Research On Data Integrity Auditing Technology In Cloud Storage

As the services provided by cloud computing have many advantages,more and more individuals and organizations transfer their data and business processes to the cloud to reduce the burden of local storage and related maintenance costs.However,due to various internal or external security threats,cloud storage services may not be completely reliable.This dissertation is mainly devoted to the research of the privacy-preserving TPA(Third Party Auditor)auditing schemes for cloud storage.These schemes can remotely handle the checking of the integrity for outsourced data.The main work of this dissertation can be summarized as follows:1)Based on the map-version table(MVT)structure,a privacy-preserving TPA auditing scheme is proposed for cloud storage,which can effectively support various block-level dynamic operations.In the scheme,the random mask technology is used to blind all the information returned by the server during the audit process,which has better privacy-preserving property than other TPA auditing schemes for cloud storage.2)An index-stub table structure is proposed,and based on this structure,a TPA auditing scheme that supports privacy-preserving and data dynamic operations is proposed for cloud storage.Compared with other cloud storage auditing schemes based on two-dimensional table structure,the data maintenance of the user is easier in the scheme,and the TPA is more efficient in the auditing process.3)Based on the authenticated skip list structure,a user stateless TPA auditing scheme is proposed for cloud storage,which can effectively support the privacy-preserving against TPA during auditing process and remotely data dynamic operation.Moreover,in addition to saving some key-related parameters and file tags,the user does not need to maintain any other data,and implements the "stateless" of the user.Compared with other privacy-preserving auditing schemes for cloud storage,this scheme completely solves the problem that the user needs to maintain data in the magnitude of the number of data blocks.4)Based on the authenticated skip list structure,a TPA auditing scheme for cloud storage that is undeniable in storage process is proposed.In the solution,the server provides the user with an undeniable time-stamped receipt,which can prevent the cloud server from being blackmailed by dishonest users,and can ensure that the cloud server can actually update the user's data according to the requirements of the user.The scheme can effectively support the dynamic operation in the block level and privacy-preserving during the audit process,and the scheme is stateless on the user side.