Large Data Access with Efficient Attributes Access Policy in Cloud Computing

How to management the access of the massive quantity of massive knowledge becomes a awfully difficult issue, particularly once huge knowledge are keep within the cloud. Cipher text-Policy Attribute primarily based coding (CP-ABE) may be a promising coding technique permits end-users to inscribe their knowledge below the access policies outlined over some attributes of knowledge customers and solely allows data customers whose attributes satisfy the access policies to rewrite the info[1]. In CP-ABE, the access policy is connected to the cipher text in plaintext type, which can additionally leak some personal info regarding end-users. Existing strategies solely partly hide the attribute values within the access policies, whereas the attribute names are still unprotected. During this paper, we have a tendency to propose Associate in Nursing economical and fine-grained huge knowledge access management theme with privacy-preserving policy[3]. In cloud computing environment, there are many users of cloud. They stores there data and accessing of large data stored on cloud. But this users face some of major issue causing loss of data in cloud and facing a problem in authority and privacy of users. Cipher text-Policy Attribute based Encryption (CP-ABE) is a promising encryption technique that enables end-users to encrypt their data under the access policies defined over some attributes of file and upload encrypted file with encrypted attribute with, key provided by attribute authority. Cloud consumers want to download any file so it only allow data consumers whose attributes satisfy the access policies to decrypt the data. In CP-ABE, the access policy is attached to the cipher text in plaintext form, which may also leak some private information about end-users. Existing methods only partially hide the attribute values in the access policies, while the attribute names are still unprotected, these issues are modify in this scheme to provide more security. In this scheme attribute authority assign public key to user while uploading files on cloud and also files secret key and private key to data consumer are used while uploading and downloading respectively.