DYNAMIC STRUCTURED PRIVILEGES WITH MULTI- OWNER DATA SHARING FOR DYNAMIC GROUPS IN THE CLOUD
A. Velayudham, M. M Ramya Selvi, B. Hariharan, G. V. S Gohila · 2014
Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet. The most basic and important service offered by cloud is data storage. However the major obstacle in the multi owner data sharing for the wide deployment of cloud computing is identity privacy while preserving data. In the existing approaches, a secure multiowner data sharing scheme, named Mona is used, for dynamic groups in the cloud that uses the group signature and dynamic broadcast encryption techniques. But this method to invoke and revoke of client is not dynamic on user privileges. Also the system supports only static groups. In the proposed scheme, we present an efficient structure for facts and figures sharing scheme to achieve dynamic privileges. Using this structure, any data owner can change the service class of each user dynamically and change the structure of privileges flexibly when it is needed. The proposed is also designed to support group migration between the users so that the users can revocate and change the group at any time. Thus by using the dynamic structure privileges, the system performs linearly with the increase in the number of users. But in the existing approaches, when the number of users increases the time execution is also increased which makes the system time consuming.