  In recent times cloud computing has appeared as a new model for hosting and
conveying services over the Internet. This model is striking to business
vendors as it eradicates the requirement for users to plan in advance, and it
permits the organization to start from low level and then add more resources
only if there is an increase in the service demand. Even though cloud computing
presents greater opportunities not only to information technology industry, but
every organization involved in utilizing the computing in one way or the other,
it is still in infancy with many problems to be fixed. The paper discusses
research challenges in cloud computing.
