CP-ABE Based Encryption for Secured Cloud Storage Access

Database outsourcing to cloud storage servers is emerging trend among many firms and users. Cloud server stores the user data at various host Data centers, which are remotely located. Manyorganizations outsource their data management needs to an external service provider to relief the burden of storage management, universal data access with independent geographical locations, and avoidance of capital expenditure on hardware, software, personnel maintenance. While cloud computing makes these advantages more appealing than ever, it also brings new and challeng ing security threats to the outsourced data. Hence data owner does not have any control to ensure data security in host data centers. To ensure the data security and integrity in cloudstorage, until now, a large number of techniques have been proposed to address this problem, but all of them have their own inherent limitations. In this paper,Ciphertext policy attribute-based encryption (CP-ABE) is introduced a promising cryptographic solution to this issue. It enables data owners to define their own access policies over user attributes and enforce the policies on the data t o be distributed. This effectively eliminates the need to rely on the data storage server for preventing unauthorized data access and integrity. The performance and security analyses indicate that the proposed scheme is efficient to securely manage the data stored in the data storage servers.