Free Wi-Fi in hotels, cafes, or airports may seem convenient, especially abroad or when mobile reception is poor, but security experts warn that public networks can be dangerously unsafe. The biggest risk is that attackers may set up a fake network with a name similar to the hotel or venue, tricking people into connecting without realizing it.
Once connected, criminals can try to monitor traffic, steal passwords, collect login details, and even reach credit card information or banking apps. The danger is highest when users log into bank accounts, make online purchases, or access other sensitive services over a public network. Even if a website itself is encrypted, an insecure network can still be used for impersonation attempts, redirects to fake sites, or other attacks.
A common mistake is allowing automatic connection to open Wi-Fi networks, which can cause phones or computers to reconnect to a suspicious network later without the user noticing. The advice is to avoid banking, entering card details, or carrying out other sensitive activity on public Wi-Fi, and to use mobile data instead.
If a public network must be used, users should verify the network name with the venue, use a reliable VPN, enable two-factor authentication on important accounts, keep operating systems and apps updated, and disable automatic connection to open networks. Free Wi-Fi may save a small amount on data costs, but one wrong connection can be far more expensive.
