Attribute Based Access Control Scheme for Secure Cloud Storage

Abstract

Cloud computing allows user to remotely store their large amount of data into the clouds and can access when required. So here, security and privacy are very necessary terms in cloud computing.  Providing access to valid users is very important as much of the data can be sensitive.  This paper presents access control system for data stored in clouds that describes anonymous authentication and attribute based access control. In this scheme, the cloud first authenticates the user without knowing his/her identity before storing data in the cloud. This system has the feature of access control in which only authorised users can encrypt the stored information by using ABE (Attribute-Based Encryption) and paillier Encryption. Using this system user can upload his data securely in cloud, can update and can download at any time. This system is efficient as important data is stored securely. This system can be used for many applications such as storing health care information, in online social networking sites where users store their personal information and share with selected groups of users to whom they want to share. This system also handles user revocation when users are revoked from the system.