Enterprise SSO Best Practices in 2026

Why SSO Matters

Single Sign-On (SSO) is the foundation of modern enterprise identity management. In this article, we cover:

Protocol Selection

• SAML 2.0 — best for enterprise SaaS, broad ecosystem support
• OIDC — modern, lightweight, mobile-friendly
• OAuth 2.0 — API authorization, not authentication
• CAS — academic environments, legacy adoption

Architecture Patterns

Centralized Gateway: A unified authentication proxy that handles all SSO traffic. Best for organizations with diverse application stacks.

Federated Identity: Each application independently validates tokens against a central IdP. Best for microservice architectures.

Security Checklist

• Always use PKCE for public clients
• Enforce short-lived access tokens (15-30 min)
• Implement token rotation and revocation
• Use HSM for signing key storage