Why Strangers Can't Read the Password You Just Typed 🔒🔑

Every password you type travels through dozens of strangers' computers. Not one of them can read it.

So how do you send a secret across a network of strangers and keep it secret?

When you see the padlock, your browser and the site run a trick called public-key encryption. The site hands out a public key, like an open padlock anyone can snap shut. Your browser uses it to lock a secret only the site's matching private key can unlock. With that delivered, both sides agree on a shared code. From then on, everything you send, passwords, messages, card numbers, is scrambled using that code. Everyone in between sees only noise, even though the locking key was public.

That's the strange genius of it. The key that locks your data is handed out openly. Only the key that unlocks it stays hidden. You can encrypt a secret with instructions anyone can see, yet no one but the destination can read it. Public lock, private key.

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