Does a VPN protect me on public Wi-Fi?
Also asked as: Is a VPN needed on public Wi-Fi? · Is hotel Wi-Fi safe with a VPN?
Direct answer
Yes, against the threats public Wi-Fi actually poses. Anyone on the same network can watch unencrypted traffic and can run a fake access point with the venue's name; a VPN encrypts everything to one server before it leaves your device, so both see only ciphertext. It does not protect you from a malicious site you then visit.
What goes wrong on public Wi-Fi
Three things. Other devices on the network can see unencrypted traffic and the domains you resolve. A fake access point — an evil twin — with the café's name can sit between you and the internet and read or alter what passes. And the network's own DNS can be hijacked to send you to the wrong server. HTTPS covers a lot of this for websites; it does not cover DNS, apps that still use plain HTTP, or the metadata of where you connect.
What the VPN does about it
With the tunnel up before you open anything, every packet is encrypted to the VPN server, including DNS. The network, the evil twin and the hijacked resolver all see one encrypted stream to one address. The tunnel's own keys are authenticated, so a fake access point cannot impersonate the server.
What it does not do
It does not vet the sites you visit, stop phishing, or block malware. And it only helps if it is on: connect first, then browse. VPNmine's apps can connect in one tap on a phone, a laptop or a TV, and the account is optional, so there is nothing to set up at the gate.
Related questions
- Why should I use a VPN?The reasons a VPN earns its place: untrusted Wi-Fi, keeping browsing off your ISP's record, and appearing in another country. And the reasons that are myths.
- Is a VPN safe?A VPN is as safe as the provider behind it. What decides it: who runs the servers, what is logged, how the service makes money, and whether you can leave.
- How does a VPN work?What happens when you press connect: key exchange, encrypted tunnel, a server that forwards your traffic, and why sites see its address, not yours.
- Can my ISP see that I use a VPN?Your ISP can see that you are connected to a VPN server, how much data moves and when. It cannot see the sites, the lookups or the content. What that means.