Data Security and Data Replication for Balancing the Server-side Memory Space

Now days we analysis the most important problem facing the any organization in cloud computing is data duplication, so this problem we analysis and avoid the reparative files/data on cloud storage based on different algorithm. The most important advantages of the file are minimum space required in cloud and avoid cloud size issue. We not only check the data duplication but also to protect the confidentiality of sensitive data while uploading the cloud server. To better protect data security proposed algorithm, on cloud storage. Secure data is can significantly reduce the communication and storage overheads on server side services provided by admin, and has potential applications in our big data-driven society. Existing data duplication technique are generally designed to the mobile application in the flash storage application ensure the efficiency and data availability, but not provide the better result in both conditions. In this proposed system we analysis the duplicate file on cloud storage also security apply using cryptography encryption technique. We use the data security using the advance encryption algorithm for encrypt the file that time we check the duplicate file using the hashing algorithm. Also we extend the system backup/recover option, server will i.e. local cloud provide the deleted file backup on requesting. This research paper gives the plain text (.txt file) as an input the system for checking the duplicate file using hash algorithm. We also use the key generation technique for user download the file for secure authorization.