AN OUTSOURCED PROOF OF RETRIEVABILITY FOR DYNAMIC DATA OPERATION IN CLOUD

Abstract

Cloud computing is popular, but has a dopted because there are many security and privacy problems. A problem found in cloud storage is, when clients outsource their data to the cloud storage servers, the clients do not know that their data is not damaged. Also the computational burden is too huge. To
tackle the challenge, OPoR a new cloud storage scheme involving a cloud storage server and a cloud audit server is proposed. The cloud audit server is allowed to pre- process the data before uploading to the cloud storage server instead of the cloud users. In a proof-of-retrievability system, a  data storage center must prove to a verifier that he is actually storing all of a client's data. OPoR outsources the heavy computation of the tag generation and eliminates the involvement of user. The proof of retrievability (PoR) model is strengthened to support dynamic data operations.