Assuring correctness for securing outsourced data repository in cloud environment

The data storage in the cloud environment offers users with infrastructure affability, quicker deployment of applications and data, cost effective, acclimation of cloud resources to real needs, enhanced productivity, etc. Inspite of these beneficial factors, there are several disadvantages to the widespread adoption of cloud computing remain. Among them, surity towards the exactness of the outsourced data and matter of concealment takes the major part. In order to avoid a security hazard for the outsourced data, we propose the dynamic audit services that enable integrity verification of data. An Interactive Proof System (IPS) is introduced to protect the privacy of the data. The DataOwner stores the large number of data in the cloud after encrypting the data for auditing purpose. An Authorized Application (AA), manipulates the outsourced data and the AA helps the cloud users to access the services. Our system provides secure auditing while the data owner, outsourcing the data in the cloud. And after performing auditing operations, security solutions are enhanced for the purpose of detecting malicious users with the help of Certificate Authority, using the hash values and a TimeStamp.