Anonymous authentication with Decentralized access control technique in clouds

IJPRES  ABSTRACT— Cloud computing’s multi-tenancy feature, which provides privacy, security and access control challenges, because of sharing of physical resources among untrusted tenants. In order to achieve safe storage, policy based file access control, policy based file assured deletion and policy based renewal of a file stored in a cloud environment, a suitable encryption technique with key management should be applied before outsourcing the data. In this paper a decentralized access control scheme is proposed for secure cloud storage by providing access to the files with the policy based file access using Attribute Based Encryption (ABE) scheme. The proposed scheme prevents replay attacks and supports creation, modification, and reading data stored in the cloud. Moreover, the authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. 1.INTRODUCTION Cloud computing is a promising computing model which currently has drawn for reaching consideration from both the educational community and industry. By joining a set of existing and new procedures from research areas, for example, Service-Oriented Architectures (SOA) and virtualization, cloud computing is viewed all things considered a computing model in which assets in the computing infrastructure are given as services over the Internet. It is a new business solution for remote reinforcement outsourcing, as it offers a reflection of interminable storage space for customers to have data reinforcements in a pay-asyougo way. It helps associations and government offices fundamentally decrease their financial overhead of data administration, since they can now store their data reinforcements remotely to thirdparty cloud storage suppliers as opposed to keep up data centres on their own. Numerous services like email, Net banking and so forth. are given on the Internet such that customers can utilize them from anyplace at any time. Indeed cloud storage is more adaptable, how the security and protection are accessible for the outsourced data turns into a genuine concern. The three points of this issue are availability, confidentiality and integrity. To accomplish secure data transaction in cloud, suitable cryptography method is utilized. The data possessor must encrypt the record and then store the record to the cloud. Assuming that a third person downloads the record, they may see the record if they had the key which is utilized to decrypt the encrypted record. Once in a while this may be failure because of the technology improvement and the programmers. To overcome the issue there is lot of procedures and techniques to make secure transaction and storage. User Privacy in Cloud Computing :User privacy is also required in cloud. By using privacy the cloud or other users do not know the identity of the other user. The cloud can hold the user accounts for the data in cloud, and likewise, to provide services the cloud itself is accountable. The validity of the user who stores the data is also verified. There is also a need for law enforcement apart from the technical solutions Anonymous authentication with Decentralized access control technique in clouds 1 CHEVULA REKHA, 2 Mr. SHABBIR HUSSAIN