A Novel Scheme For Preserving Owner Privacy And Verifying Data Integrity Of Shared Data In Public Cloud Storage

Abstract

With the emergence of cloud Technologies, it is important review the integrity of the information that is saved on the public cloud storage systems. When critical and private information which is very sensitive in nature is saved and shared with many uses, it is very much important to safeguard the details of the data owner from the auditor. It means that the auditor should not be able to get any details about the data owner while he is auditing are reviewing the cloud data. Many schemes were proposed that safeguard the user privacy while incorporating the confirmable information possession technique. However, the issue with these schemes is that they have heavy computational cost and they increase the load on the systems and in turn bring down the efficiency. To address all the above mentioned problems, we propose a novel and unique technique to up all the data owner's privacy while auditing the data. The architecture of our proposed scheme is based on identity supported encryption and hence it overcomes the problem of management of certificates and ensures the relation between the data owner and the uploaded data are not exposed to the auditor by encrypting the data  in the proof generation phase but not in the auditing phase. The encryption is also done at block level to safeguard the data from untrusted Cloud Service Provider. In this manner, our scheme provides maximum security from the Cloud Service Provider and the auditor and hence the privacy and anonymity of data is preserved in this mechanism. Experimental results show that our mechanism is effective, efficient and implementable when compared to to the existing systems