Journal of Research in Computer Science and Engineering ISSN: 2457-0818 (Online)

Authors:-Dr. F. Leo John 

Abstract:-Secure sharing of data in multi-Cloud storage is not an easy task for Cloud service providers. Many Cloud services provide generic or data specific Cloud storage (e.g., Google Picasa or sound Cloud). However, both Cloud storage types have data storage in common. In the existing scheme, the architecture features attribute-based encryption for selective access authorization and cryptographic secret sharing in order to disperse data across multiple Clouds and, the security of key distribution is based on the secure communication Cloud provider, however, to have such a Cloud provider is a strong assumption and is difficult for data sharing. We tried to propose a novel architecture for the multi-Cloud provider by describing a key aggregate crypto system scheme that produces a constant size aggregate key for flexible choices of cipher text set in Cloud storage, but the other encrypted files outside the set remain confidential. This scheme provides a secure and easy way of data sharing in multi-Cloud storage within an organization authorities as well as non-organizational users.