Single Sign-On(SSO)

⭐ Explore Okta Single Sign-On (SSO)

🔐 1. What Is Okta Single Sign-On?

Okta Single Sign-On (SSO) provides:

  • A simplified login experience

  • Stronger security

  • Increased productivity

With SSO, a user authenticates once to Okta and gains access to multiple applications without re-entering credentials.

✔ How it works:

  1. User signs in to Okta with one set of credentials

  2. Okta authenticates the user

  3. User can access all assigned SSO-enabled applications

  4. No repeated login prompts unless required by policy

This reduces friction and eliminates password fatigue.

⭐ 2. Identity Federation

Identity federation allows a single identity (user account) to authenticate across multiple domains, systems, or applications without reauthentication.

It relies on a trust relationship established between:

  • An Identity Provider (IdP) → Okta

  • A Service Provider (SP) → Application

Once this trust exists:

  • Users log in to Okta

  • Okta sends a secure assertion/token

  • The application trusts Okta and grants access

This enables seamless access across systems.

⭐ 3. Okta-Supported Identity Federation Protocols

Okta supports multiple industry standards for federated SSO.

A. SAML (Security Assertion Markup Language)

  • XML-based protocol

  • Passes identity data from IdP → SP

  • Widely used for enterprise applications

  • The assertion contains authentication info & user attributes

B. OpenID Connect (OIDC)

  • Modern authentication protocol

  • Uses JSON Web Tokens (JWTs)

  • Built on top of OAuth 2.0

  • Often used by mobile and web apps

C. WS-Fed (Web Services Federation)

  • XML-based

  • Commonly used for legacy Microsoft services

  • Supports Office 365 (in classic deployments)

⭐ 4. What If an App Does NOT Support Federated SSO?

Some apps don’t support SAML, OIDC, or WS-Fed.

For these, Okta uses:

Secure Web Authentication (SWA)

A proprietary SSO method where Okta:

  • Stores the app username/password securely

  • Uses a browser plugin

  • Automatically fills and submits the login form

SWA is ideal for:

  • Older web apps

  • Apps without modern identity federation support

⭐ 5. Okta Integration Network (OIN)

The Okta Integration Network is a large catalog of prebuilt application integrations (SAML, OIDC, SWA, provisioning, etc.).

Benefits of OIN:

  • No custom development required

  • Faster and more secure integrations

  • Thousands of apps already configured

  • Reduces maintenance effort

How to access:

  1. Go to Admin Console

  2. Navigate to Applications → Applications

  3. Select Browse App Catalog

Each OIN app listing shows:

  • Supported SSO methods (SAML, OIDC, SWA)

  • Supported provisioning features

  • Admin instructions

This simplifies SSO deployment dramatically.

⭐ 6. Key Takeaways (Exam-Ready)

  • Okta SSO allows users to log in once and access multiple applications.

  • Identity federation enables trust-based authentication across domains.

  • Okta supports SAML, OIDC, and WS-Fed for federated SSO.

  • Apps without federation support can use SWA with secure form-fill.

  • The Okta Integration Network provides prebuilt app integrations.

  • Using OIN reduces complexity and accelerates SSO deployment.