Authentication is the process of confirming your identity. It asks the question, 'Are you really who you say you are?'

Proving Who You Are

Authorization is the process of giving you permission to see or use certain things. It asks, 'Now that we know who you are, what are you allowed to do?'

What You Can Do

Identity verification always happens before permission is granted. You cannot be allowed into a system until the system knows who you are.

The First Step First

Showing your ID at security is like authentication to prove your identity. Your boarding pass is like authorization, showing which gate and seat you can enter.

The Airport Checkpoint Analogy

Passwords and PIN codes are the most common ways we prove our identity online. They are secrets that only the real user should know.

Common Digital Keys

Multi-factor authentication adds a second check, like a code sent to your phone. This ensures that even if someone steals your password, they still cannot get in.

Extra Security Layers

Some systems use your face or fingerprint to prove it is you. This is a very personal and secure way to unlock devices or accounts.

Your Digital Body Features

In many systems, people have different jobs like 'Admin' or 'Guest.' Your role determines which files you can read or edit.

Different Roles Different Access

The rule of least privilege means giving people only the specific tools they need for their job. This keeps the rest of the system safe if something goes wrong.

Only the Minimum Needed

Being 'unauthorized' means the system doesn't know who you are yet. Being 'forbidden' means the system knows you, but you do not have permission for that specific area.

Locked Out vs Forbidden

Single Sign-On lets you use one main account, like Google, to log into many different websites. This makes it easier to manage your identity in one place.

Sharing One Master Key

Systems often give you a temporary digital 'token' after you log in. This lets you stay active for a short time without re-entering your password every minute.

Authentication (AuthN) vs Authorization (AuthZ) Concepts