International Journal of Computing Science and Information Technology (IJCSIT)
Proxy servers are the important thing the authors are using here to secure the data from untrusted users by assuming them(proxy servers) as trusted storage. Secure distributed data storage can shift the burden of maintaining a large number of files from the owner to proxy servers. Proxy servers can convert encrypted files for the owner to encrypted files for the receiver without the necessity of knowing the content of the original files. The original files will be removed by the owner for the sake of space efficiency.