• E.Supraja

Cloud computing is an information technology model that enables present access .Increasingly more and more organizations are opting for outsourcing data to remote cloud service providers almost unlimited amount of data by paying fees metered in gigabyte/month. For an increased level scalability, availability and durability .some customers may want their data to have an exact copy across multiple servers data centers. In this paper we propose a dynamic data possession (MB-PMDDP) scheme that has the following features .It provides evidence to the customers that the CSP is not cheating by storing fewer copies .It supports outsourcing of dynamic data .i.e, it supports block level operations such as block modification, insertion, deletion and append .It allows authorized users to continuously access the file copies stored by the CSP. We give a comparative analysis of the proposed MB –PMDDP scheme with a reference model obtained by extending existing provable possession of dynamic single –copy schemes. In addition, we show the security against colluding servers and discuss how to identify corrupted copies by slightly modifying the proposed scheme.

"EFFICINENT WAY OF INCREASING ASSISTANCE WITH MULTICOPY DYNAMIC DATA IN CLOUD COMPUTING ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.198-203, September-2018, Available :http://www.jetir.org/papers/JETIRE006033.pdf

"EFFICINENT WAY OF INCREASING ASSISTANCE WITH MULTICOPY DYNAMIC DATA IN CLOUD COMPUTING ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp198-203, September-2018, Available at : http://www.jetir.org/papers/JETIRE006033.pdf