Verifying Correctness of Trusted data in Clouds

Cloud computing has been conceived of tangible solution to the uprising storage economy of IT enterprises. Cloud computing is the long dreamed vision of computing as a utility, where users can remotely store their data into the cloud so as to enjoy the on-demand high quality applications and services from a shared pool of configurable computing resources. By data outsourcing, users can be relieved from the burden of local data storage and maintenance. However, the fact that users no longer have physical possession of the possibly large size of outsourced data makes the data integrity protection in Cloud Computing a very challenging and potentially formidable task, especially for users with constrained computing resources and capabilities. In this paper we propose a technique based on Metadata of the files, by using this metadata, we can verify the data that is stored by a user at remote storage in the cloud is not modified by the archive and Third party verifier. To perform cryptographic operations (encryption and decryption) required lot of computing power, but computation power is different for Personal computers, laptops and handheld devices, with this technique there may be a chance to reduce the number of cryptographic operations.