What a VPN is and when you need one

Cartoon

Dana is at a cafe, waiting for a friend. She wants to pay for her bus pass online and connects to the free Wi‑Fi. There are three networks, and their names look alike.

The network "Cafe_Lavender_FREE" was set up by a man at the next table. Whoever runs a network can see which websites you visit and can slip you a fake page instead of the real one.

Max: That’s what a VPN is for — a protected tunnel. Everything your phone sends travels in a sealed envelope to the other end of the tunnel. Whoever runs a stranger’s Wi‑Fi sees only the envelope, not what’s inside.

Dana: Oh, a free VPN right there in an ad! I’ll install it now.

Max: Stop! The tunnel leads to whoever owns the VPN. Now they see everything you do. If a VPN is free and nobody knows whose it is, you pay with your personal information: it gets sold, and sometimes passwords get stolen.

Max: Use a VPN only if you know whose it is. The most reliable one is your own: the tunnel leads to your own home router, the little box that gives you Wi‑Fi at home.

Dana: So wherever I am — a cafe, a train station, a hotel — my internet works as if I were at home. And nobody in the middle can peek.

Max: Just remember: a VPN protects the road, not you from crooks. If you give away a code from a text yourself or tap a fake link, a VPN won’t help. All the earlier rules still apply.

A VPN is not a magic button, it’s a safe road. What matters is that it leads to someone you trust.

Exercise: is it safe to connect like this?

Six situations on the road and at a cafe. For each one, decide: is it dangerous or not?

• Wi‑Fi "Free_WiFi_5G": «Dana wants to sign in to her bank and pay her rent.» — Dangerous. Nobody knows who runs a network like this. For banking, use mobile data or your own VPN.
• An ad in a game: «Free VPN forever! No sign-up, unlimited speed.» (super-free-vpn.top) — Dangerous. Nobody knows whose this free VPN is. Whoever runs it sees everything you do.
• Mobile data: «Greg is paying for a ticket in his bank app.» — Safe. Mobile data from your phone company is safer than a stranger’s Wi‑Fi.
• Hotel Wi‑Fi: «Kate checks her email from her hotel room.» — Safe. The tunnel leads to her own home. The hotel network sees only a sealed envelope.
• "Fast VPN Pro" app: «To make the VPN work, allow access to your text messages and contacts.» — Dangerous. A VPN doesn’t need your texts or contacts. With that access, someone can read the codes your bank sends.
• Wi‑Fi: «Connect to "Cafe_Lavender_FREE" because it says FREE.» — Dangerous. A look-alike name is a common trap. Ask the staff which network is the real one.

What to remember

• A VPN is a protected tunnel: a stranger’s Wi‑Fi sees only a sealed envelope, not what’s inside.
• But whoever owns the VPN sees everything. Free VPNs from ads are dangerous.
• The most reliable choice is your own VPN that leads to your home.
• A VPN won’t save you from scams: codes, links and calls still follow your usual rules.

Questions

What does a VPN do, in plain words?

• Sends everything in a sealed envelope through a protected tunnel
• Makes the internet twice as fast
• Protects you from every kind of crook

A stranger’s network sees the envelope, but not what’s inside.

Why is a free VPN from who-knows-where dangerous?

• It isn’t, since it’s free
• Its owner sees everything you do and may sell or steal your information
• It’s slow

The tunnel leads to whoever owns the VPN. If you don’t know them, you don’t know who is watching.

You’re at a cafe with no VPN, and you need to make a bank payment right away. What’s best?

• Connect to any free network
• Turn off Wi‑Fi and pay using mobile data
• Borrow a phone from the person next to you

Mobile data from your phone company is safer than unknown Wi‑Fi.

Your VPN is on. Is it now OK to read a code from a text to "the bank"?

• Yes, the VPN protects everything
• No: a VPN protects the road, not you from crooks
• Yes, if the call comes from the bank’s number

Every rule of this course still applies with a VPN.