Abstract

Cloud computing gives much more services to users on demand. In the public cloud, cloud is made up of various data centres and they are located in distributed manner. Therefore, unauthorized access can be made by many hackers who want to hack particular data. So that, to provide security in terms of data access, various access control mechanism are developed, that can be helpful in reducing unauthorized access. In this paper, the concept of public cloud infrastructure is used with cryptographic approach in order to provide a secure solution for securing the files on cloud yet maintains the confidentiality of data. Confidential files can be encrypted using randomized encryption and uploaded on cloud. Access Control methods ensure that authorized user’s access the data and the system. This system proposed a new extended architecture of constant size cipher text policy attribute based encryption which can resolve the security issues and data loss issues by using restriction policy. The implemented scheme shows that it is both efficient and flexible in dealing with access control for outsourced data in cloud computing with comprehensive experiments.