Data Security Using Reliable Re-Encryption in Unreliable Cloud

Cloud computing is the innovative research area as it is the solution for next generation. One of the issue in cloud computing is data security. The Data owner stores encrypted data on cloud and issues decryption keys to authorized users.. Re-encryption prevents the left user to decrypting the data by using the old decryption key and to generate new decryption key to valid or authorized user only. So only authorized user can continue to access the data. By considering cloud architecture, such command may not be received properly due to unsecured network communications. In this paper, we have include the time base re-encryption scheme, attribute based encryption scheme (ABE) which able the cloud servers to automatically re- encrypt the data based on their internal clocks , users can access data within given time period.