Abstract: The data is not only stored in the cloud but also can be shared across multiple users with the help of cloud storage services. Wherein, Public data is shared among multiple users but to preserve the Data Integrity is a challenge. In this paper, we propose shared public auditing and preserve the Data Integrity stored in the cloud. On our mechanism, We are going to securely increase the privacy level of the confidential data in a way so that the data is cannot be easily extracted from the Hacker or any unknown user and also we get the help from the TPA (Third Party Auditor), wherein it stores the unique key and using this it is encrypted and stored but the cloud user will be unaware of it. Only the public data is shared among various users in the cloud.

Keywords: Data Integrity, Shared Public Auditing, Hacker.