Data Integrity Verification in Hybrid Cloud Using TTPA

Abstract

Cloud computing is a growing technology in the field of IT enterprises that provides storage, compute and network resources as a service over the internet. It allows the user to move their application software and large databases to the data centres offered by multiple cloud service providers. Hence trusted enforcement of data and services out sourced on to cloud is a big challenging issue. In this paper we focus on the auditing mechanism in hybrid cloud using trusted Third Party Auditor (TTPA). Hybrid cloud is the one that connects public and private cloud and is useful when the dynamic scalability of service and data migration is needed. This resource expansion is required in the case of storage space limitation at private cloud, further to extend the outsourcing of data in public cloud. We propose a model in which the data is stored in private cloud, moves in to public cloud in case of storage expansion. In order to ensure the integrity and privacy of data, we utilize a Trusted Third Party Auditor (TTPA) to verify the correctness of the data stored in public cloud on behalf of the client. This enables public auditability of data. As a part of our work we carried out a remedy to attain a secure cloud storage services along with high secure data forwarding scheme among the cloud users. The Proposed code based scheme allows the user to verify the CIA (Confidentiality, Integrity and Availability) characteristics of the data with auditing mechanism. It guarantees strong cloud storage correctness, and also simultaneously predicts the misbehaving servers. This scheme is implemented on platform of Amazon web services, a universally accepted cloud vendor and the results are proven effective. This scheme works for all video, image, text files and supports dynamic operations also.

Investigation on storage level data integrity strategies in cloud computing: classification, security obstructions, challenges and vulnerability

“…The deployment setup of data integrity strategy is dependent on the environment of the proposed system. Clients can store their data in public cloud set up [98], multi-cloud setup [99,100] or hybrid cloud set up [101]. If data are placed in a public cloud setup, clients lose access control visibility on data due to the outsider data management policy of CSP.…”

Data Storage Integrity Checking with Efficient Privacy Preserving Model for Cloud

“…Several schemes and auditing protocols have been introduced for protecting the integrity of outsourced data [8][9][10][11][12][13][14][15][16][17]. Two schemes PDP [8] and POR [9] were introduced initially to cross check the integrity of outsourced data.…”

“…Wang et.al [14][15][16] focuses on privacy preserving, which is an important property during the verification process. An adversary alters the cloud data arbitrarily and is able to provide a strong and valid proof in order to pass the verification process.…”

“…The above graph is plotted between the size of the blocks and the communication cost incurred during auditing by sending and responding with proofs. As compared with the existing scheme [14], our scheme tries to achieve the minimum probability. The communication cost increases linearly as the no of blocks grows in size.…”