Cloud computing, large number of computers that are connected through a real-time communication network. The users are flexible while storing their information in cloud network. At any time period they are capable of accessing their information from network. By this application the way of storage of users reduces the maintenance complexity. It works on providing the access to the users in the cloud network audit ability for cloud data storage security is key importance so that users can stay to there will be third party auditor to keep data efficiently. With the secure introduce an effective third party auditor (TPA); there are the two fundamental requirements. 1) TPA should be able to efficiently audit the cloud data storage without demanding the local copy of data, and introduce no additional on-line burden to the cloud user; 2) The third party auditing process should bring in no new vulnerabilities towards user data privacy.