Ensuring file security on cloud using two-tier encryption and decryption

Abstract

Cloud computing is a model that offers incredible processing power and on-demand network access to a shared pool of configurable computing resources like networks,servers, storage, applications, and services. In the new era of the modern world, cloud computing has become a popular choice among the corporate structures and individual consumers. Information technology is undergoing a radical change because of cloud computing. With the increasing popularity of the cloud technology, security of information becomes much important in data storage and transmission. The cloud can't guarantee absolute data security, thus, there is a need to take safety measures for data protection at one’s own end. It is important to ensure that the stored data is neither compromised nor corrupted, thus making authentication and authorization for data access, a necessity. The proposed methodology suggests a new security scheme for the files to be uploaded on the cloud. The integrity and confidentiality is ensured by encrypting the data using a combination of two-tier hybrid encryption and the digital signature scheme and also, by providing access to the data only on successful authentication.