Cloud data integrity verification method and system supporting efficient dynamic updating

A technology of integrity verification and dynamic update, applied in digital transmission systems, transmission systems, user identity/authority verification, etc., can solve problems such as high overhead and low efficiency

Active Publication Date: 2021-04-16
INST OF INFORMATION ENG CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] Aiming at the problem of cloud data integrity in cloud services, the present invention proposes a cloud data integrity verification method and system supporting efficient dynamic updates, which solves the problems of low efficiency and high overhead in the above-mentioned cloud data integrity verification technology

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  • Cloud data integrity verification method and system supporting efficient dynamic updating
  • Cloud data integrity verification method and system supporting efficient dynamic updating
  • Cloud data integrity verification method and system supporting efficient dynamic updating

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Embodiment Construction

[0079] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through the embodiments and accompanying drawings.

[0080] The present invention employs a challenge-response mechanism aimed at verifying the integrity of cloud data. Specifically, the data owner or third-party audit TPA challenges the CSP by randomly extracting a series of file blocks, and the CSP uses the stored cloud data and the homomorphic verifier to generate evidence and respond to the challenge, and finally verifies the return value to determine whether the cloud data is whole. In order to support the dynamic update in cloud data integrity verification, the present invention makes the following designs. First, in order to ensure the stability of the dynamic update process, the TPA in the present invention only participates in the integrity verification process and does not participate in the dynamic ...

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Abstract

The invention discloses a cloud data integrity verification method and system supporting efficient dynamic update, and the method comprises the steps that a data owner divides a storage file into n file blocks mi, converts an obtained file F into an MHT-list data structure, and transmits the generated file F, a file label t, a generated file block homomorphic verifier set phi and a root node signature set SIG to a CSP; and sends the file label t to the TPA; the TPA sends the generated random challenge chal to the CSP to obtain an integrity proof P; and the TPA calculates an integrity verification result and returns the integrity verification result to the data owner. According to the invention, the problem that the TPA needs to participate in and record the dynamic updating process in the existing cloud data integrity verification scheme is solved, the stability of the scheme in the dynamic updating process is improved, and the problem of relatively high communication overhead caused by an overlong verification path in the integrity verification process is solved; and compared with the operation granularity of a single file block, the calculation and communication overhead is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of cloud service security attributes, and in particular relates to a cloud data integrity verification method and system supporting efficient dynamic update. Background technique [0002] The data outsourcing service provided by cloud storage has brought great convenience to users and is an important infrastructure in today's cloud computing era. More and more individuals or organizations are migrating data from local to cloud. However, the cloud service provider (Cloud Service Provider, CSP) is not a completely trusted entity, and it brings a variety of security risks while bringing efficient services to users. One of the biggest problems is the integrity of the data in the CSP Cannot be guaranteed. For example, CSPs may be subject to hardware crashes and malicious attacks, resulting in the corruption of stored data. To make matters worse, users like to delete the copy from local storage after outsourced ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/00H04L9/30H04L9/32H04L29/08
Inventor 万家伟刘丽敏陈天宇贾世杰张阳钱文飞赵欣怡吕娜王平建
Owner INST OF INFORMATION ENG CAS
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