A Comparative Study of Attribute-Based Encryption Schemes for Secure Cloud Data Outsourcing

In the digital era, Cloud data outsourcing attracts lots of attention for data storage, retrieval, and sharing. To ensure data security, Attribute-based Encryption has been suggested by various researchers. According to the researchers, ABE (Attribute-based Encryption) is the most assuring method for granting cloud data owners and users to access data in a convenient manner. A set of attributes becomes an identifier for the user or owner to access data. It also successfully assimilates encryption and access control for sharing secret data among groups. Non-efficiency and non-existence of the attribute revocation mechanism is the open problem in an Attribute-Based Encryption Scheme. The two classes of Attribute based Encryption mechanism, such as CP-ABE (Ciphertext-Policy Attribute-based Encryption) and KP-ABE (Key Policy Attribute-based Encryption) concepts are utilized to solve various data sharing security issues in a cloud environment. In this paper, researchers suggested techniques based on Attribute based Encryption for secure data sharing in Cloud has been studied and compared with appropriate performance metrics.