Enabling Public Audit ability and Data Dynamics for Storage Security in Cloud Computing

Cloud computing is the delivery of computing as a ser vice to the user rather than a product, where the shared resources, software and information are provided to com- puter and other devices as a utility over a network. Cloud computing is internet based computing whereby shared server provides resources, software and data to comput- ers and other devices on demand, as with the electricity grid. The application software and databases are trans- ferred to the centralized large data centers, in which management of the data and services may not be fully reliable or trustworthy. This unique paradigm brings about many new security challenges, which have not been well understood. These problems lead us to secure the data storage and data dynamics operation in cloud server. The cloud server checks correctness of the data in cloud server by using TPA (Third Party Auditor), this level authentication provides integrity checking on stor- age data. This paper achieves both public audit ability and dynamic operation by increasing the efficiency of data dynamics. The proposed method also improves the existing proof of storage models and block tag au- thentication.