What is the difference between SSO authentication and OAuth authentication?

Answer

Sure, here is a summary of the answer using bullet points:

SSO authentication and OAuth authentication are two different concepts that are often used together
SSO authentication is the process of verifying the identity of a user or device
OAuth authentication is the process of delegating authorization to another service or application
SSO authentication allows a user to sign in once and access multiple services or applications without having to enter their credentials again
OAuth authentication allows a user to grant permission to a third-party service or application to access their data or perform actions on their behalf, without sharing their credentials
SSO authentication and OAuth authentication can use different protocols and standards to implement their functionality
One common protocol for SSO authentication is SAML, which is an XML-based standard that exchanges authentication and authorization data between an identity provider and a service provider
One common protocol for OAuth authentication is OpenID Connect, which is an extension of OAuth 2.0 that adds support for identity verification and user information. OpenID Connect is a JSON-based standard that uses tokens to communicate authentication and authorization data between an authorization server and a client
Both SSO authentication and OAuth authentication can improve the security, convenience, and user experience of accessing online services and applications
However, they are not interchangeable or mutually exclusive. SSO authentication supports both authentication and authorization, while OAuth authentication only supports authorization. If the business priority is confirming user identity, SSO authentication is the only choice. If the business priority is allowing user delegation, OAuth authentication is the preferred choice. 1 2 3 4 5