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Is public Wi‑Fi safe? What a VPN protects

Public Wi‑Fi is convenient and, most of the time, fine. The risk is not that every cafe network is hostile; it is that you cannot tell which ones are. A VPN removes the question: whatever the network is, it sees only an encrypted stream to a server you chose.

What a network can see without a VPN

Most sites use HTTPS, so the content of your traffic is already encrypted. What the network still sees is where you go: the names of the servers you connect to, when, and how much data moves. On a shared network that list is visible to whoever runs the access point and, on a badly configured one, to other guests.

The second risk is a fake access point with a familiar name. Connect to it and you are talking to a stranger’s router. HTTPS still protects the content of most sites, but anything sent in the clear, and the list of where you go, is theirs.

What a VPN adds

With sNova on, the network sees one encrypted connection to a VPN server and nothing else. No server names, no list of apps, no clear-text traffic. A fake access point gets the same nothing. Sites you visit see the VPN server’s address rather than the cafe’s.

This is exactly the gap between HTTPS and full privacy on a network you do not control, and it is the reason to turn a VPN on before you check email at the airport.

What a VPN does not fix

A VPN does not stop phishing, does not check that the site you are typing your password into is genuine, and does not protect a phone without a passcode. Keep iOS updated, use a passcode, and be suspicious of any network that asks you to install a certificate or a profile.

It also does not make you anonymous. Once you log in to a site, that site knows who you are, VPN or not.

A short checklist for travel

Turn the VPN on before joining the network, not after. Prefer networks that require a password from the venue. Forget the network when you leave so the phone does not rejoin it automatically. With sNova, the first traffic is free, so there is no reason to skip it.

Questions

Do I need a VPN on hotel Wi‑Fi if the sites use HTTPS?

HTTPS protects the content; a VPN also hides which sites you visit and protects anything that is not HTTPS. On a network you do not control, it is worth the tap.

Does a VPN protect me on mobile data too?

Yes. On mobile data the carrier sees your traffic instead of a cafe; with the VPN on, it sees only the encrypted connection.

Will the VPN slow down public Wi‑Fi?

A little, because traffic takes one extra hop. On most public networks the network itself is the bottleneck, not the VPN.

Updated: 2026-09-08