International Journal of Computer Applications
Cloud computing is a recent technology for computing through a virtual environment. In cloud computing resources are provided virtually for computation, storage and developing application. To access these resources user will have to take an authentication from the cloud service provider. To get authentication user will have to provide some specification for its request i.e. time for which service is requires, its own details, qos required. Authentication to the user is provided in the form of license. License is a legal authorization to access the resources.