Secure sharing of data in cloud using MA-CPABE with elliptic curve cryptography

Abstract

The usage of data has grown exponentially well across prominent sectors in both public and private organizations. Security policies for the data are inevitable as data plays a major role even in prominent sectors like healthcare, defense. Accessing the data from the cloud is one of the easiest ways which is why most of the cloud service vendors pay more attention to secure the data on the cloud. Cyber criminals have been exploiting the cloud using various vulnerable methods and one among them is weak encryption methods. In order to solve these problems, some kind of new approach is needed and therefore cloud applications will be safer. The proposed secure sharing of data in the cloud using Multi-Authority Ciphertext Policy Attribute Based Encryption with Elliptic Curve Cryptography (MA-CPABE-ECC) is most appropriate for cloud since it has smaller key size, high security and less computation time. In the proposed work, the keys are generated based on the user attributes. Those keys are considered as points in elliptical curve and the encryption is performed so that greater security is achieved. Security analysis and performance analysis to the system was done and the results showed that we can achieve greater protection for cloud data transmission.