Certificateless Dynamic Data Integrity Verification using Lattices in Cloud Storage

Because of the data outsourcing in cloud, user loss his control and physical possession of the data. So, data integrity and security is a major problem in Cloud Storage. To solve this problem several Remote Data Integrity Checking (RDIC) schemes have been proposed, but most of them do not support the integrity verification over dynamically updated outsourced data. This paper, presents a Certificateless dynamic data integrity checking scheme using Merkele Hash Tree (MHT) data structure and Lattice based homomorphic linear signatures. MHT is an authenticated binary search tree used for block authentication to perform data update operations such as Modification, Insertion and Deletion. And, we apply Random masking technique to preserve the privacy against TPA. The experimental results of the proposed scheme are compared with the state-of-the art; they show the efficiency of the method.