Abstract: Cloud computing is a new computing model which enables individuals and organizations to gain access to huge computing resources without capital investment. It does mean that users can utilize computing resources in pay per use fashion. With virtualization technology the commoditization of computing resources has become a reality. The world is experiencing the advantages of cloud computing as industry giants like Microsoft, Google, Amazon etc. are providing cloud computing services. However, the cloud environment is considered in trusted as it is accessed through Internet. Therefore people have security concerns on data storage security of cloud computing. Many techniques have been proposed in the literature for ensuring data storage security in cloud computing. This paper proposes a model for cloud data integrity in the distributed multi-cloud environment. The proposed method is testing using a prototype application which demonstrates the proof of concept. The empirical results revealed that the proposed system is exhibits higher performance when compared with existing solution.

Keywords: Cloud computing, security, data integrity, multi-cloud.