Abstract: “This paper, proposes an efficient way to secure the data and file in cloud server. Basically in cloud server when data is stored it is not sure whether the data is having security or not. This concept drastically reduces the communication and storage overhead as compared to the traditional replication based file distribution techniques. By utilizing the IP address restriction with data and providing key to distributed data which is stored on cloud server, whenever data corruption has been detected during the storage correctness verification, our scheme can almost guarantee the simultaneous localization of data errors, i.e., the identification of the misbehaving server(s). These scheme further supports secure and efficient dynamic operations on data blocks, including: data update, delete and append. This methodology ensure the data security on cloud computing so that any hacker cannot use the others data or download. On this paper the restriction is been done by IP address and key to ev”

Keywords: Byzantine failure, IP address restriction, distributed scheme, cloud.