Description

Cloud computing is ideal for places where the data remain in a fixed environment, which are unavailable. Cloud computing is a model where computing resources are rendered on rental basis with the use of clusters of commodity computers. In one of the services offered by cloud viz. Storage as a Service, users outsource their data to cloud without having direct possession or control on it. As the cloud service provider is not completely trustworthy, it raises issues such as data security and privacy. Existing system assumed cloud storage service providers or trusted third parties handling key management are trusted and cannot be hacked. Existing system introduce the concept of ABE in which data owners can embed how they want to share data in terms of encryption. The existing system had some drawbacks. It is impossible to encrypt unbounded message by one short key in non-committing schemes. In this project the system propose a new cloud storage encryption scheme. The proposed system based on Water cipher text policy attribute based encryption scheme (CP-ABE). The proposed system build a deniable CP-ABE scheme. The proposed system also used chameleon hash functions to make both true and fake message convincing. The decryption scheme which used in the proposed system is deterministic and it had no decryption error.