Cloud computing is an expensive model for the on-demand network. Cloud Computing (CC) refers to the delivery of computing resources across the Internet, applications & services by which it can run on a spread across the network. This Network used for hosted services and virtualized resources delivered over the internetworking. Cloud Computing has three main categories (a) Virtualization– The network has no limit on resources, they are virtual. (b) Abstraction–The full details of software, which run on the physical system (c) Resource sharing - This facility is used for pay per what they used. There are three categories of Cloud Computing: (a) Infrastructure-as-a-Service (IaaS), (b) Platform-as-a-Service (PaaS) and (c) Software-as-a-Service (SaaS). The data stored on Cloud computing are safe and secure then only users will believe in this environment. Access Controls for a particular file and directory, Flex list Models, SLAs, etc. But still, there are few disadvantages in security. While user admittance data from Cloud Computing Authorization and Authentication are most important. In this paper the cloud issues are analyzed for providing a novel solution and deals with the authentication and authorization on Cloud Computing.

Keywords- Cloud Computing, Cloud Security, Authentication, Authorization;