An Efficient and Secure Data Deduplication Scheme for Cloud Assisted Storage Systems with Access Control

Cloud storage helps clients reduce the burden of data management and storage, attracting more data owners to keep their private information on the cloud. Among the massive amounts of confidential information that are being created rapidly nowadays, storage efficiency has become a primary concern for reliable data deduplication. Numerous deduplication algorithms have been developed to minimize storage requirements and network traffic, but those schemes are not efficient in real life. Besides, they also lack access control as cloud service providers manage most of the operations. We propose a deduplication architecture that combines access control with convergent encryption to ensure the confidentiality of data uploaded to the remote server along with the encryption keys. We use the SHA-256 hash function with Proof of Ownership (PoW) to achieve data integrity and authenticate users for secure deduplication.