ENABLING ANONYMOUS ENDORSEMENT IN CLOUDS WITH DECENTRALIZED ACCESS CONTROL

A decentralized access control scheme for data storage in clouds that supports anonymous authentication authentication. In this scheme, the cloud checks the validity of the series without knowing the user's identity before storing data. It also has the added feature of access control in which only valid users are able to decrypt the stored information. This prevents replay attacks and supports conception, variation, and reading data stored in the cloud. It also supports user revocation . This is an important property because a user, revoked of its attributes, might no longer be able to write to the cloud. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches