login

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Flat illustration of a person holding a key up to a friendly locked door with a small window, a checkmark glowing inside

What is login, actually? How an app knows it's you

Lesson 1 of who are you: logging in doesn't prove you're you. It proves you hold something only you should have. What the app actually checks, and what it starts.

Sam Ortega · 1h ago · 4 min