Access Control on Cloud Technology: Access control is generally a policy or procedure that allows, denies or restricts access to a system. It may also identify users attempting to access a system unauthorized. Access Control allows one application to trust the identity of another application. The traditional model for access control is application-centric access control, where each application keeps track of its collection of users and manages them. So cloud requires a user centric access control where every user request to any service provider is bundled with the user identity and entitlement information.