to the popularity of lightweight mobile devices, more and more users hope to be able to detect the integrity of outsourced data anytime, anywhere on mobile devices. [0003] The t...

Claims

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Application Information

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IPC IPC(8): G06F21/64H04L29/06H04L29/08
CPCG06F21/64H04L63/20H04L67/1097H04L67/56
Inventor 田苗苗叶康健包敏徐开元刘畅
Owner ANHUI UNIVERSITY
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