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Cloud data privacy protection public auditing method based on symmetric keys

A privacy protection and symmetric key technology, which is applied in the field of cloud computing security, can solve the problems of not being able to provide public auditing and privacy protection security performance at the same time, and high overhead, and achieve the effect of saving computing and storage costs

Active Publication Date: 2014-07-09
THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are public-key based schemes, which can be expensive
Existing audit schemes based on symmetric keys cannot provide the security performance of public audit and privacy protection at the same time

Method used

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  • Cloud data privacy protection public auditing method based on symmetric keys
  • Cloud data privacy protection public auditing method based on symmetric keys

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0018] Before giving the specific implementation process of the scheme, explain the four definitions:

[0019] (1) Four entities in the scheme: data owner DO, cloud server CS, third-party audit TPA and users. DO has a set of data blocks M, for each data block m i ∈M generates a signature σ i , a set of signatures σ i Represented by Φ; the main function of CS is to be responsible for content management, storing data block M and signature Φ, all data information related to service content is stored on CS, and allows the client to download or update content information; when receiving When the user data audit request is received, TPA submits the request to the cloud service provider, audits the relevant data information returned by the cloud ser...

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Abstract

The invention discloses a cloud data privacy protection public auditing method based on symmetric keys and belongs to the technical field of cloud computing safety. The method comprises the steps of (1) key generation, (2) signature computing and (3) proving. In the key generation step, a data owner generates four private keys randomly, two private key pairs are formed, one private key pair is shared by the data owner and a cloud server, and the other private key pair is shared by the data owner and a third-party auditor; in the signature computing step, the data owner inputs the private keys and data blocks, signature computing is conducted on each data block and indexes of the data block, and signatures are sent to the cloud server; in the proving step, after the cloud server receives the indexes of the data blocks and challenges generated by the third-party auditor randomly from the third-party auditor, data integrity evidence is obtained through computing and sent to the third-party auditor, and the third-party auditor conducts verification. By means of the cloud data privacy protection public auditing method based on the symmetric keys, computing and storing expenses are reduced, and public auditing and privacy protection can be provided.

Description

technical field [0001] The invention belongs to the technical field of cloud computing security, and in particular relates to a public audit method for privacy protection of cloud data based on a symmetric key. Background technique [0002] Cloud computing is a new storage model in which data owners (DO) outsource data to cloud servers (CS) to reduce the storage burden and access them through independent geographic locations. However, outsourcing data has caused security issues of data integrity, and data owners are worried that data will be lost or changed. The traditional data integrity verification method is that the data owner downloads the data and checks the integrity. But this will result in high communication overhead for the network and high computational overhead for data owners. [0003] To solve this problem, public audit is a better choice. Third-party audit (TPA) replaces data owners with an easy way to verify data integrity, and data owners do not participat...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/32H04L9/08
Inventor 金波陈长松裴蓓
Owner THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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