SAML 2.0, OpenID Connect (OIDC) and OAuth2 are the best-known examples of authentication protocols. Decentralized identities (DID) cannot be recommended for general identity or authentication use at this time. The correct protocol for your use case will allow the overall system to operate securely with minimal effort and enable future expansion and compatibility with standards. The protocols discussed here cover SAML and OIDC, but because of its use in cases such as enabling users to sign in with a social provider such as Facebook or Amazon, it is included here.”]
Source: https://www.csoonline.com/article/3487596/4-authentication-use-cases-which-protocol-to-use.html