Decentralized Nature of Data Storage Access Control in Cloud using Anonymous Authentication

Cloud computing is one of the emerging technologies in information and communication world. With the advent of cloud computing, data owners are motivated to outsource their complex data from local sites to commercial public cloud for great flexibility and high economic savings. Hence, for such reasons the data that is stored in cloud systems must be encrypted. We propose a new decentralized access control scheme for secure data storage in clouds that supports anonymous authentication. Here we hide the identity of user who accesses the data from cloud systems. Access control is one of the important added features which enable only valid users to decrypt the data and access it depending upon the access privileges given to the valid user. Access control and authentication is decentralized and robust as compared to earlier schemas which are centralized in nature. The communication, computation and storage overheads are comparable to centralized approaches.