A LIGHT WEIGHT SECURE DATA SHARING SCHEME IN CLOUD COMPUTING

Abstract

Ciphertext Policy – Attribute Based Encryption is used to share the data securely as it is a challenge because it is an emerging encryption technology and can be very useful used over the cloud platform. The CP-ABE scheme has been implemented over the setup of a typical university architecture and gives the fine grained access for it. The documents that are sent to the data users by the data owners are encrypted first with the ABE encryption and following the access control structure on that document and then it can be decrypted when the data users wants them and only for those users the file will be decrypted whose attributes will be matched according the access control structure. The satisfaction of the attributes will only gives the permission to the data user to view the file. Experimental setup has been made and it is shown how the file is encrypted according to the file access policy and then the decryption setup is made for the data users. Also the encryption/decryption depends on the number of attributes, size of the file and the type. The ABE encryption can be implemented over the cloud and it can be very useful for the data owners. The user will only be access to the data only if its credentials or attributes are matched. The method doing this that was implanting the server with this and be made but we are compromising as we cannot trust the servers. So by our technique the data can be kept over the server confidentially as it is trusted or not. By CP-ABE the trust factor of the servers are also solved as we are not depending on them by this.