An Efficient Stream Cipher Based Secure and Dynamic Updation Method for Cloud Data Centre

Cloud computing infrastructure – an environment of pay-as per- use model, enhance accessibility, advance adaptability, and also a adaptable computational model to provide rapid modification as per the user’s requirement. At cloud data center, cloud service provider manages large database to attain these services with fast searching on low computation and introduces a concept of Virtualization-efficient partition of computing resources that reduces large number of servers. In spite of these excellence, cloud paradigm have some serious security and integrity concerns related to user’s data stored in VM’s disk at cloud data center. In this paper, we have proposed a scheme to handle security and integrity problems along with dynamic updation of user’s data by introducing Merkle B+ Hash Tree (MBHT) with short signature without random oracle, which has worst case transmission cost- O (log n). The proposed methodology makes the updating criteria strong enough over existing methodologies.