Division and replication for data with public auditing scheme for cloud storage

Data Outsourcing in cloud computing, require high security measures as the data may be tampered by illegal users or attackers. This may affect the performance of cloud, as an increase in retrieval time of data. While applying the security measures it is required to take under consideration the retrieval time of data. In this paper, both the issues are tried to overcome by scattering the data file over the cloud nodes. The cloud nodes store only a fraction of the file which is divided into multiple fragments. The cloud nodes are aligned with certain distance using the concept T-coloring where an attacker is unable to track the next node. To improve the retrieval time the fragments are replicated over the nodes which are remained by placing the fragments. To enhance the security standard the fragmented file is encrypted before placement on cloud node. An auditing scheme is employed which continually monitor the cloud nodes. If any damage occurs the auditing system regenerate the data. This system provide security and auditing of cloud data.