Rapid and Efficient Privacy Preserving Public Audit Regenerative Code Cloud Based Storage

Abstract

Data integrity maintenance is the major objective in cloud storage. It includes audition using TPA  for unauthorized access. This work implements protecting the data and regeneration of data if someone  mishandles it. This job will be assigned to a Proxy server. The data of the users will be stored in public and  private area of the cloud. So that only public cloud data will be accessed by user and private cloud will  remain more secured. Once any unauthorized modification is made, the original data in the private cloud  will be retrieved by the Proxy server and will be returned to the user. Every data stored in the cloud will be  generated with a Hash value using Merkle Hash Tree technique. So modification in content will make  changes in the Hash value of the document as well. Proxy al so perform signature delegation work by  generating private and public key for every user using OEAP Algorithm so that the security will be  maintained. In our proposed we implement this scenario in a multi owner environment in which one  document will be access by user groups. In this context, the access limit should be properly maintained so  that no user for other group should be allowed to modify a particular group's data. Also, if any  modifications made in that data, it will be informed to the user as well by the proxy.