Deduplication management and access control across multiple cloud service providers

Cloud computing is an information technology (IT) paradigm that enables ubiquitous access to shared pools of configurable system resources and higher-level services that can be rapidly provisioned with minimal management effort, often over the Internet. Cloud computing relies on sharing of resources to achieve coherence and economies of scale, similar to a public utility. In order to protect the privacy and security of authorized users, the data has to be encrypted. However the data which is encrypted occupies much of the cloud storage space and data sharing among authorized users is complicated. The basic requirement for any cloud data storage with protection needs the ability to reduce the overall cost of providing the same service that clients could do in their own data centers. One method to achieve this is data deduplication across multiple end-user clients. Existing deduplication schemes involves extraction from scenarios of an application where the data is controlled by data owners or cloud servers. Depending upon the sensitivity of data they cannot satisfy demands of data owners. This paper presents a data management scheme which is heterogeneous that offers flexibility and access control across multiple cloud service providers. The performance is evaluated with security and implemented in real time scenario.