The following information helps you understand what OAuth is and how to create an OAuth application in Single Sign-on. In the Single Sign-on environment, an application is an object that contains all of the necessary items to create a federated connection to an external service that supports single sign-on connections. A federation connection establishes a trust between Single Sign-on and a service. A service is an application, service, or resource that you want to provide a single sign-on experience to for your users.
Single Sign-on supports OAuth 2.0.