What is Single Sign-On in simple terms?

SSO lets you log in once and access all your work applications without typing your password again. One login, many apps.

Is SSO more secure than regular passwords?

Yes, when implemented correctly. SSO reduces password fatigue, makes it easier to enforce multi-factor authentication, and gives IT a single point to revoke access when needed.

What happens if the SSO provider goes down?

Users cannot log in to connected applications during an outage. This is why choosing a reliable identity provider with high uptime guarantees (99.9%+) is critical. Some setups include fallback authentication for essential services.

What is Single Sign-On (SSO)?

How Single Sign-On Works

Single Sign-On (SSO) is an authentication method that lets users log in once and access multiple applications without entering credentials again. You probably use SSO every day without thinking about it. When you sign in to Google and then open Gmail, YouTube, and Google Drive without logging in again, that is SSO.

The technical flow is straightforward. When you try to access an application, it redirects you to a central identity provider (IdP). You authenticate there once. The IdP then issues a token that proves your identity. Every other connected application accepts that token instead of asking for a separate password.

Common SSO Protocols

SAML (Security Assertion Markup Language) is the enterprise standard. It uses XML-based assertions and is widely supported by corporate applications like Salesforce, Microsoft 365, and SAP. If you are connecting internal business tools, SAML is likely your path.

OAuth 2.0 and OpenID Connect (OIDC) are the modern web standards. OAuth handles authorization (what you can access), while OIDC adds an identity layer on top (who you are). Most consumer-facing applications and SPAs use this combination.

Why SSO Matters for Your Business

Security improves because users have fewer passwords to manage. Fewer passwords means fewer weak passwords, fewer sticky notes on monitors, and fewer password reset tickets. When an employee leaves, you disable one account instead of hunting down credentials across 15 different tools.

Productivity gains are immediate. The average employee logs in to applications 10+ times per day. SSO eliminates that friction. IT support tickets related to passwords drop by 30-50% in most organizations after SSO deployment.

Implementing SSO

Start by inventorying which applications your team uses and which SSO protocols they support. Choose an identity provider: Azure AD, Okta, Auth0, and Keycloak are popular options. Azure AD makes sense if you are already in the Microsoft ecosystem. Keycloak is a strong open-source choice for custom setups.

Then connect each application to your IdP. Most SaaS tools have SSO configuration guides. Custom applications need integration work, typically using OIDC libraries for your tech stack.

We build SSO into the custom systems and portals we develop for clients. Whether you need to integrate with an existing identity provider or set up SSO from scratch, contact us to discuss your authentication requirements.

How Single Sign-On Works

Common SSO Protocols

Why SSO Matters for Your Business

Implementing SSO

Frequently Asked Questions