A Survey on Enabling Privacy for Secure Cloud Storage by Batch Auditing.

The Cloud computing is a newest technology which Provides various services through internet. Where users can remotely store their data into the cloud, User can upload their data on cloud and can access those data anytime anywhere without any additional burden. The User doesn’t have to worry about storage and maintenance of cloud data. But as data is stored at the remote place how users will get the confirmation about stored data. Hence Cloud data storage should have some mechanism which will specify storage correctness and integrity of data stored on a cloud. Thus, enabling public Auditability for cloud data storage security is of critical importance so that users can resort to an external audit party Third Party Auditor (TPA) to check the integrity of outsourced data when needed. Here the TPA can perform batch auditing, handling multiple audit on a single time so it reduces computation overhead. The Technique of bilinear aggregate signature is used to achieve batch auditing .The public key based homomorphic authenticator and uniquely integrate it with random mask technique to enable privacy for cloud data storage.