Why Public Wi-Fi Carries More Risk

Public networks in cafes, airports, and hotels are typically shared by many unrelated people at once, often without the protections a private home network has. Depending on the network's configuration, this can make it easier for someone else on the same network to intercept unencrypted traffic or attempt to access other connected devices.

Fake or 'Evil Twin' Hotspots

An attacker can set up a hotspot with a name deliberately similar to a legitimate one — 'Airport_WiFi' next to 'Airport Free WiFi,' for example — to trick devices into connecting to a network they fully control. Once connected, all unencrypted traffic passes through the attacker's equipment. Confirming the exact network name with staff before connecting is a simple way to reduce this risk.

Why HTTPS Matters More on Public Networks

Websites using HTTPS encrypt traffic between the browser and the site itself, which means even on a compromised or monitored network, the content of that traffic isn't readable in plain text. Nearly all major websites use HTTPS by default today, shown by a padlock icon in the address bar, but it's still worth checking for it before entering sensitive information on any site, particularly on public Wi-Fi.

What a VPN Does and Doesn't Solve

A VPN encrypts traffic between a device and the VPN provider's server, which protects it from anyone else on the local public network. It doesn't make browsing completely anonymous, since the VPN provider itself can typically see the traffic passing through it — which is why choosing a reputable provider with a clear, published privacy policy matters if using one specifically for public Wi-Fi protection.

Practical Habits for Safer Public Wi-Fi Use

  • Confirm the exact network name with venue staff rather than guessing from a list of similarly named options.
  • Avoid accessing banking or other highly sensitive accounts on public Wi-Fi when a cellular connection or personal hotspot is available instead.
  • Keep the device's firewall enabled and set the network type to 'public' when prompted, which applies stricter built-in protections.
  • Turn off automatic Wi-Fi connection to remembered networks, which can otherwise connect to a similarly named malicious network without any prompt.
  • Log out of sensitive accounts after use rather than leaving sessions open on a shared network.

Using a Personal Hotspot as an Alternative

Where available, using a phone's personal mobile hotspot avoids shared public network risks entirely, since the connection is private to that device and its cellular carrier. This is often a simpler and more reliable option than evaluating the trustworthiness of an unfamiliar public network.