Research On Integrity Verification Method Of Shared Data In Cloud Storage

With the rapid development of mobile network and the popularity of its use,the storage devices of individuals and organizations can not meet the growing needs of data storage.Because of the advantages of low consumption and convenient and quick access,cloud storage is widely used by individuals and organizations who store their data in the cloud,which gradually form cloud storage service.However,cloud storage server is a profit-making organization,so it will cause data leakage,tampering,deletion and disclosure of users and other issues.Therefore,the audit of cloud data integrity has become a research hotspot,the integrity verification scheme can effectively verify the integrity of data stored in the cloudTherefore,to check data integrity in cloud,under the premise of ensuring that the user's identity information and data privacy information are not leaked,to achieve efficient integrity verification of multiple data blocks.The main contents of this paper is as follows1.We proposes a scheme of identity based on batch audit scheme in cloud stor,age,which embeds a group label to realize dynamic group management when generating user public-private key pairs.When the data is updated,it satisfies the existing signature mechanism,and uses homomorphic technology to realize batch audit of multiple data blocks,which improves the audit efficiency of the scheme2.A traceable public auditing scheme with non-manager in cloud storage is pro-posed.In this scheme,the same group of users is in the same position,signature and commitment value are generated by ring signature to afford anonymity of users.Secondly,a group identification value is embedded in each user's private key to distinguish different groups and realize user tracking conveniently.At last,homomorphism technology is used to realize the batch audit of multi-user and multi data block,the audit efficiency has been improved3.A certificateless public auditing scheme for shared data is put forward.Firstly,this scheme realizes the public audit function without certificate management problems.Secondly,the user's identity can be tracked through ELGamal system to prevent the user's malicious behavior.Finally,batch audit is realized by using homomorphic technology which efficiently completes the audit requirements of multi-user and multi data blockUnder the assumption of corresponding difficulty problem,analysis results show that the three proposed schemes in this paper have the characteristics of unforgeabil-ity,privacy protection,validity when auditing the integrity of shared data,security and efficiency.