Secure file access solution for public cloud storage

Cloud computing is a computing paradigm, where a large amount of systems are connected in private or public networks, to provide dynamically scalable infrastructure for application, data and file storage. It can be defined as a new style of computing in which dynamically scalable and often virtualized resources are provided as a services over the Internet. Cloud storage allows user to upload the application and download it. However, the users no longer have physical possession of the outsourced data, it formidable task to maintain the data integrity protection in cloud computing, especially for users having constrained computing resources. Moreover the user should not worry about the integrity of the data and should use the cloud storage. The user uses the Third Party Auditor (TPA) who verifies the integrity of the data and sends the result to the user upon the request. The user can access the data without the online burden of verifying it and use the data without any worries. The Trustworthiness of the TPA is verified so that the cloud user does not have any fear of sending the request to an untrusted entity. Moreover the localization of the error is specified such that the misbehaving server is identified such that the user can easily modify the data for further use if required.