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Q.02 of 28

What's the difference between authentication and authorization?

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Authentication verifies "who you are" - confirming the identity of a user or system.

  • Examples: Username/password, biometrics, certificates

Authorization determines "what you can do" - granting or denying access to resources based on identity.

  • Examples: Role-based access control (RBAC), permissions, ACLs

Example flow:

  1. User provides credentials (authentication)
  2. System verifies credentials
  3. System checks user's permissions for requested resource (authorization)
  4. Grant or deny access based on permissions
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