International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Now-a-days, more and more users store their important data in cloud. To ensure the security of the remotely stored data, users need to encrypt important data. From the point of data security which has always been important aspect of quality of service, cloud computing cause's new challenging security threats. Identity-based proxy re-encryption schemes have been proposed to shift the burden of managing numerous files from the owner to a proxy server. The existing solutions suffer from several drawbacks. First the access permission is determined by the central authority, which makes the scheme impractical.