OpenID Connect (OIDC) is built on the top of OAuth 2.0 SSO protocol. It is a standardized, secure, flexible, and user-friendly SSO protocol that is well-suited for WordPress SSO in both web and mobile applications.
OIDC SSO supports multiple authentication flows, including authorization code flow with PKCE, implicit flow, and hybrid flow. This offers flexibility for different use cases and client types in WordPress single sign-on authentication.
WordPress Single Sign-On also provides additional security features such as encrypted ID token validation, introducing better protection against various security threats, such as token theft and man-in-the-middle attacks with the OIDC flow.