What are SAML and OIDC? How do they enable SSO for cloud apps?

What are SAML and OIDC? How do they enable SSO for cloud apps?

• A. SAML is an XML-based token standard; OIDC is OAuth 2.0 with an identity layer using ID tokens; both enable single sign-on across apps and services.
• B. SAML and OIDC are network protocols for data transfer; they enable file sharing.
• C. SAML is a type of firewall; OIDC is a VPN protocol; both enable secure access.
• D. SAML and OIDC are database authentication methods.

Answer: (A)

SSO with cloud apps relies on a trusted identity provider to handle authentication and issue tokens that other apps can trust. SAML and OIDC are two standards that enable this federated sign-in. SAML is an XML-based standard that uses security assertions. When you try to access a cloud app, you’re redirected to the identity provider. After you verify your credentials, the IdP issues a SAML assertion—a signed statement about who you are and your attributes. The cloud app (the service provider) validates that assertion and, if valid, creates a session for you. Because multiple apps trust the same IdP, you can sign in once and gain access to many apps without re-entering credentials. OIDC, OpenID Connect, sits on top of OAuth 2.0 and adds an identity layer by issuing ID tokens (typically JWTs) that convey who you are. The process is similar: you authenticate with the IdP, and the relying apps receive a token they can validate to establish your identity and a session. OIDC is particularly well-suited for modern web and mobile apps and API access, thanks to its JSON-based tokens and streamlined flows. In both cases, the common thread is a trusted IdP issuing tokens or assertions that multiple cloud apps accept, enabling seamless single sign-on across those apps.

SSO with cloud apps relies on a trusted identity provider to handle authentication and issue tokens that other apps can trust. SAML and OIDC are two standards that enable this federated sign-in.

SAML is an XML-based standard that uses security assertions. When you try to access a cloud app, you’re redirected to the identity provider. After you verify your credentials, the IdP issues a SAML assertion—a signed statement about who you are and your attributes. The cloud app (the service provider) validates that assertion and, if valid, creates a session for you. Because multiple apps trust the same IdP, you can sign in once and gain access to many apps without re-entering credentials.

OIDC, OpenID Connect, sits on top of OAuth 2.0 and adds an identity layer by issuing ID tokens (typically JWTs) that convey who you are. The process is similar: you authenticate with the IdP, and the relying apps receive a token they can validate to establish your identity and a session. OIDC is particularly well-suited for modern web and mobile apps and API access, thanks to its JSON-based tokens and streamlined flows.

In both cases, the common thread is a trusted IdP issuing tokens or assertions that multiple cloud apps accept, enabling seamless single sign-on across those apps.