Refined distributed replica’s with Improved reliability and security

Abstract

Data is the technique for eliminating duplicate copies of the data, and has been widely used in cloud storage
to reduce the storage space and also upload bandwidth. However, there is only one copy for each file stored in the cloud
even if such a file is owned by a huge number of users or many users. As a result, system improves the storage utilization
while reducing the reliability. Furthermore, the challenge of privacy for sensitive data is also arises when they are
outsourced by users to the cloud. Aiming to address the above security challenges, this paper makes first attempt to
formalize notion of the distributed reliable system. We propose the new distributed systems with higher reliability in
which data chunks are distributed across the multiple cloud servers. The security requirements of the data confidentiality
and tag consistency are achieved by introducing a deterministic secret sharing scheme in the distributed storage systems,
instead of using the convergent encryption as in previous systems. Security analysis demonstrates that is our systems are
secure in the terms of definitions specified in proposed security model. As the proof of concept, we implement proposed
systems and demonstrate that incurred overhead is very limited in the realistic environments.