 SAML and OAuth 2.0. Do you know the difference? SAML is used to authenticate a user or prove its identity to the service. OAuth 2.0 is used for a delegated authorization. SAML supports single sign on, which means you can sign into one application and use that to sign into other applications without having to sign in multiple times. OAuth 2.0 is for authorization or allowing an application to get access to resources on a different application. For example, giving LinkedIn access to your Gmail contacts. Sometimes OAuth 2.0 is forced into authentication, but OAuth 2.0 by itself does not support single sign on. SAML is typically used for single sign on in government and enterprise applications. These are scenarios when high security and high productivity are required. And OAuth 2.0 is widely used for consumer and enterprise applications. This has been Identity in a Minute.