Data Possession Techniques in Cloud Storage for Deduplicating Data

Abstract

Data integrity and storage efficiency are two important requirements for cloud storage. Proof of Retrievability (POR) and Proof of Data Possession (PDP) techniques assure data integrity for cloud storage. Proof of Ownership (POW) improves storage efficiency by securely removing unnecessarily duplicated data on the storage server. The cloud storage service (CSS) relieves the burden for storage management and maintenance. Fragment Structure, random sampling and index table is used to construct the Audit service. These techniques are supported provable updates to cloud outsourced data. The third party auditing allow to save time and computation resources with reduced online burden of the user. In this work, a method based on Probabilistic query and periodic verification for improving the performance of audit services and also audit system verifies the integrity.