Authentication vs Authorization: Who Are You, and What Are You Allowed to Do?
Authentication and authorization are closely related—but they solve two very different problems. Authentication is about identity. It answers the question: “Who are you?”
🔐 Authentication vs Authorization: Who Are You, and What Are You Allowed to Do?
Authentication and authorization are closely related—but they solve two very different problems.
Authentication is about identity.
It answers the question: “Who are you?”
Think of it as your entry pass to a party. To get in, you present something you know—like your email and password. During sign-up, apps collect these details and decide how users should prove their identity (email, username, PIN, biometrics, etc.).
But what if someone steals your login details?
That’s where Two-Factor Authentication (2FA) comes in. Now, knowing your password isn’t enough. The app also checks something you have—your phone, email, or authenticator app—by sending a one-time code (OTP). This extra step helps confirm that it’s really you.
Authorization comes after authentication.
It answers the question: “What are you allowed to do?”
You may be inside the app, but authorization decides whether you can view data, make changes, approve payments, or access admin features—just like being allowed to sit in certain sections of the party or access VIP areas.
In simple terms:
👉 Authentication gets you in.
👉 Authorization controls what you can do once you’re in.