Research On The Data Integrity And Deletion In Cloud Storage

Cloud storage brought cheap, flexibility, scalability and big capacity to the public. Obviously a large number of data has been migrated to the cloud storage by most of Enterprises and users. Despite the benefits of cloud storage, there are still substantial security issues which do not exist for local storage. Some of these issues arise because customers may be unwilling or unable to trust cloud providers.If the data is stored in the remote server, the user can’t use local and traditional way verify the integrity of the data. When the user send a deletion commands to the cloud, the providers may not delete the data indeed. Even the user update the data every time, the providers may not cover the old data. This project will focus on the issue of ensuring the integrality of data and the issue of cryptographic deletion of data. The main work is as follows:1. After we studied the relevant programs and techniques, we presents a data integrity verification mechanism for the cloud. Our mechanism has a particular part hand in and support the operation of data block update. Then we analyzes the scheme of the performance.2. We studied the data deletion technology, and improve our verification mechanism to support data deletion. We also have studied multiple cryptographic schemes about data deletion. We proposed the deletion scheme based on authority and introduced in detail, finally analysis the scheme of safety.3. Finally we design a system which based of our data integrity verification mechanism and the study of the data deletion. The system can ensure the data integrity and protect the privacy about user data deletion.