Fullstack Javascript
Course Notes
08 - SSO (single sign on)
2. What is SSO?

2. What is SSO?

What is SSO?

  • Single Sign-On (SSO) is an authentication method that allows a user to log in once and gain access to multiple applications or services without needing to log in again for each one.
  • The main idea is that a user’s authentication credentials are managed centrally and shared across systems.

Why Use SSO?

  1. Convenience for Users:
    • No need to remember multiple passwords for different systems.
    • Faster access across services.
  2. Enhanced Security:
    • Reduces password fatigue, lowering the risk of weak or reused passwords.
    • Centralized authentication can implement strong security measures like MFA.
  3. Simplified IT Management:
    • Fewer password reset requests.
    • Centralized control over user access.
  4. Improved User Experience:
    • Seamless navigation across integrated systems.

Example: SSO in Action

  • Scenario: A company uses multiple tools for its employees: an email system, a project management tool, and a time tracking app.
  1. Without SSO:
    • Employees log in separately to each tool with different credentials.
    • They have to remember multiple usernames and passwords.
  2. With SSO:
    • Employees log in once through the company’s IdP.
    • The same login gives them access to all tools without further authentication.
    • This streamlines both security and user experience, making SSO a powerful tool for modern applications.