Research On Accountability Scheme Of Data Integrity For Cloud Storage

In recent years,the cloud storage service gets a rapid development with its advantages of high availability,strong flexibility and massive virtual storage space.Accompanied with its convenience in management and maintenance of the data for users,some security problems in cloud storage are gradually revealed.The vendor should be fully responsible for the safety of users' data stored in the cloud.Many safety accidents about cloud storage in recent years show that the cloud storage service is not as safe and reliable as its statement,which is the key factor that hinders the potential consumers to try to use the cloud storage service.The data integrity in cloud has become a hot topic.When the data integrity is abnormal,a resolution to solve the liability dispute is inevitable.The accountability scheme of data integrity for cloud storage uses a scheme of data integrity verification based on the Merkel Hash Tree,supporting data integrity verification without having to return all the data content.With the number of leaf nodes added in hash tree,it can uniquely determine the index of the data block,which can resist the attack of data block replacement.And it use block chain technology to collect the interactive records of participants in the cloud storage services.The records can be undeniable and used as the evidence when data integrity verification is abnormal.The accountability scheme of data integrity for cloud storage uses the technology of block chain.With the characteristics of decentralization of block chain,the collected evidence is maintained by miners in common without the supervision of the authoritative third-party,which can reduce the cost of introducing third-party organization and avoid the risk of loss of evidence due to the collapse of a single node.To some extent,it can reduce the trust threshold of the potential cloud consumers to cloud service providers.