Decoding VPNs

Mar. 2, 2024·2 min read·~/posts/decoding-vpns

VPNs are everywhere these days — ads, YouTubers, even non-tech-savvy folks asking if they need one. Here’s the honest version: a VPN is a tool, not a magic shield. It helps with privacy in specific ways, but it doesn’t make you invisible online.

How a VPN works

A VPN (Virtual Private Network) creates an encrypted tunnel between your device and a VPN server. Your traffic runs through that tunnel, so the networks in between — your ISP, the coffee-shop Wi-Fi — can’t easily see where you’re going.

It hides your IP. Websites see the VPN server’s address instead of yours.
It encrypts the first hop. Your traffic is scrambled between your device and the VPN server.

Think of it as a private courier for your data instead of dropping it at the local post office.

The part the ads skip

Here’s the catch nobody selling a VPN wants to dwell on: you’re not removing the middleman, you’re changing who it is. Your ISP can no longer see your traffic — but your VPN provider now can. You’ve moved your trust from a company you didn’t choose to one you did, which is only an upgrade if you pick a provider that genuinely doesn’t log. And a VPN does nothing about what a site learns once you’re there: log into an account and you’re identified, tunnel or not.

Where they’re actually useful

VPNs started in the enterprise and are still core there, even as a lot of organizations move toward zero-trust access. Consumer use has exploded on top of that.

Business:

Secure remote access for employees
Protecting sensitive data on untrusted networks
Reaching private internal resources from anywhere

Consumer:

Staying safer on public Wi-Fi
Reaching region-restricted content
Masking your IP for privacy or file-sharing

Choosing one

I use ProtonVPN , mostly because it comes with the Proton Suite I already rely on — convenient and reliable. If raw privacy and speed are the priority, Mullvad is my top pick: fast, no email required to sign up, and about as privacy-focused as it gets.

Whatever you land on, the deciding factor is the logging policy and who’s behind it. A cheap VPN with a vague privacy policy is just moving your data to a new owner.

Takeaways

A VPN doesn’t make you invisible online.
It’s a tool for encryption and routing — and for shifting trust to a provider you’d better actually trust.
Ignore ads promising total anonymity.
Pick one that fits your real needs, and use it wisely.