Secure Deduplication Scheme for Cloud Storage

Nowadays, the explosive growth of digital contents continues to rise the demand for new storage and network capacities, along with an increasing need for more cost effective use of storage and network bandwidth for data transfer. As such, the use of remote storage systems is gaining an expanding interest, namely the cloud storage based services, since it provides cost efficient architectures. These architectures support the transmission, storage in a multi-tenant environment, and intensive computation of outsourced data in a pay per use business model. Security and privacy are among top concerns for the cloud environments. Towards these security challenges, This paper introduces a new cryptographic method for secure Proof of Ownership, based on the joint use of convergent encryption and the Merkle-based Tree, for improving data security in cloud storage systems, providing dynamic sharing between users and ensuring efficient data deduplication. Our idea consists in using the Merkle-based Tree over encrypted data, in order to derive a unique identifier of outsourced data. On one hand, this identifier serves to check the availability of the same data in remote cloud servers. On the other hand, it is used to ensure efficient access control in dynamic sharing scenarios. KeywordsCloud Storage, Data Security, Deduplication, Confidentiality, Proof of Ownership Mr.K.Venkatesh ASSISTANT PROFESSOR (Sr.G) SRM UNIVERSITY CHENNAI, INDIA