Privacy Preservation and Integrity Auditing In Cloud Storage or Web Servers

Cloud is growing technology for enabling ondemand access to a shared pool of configurable server resources (applications, networks, memory, storage, processors and services) with infrastructure that can be rapidly provisioned and released with minimal management efforts. Cloud offers the promise of massive cost savings combined with increased IT agility due to different advantages like pay per use, resources flexibility, and geographical independence. However, this technology challenges many traditional approaches to hosting service provider and enterprise application design and management. Large number of enterprises and personal user’s use cloud services; however, storage security as a major problem to adopt cloud storage. User uploads data on server and use on demand or for the applications without keeping any copy on local machine. User can upload data on cloud servers without hassle to verify integrity or other security threats which can effect on data integrity. Hence, auditing process for cloud storage is important task to ensure data integrity. Normal users are not skillful for performing such auditing tasks. Also they are not aware about security risks and actions. So, to perform such audit user need to be dependent on the TPA (Third Party Auditor). He will check and verify that the data integrity on the cloud storage is maintained. TPA can be a physical system or a personal expertise with exuberant knowledge and highly capable handling such task. He audits the integrity of cloud storage and provides appropriate results to the user. Results contain removed, uploaded and modified files so that user can take appropriate actions. User has to make sure that privacy is preserved from TPA with minimal consumption of cloud resources while auditing process. In this paper, we proposed the system which checks and verifies the integrity of data without downloading files avoiding additional resources and vulnerability. Keywords— Auditing, Cloud, Cloud servers, Data integrity, Data privacy, Security, Storage.