Single Sign-On (SSO) is an authentication method that allows a user to log in once with a single set of credentials and gain access to multiple applications without being asked to log in again for each one.
Think of it like a hotel key card: you check in at the front desk once, and that one card opens your room, the gym, the pool, and the restaurant. You don’t re-verify your identity at every door.
How it works in practice:
- You log in to your company portal or Windows desktop.
- Your identity is verified by a central Identity Provider (IdP) — e.g., Active Directory, Google, or miniOrange.
- The IdP issues a secure token that proves your identity.
- Every app you open (email, CRM, HR tool, project management) validates that token silently in the background.
- You access everything without typing a password again.
The simplification for users:
- No password fatigue — one strong password instead of 10 weak ones.
- No repeated login screens during the workday.
- Fewer locked accounts and fewer helpdesk calls.
The simplification for IT:
- One place to manage who has access to what.
- Instant access revocation when someone leaves.
- Centralized audit logs for compliance.
