Cloud computing is considered to be the next big thing in information technology. Application software's and databases can be stored in a remote site known as cloud data centers in which security is a concern from client point of view. The new method which is used to store and manage data without capital investment has brought many security challenges which are new to the IT world. This journal focuses on the security and integrity issues of data stored in cloud servers. Client hires a Third party auditor to check the correctness of the data periodically.