SAML and OAuth 2.0 serve different primary purposes in digital identity management. SAML focuses on authentication and web-based Single Sign-On, using XML assertions to verify user identity across enterprise applications. OAuth 2.0 is designed for authorization and delegated access, allowing third-party applications to access user resources without sharing credentials. While OAuth 2.0 alone cannot replace SAML for SSO, OpenID Connect (OIDC) builds on OAuth 2.0 to add authentication capabilities, creating a modern alternative suitable for mobile apps and APIs. The choice between SAML and OAuth 2.0/OIDC depends on specific use cases, with SAML remaining strong in enterprise environments and OAuth 2.0/OIDC preferred for modern applications and consumer-facing scenarios.
Table of contents
Understanding the Basics: Authentication vs. AuthorizationDeep Dive into SAML 2.0: The Enterprise Workhorse for SSOExploring OAuth 2.0: The Authorization FrameworkSAML vs OAuth 2.0: The Head-to-Head ComparisonCan OAuth Replace SAML for SSO? The Million-Dollar QuestionChoosing the Right Standard: Making the DecisionConclusion: Wrapping Up the Journey2 Comments
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