How Does Lesson 9: Passwords and Hash Functions Work?

A password is like a secret key that lets you enter a special place, and a hash function is like a magic machine that turns your password into another secret code.

Imagine you want to play on your favorite game app. You pick a password, say "apple123". The app doesn’t remember the password itself, it uses a hash function to turn it into something else, like "7x9z4b".

Now, every time you try to log in, the app takes your password and runs it through the same machine again. If the new code matches the one it saved earlier, you get to play!

It’s like having a special lock on your toy box. You don’t need to remember the exact key, just that it fits the lock.

A hash function is like a recipe. It takes your password and follows the same steps every time. Even if two people choose different passwords, their final codes can look completely different.

This makes it really hard for someone else to guess your password, even if they know what code you ended up with!