In current scenario, it becomes difficult to manage the demand of all RaaS (Resource as a service) by a clientin a single cloud. This problem could be overcome by a federated cloud. The great challenge of federated cloud computing are satisfying the client needs, data privacy and security. With the help of cloud, the clients can store and access the data as per their needs. This ensures security regarding the authorization of the client’s data. Keeping the data in secured way is one of the important services of the cloud. In this paper we propose one privacy preserving public auditing scheme for federated cloud. © Research India Publications.