Abstract one of the services provided by the cloud environment is cloud storage which allows users to store, remotely manage and access their data over the internet. However, the limited control granted to users over remote cloud nodes makes users worry about the integrity of their data as the user'data can be accessed or modified by external attackers. Therefore, a new terminology called data auditing has been evolved to allow users to use cloud storage as they use their local storage without worrying about the integrity of their