International Journal of Scientific and Research Publication (IJSRP)
A cloud storage system, consisting of a collection of storage servers, provides long-term storage services over the Internet. Storing data in a third party's cloud system causes serious concern over data confidentiality and to reduce data management costs. However, the authors must provide security guarantees for the outsourced data. They design and implement a secure cloud storage system that achieves fine-grained, policy-based access control file assured deletion and secure data forwarding to specified users. It associates outsourced files with file access policies, assuredly deletes files to make them unrecoverable to anyone upon revocations of file access policies.