Secure and efficient public auditing scheme for cloud storage

Cloud computing offers storage as a service to users where data is maintained, managed, backed up remotely. It is also made available to users over the internet. The data integrity of the stored data at cloud is the main concern of the users, because it is possible that the stored data on a cloud can be attacked, modified or damaged by outside attackers or hackers. Data auditing is a new concept introduced to perform the data integrity check using an entity called Third Party Auditor (TPA). The main goal of this work is to develop a secure and efficient auditing scheme with the capabilities such as privacy preservation, confidentiality, and data integrity. In the proposed system, cloud server is used only to save the encrypted blocks of files. No additional burden of verification computing is provided on it. All the task for the scheme is performed by the TPA and data owner. The proposed auditing scheme is evaluated considering different parameters. The proposed method satisfies all the requirements as well as it reduces cloud server burden. In future, data dynamics operations such as updation, deletion and insertion of data would be performed.