MLA scheme: Multi-level authentication for data in cloud using NTP-server and biometric

Cloud computing models are built over huge number of self-managed systems. Data owner, User and the Cloud service provider are the basic entities of those models and forms a crypto-cloud. Communication that happens between the entities leads to various security issues. Sensitive data which are on transmission and at rest paves ways for hackers. So, these data should always be kept confidential, should maintain its integrity and should be accessed by authenticated entities alone. Only authenticated entities are allowed to access and update the data stored in the cloud. This paper presents a novel approach to achieve authentication in multiple levels. Since single-level authentication leads to illegal access of data, this article presents a combination of password-based authentication, biometric and timestamp-based authentication using the NTP-servers.