Simulation of Data Integrity Proof in Cloud Storage

Cloud computing technology enables users and enterprises with various capabilities to store and process their data in either privately owned cloud or on a third-party server in order to make data accessing mechanisms much more easy and reliable. This service releases the burden of huge local data storage and their preservation by outsourcing mass data to the cloud. Apart from reducing the storage costs cloud data outsourcing to the cloud also helps in reducing the maintenance. The data stored in cloud storage is moved to a remotely located cloud server where the user does not have any control and unaware of the storage location, however data is provided back to the owner whenever required. Here risk involved is modification or tampering of data. Hence, there is no guarantee that data stored in the cloud is secured and not altered by the cloud or Third Party Auditor (TPA). Therefore data integrity in the cloud storage should be kept assured with consistency, correctness, accessibility and high quality. In this paper we provide a scheme which gives a proof of data integrity in the cloud which the user can employ to check the correctness of his data in the cloud. This research ensures that the storage at the client side is minimal which will be beneficial for thin clients. One of the significant concerns that need to be spoken is to assure the customer of the integrity i.e. rightness of his data in the cloud as the data is physically not accessible to the user. The data integrity verification is done by introducing third party auditor (TPA) who has privileges to check the integrity of data in cloud on behalf of cloud client. TPA notifies the Cloud client when the data integrity is lost or compromised. This proof can be agreed upon by both the cloud and customer and can be incorporated in the Service Level Agreement (SLA).