Public Wi-Fi gets a bad reputation, and some of it is deserved. But not all risks are equal, and understanding what's actually dangerous helps you make informed decisions rather than avoiding it entirely.
The Real Risks on Public Wi-Fi
Evil Twin attacks are the most serious modern threat. A criminal sets up a hotspot named "Cafe WiFi" or "Airport Free WiFi" — identical to the real network name. Devices connect automatically. All traffic goes through the attacker's equipment first.
Unencrypted HTTP sites send data in plain text. Anyone on the same network can read it. This was a massive problem in 2015 but is less relevant now — the vast majority of sites use HTTPS, which encrypts traffic even on public Wi-Fi.
Session hijacking involves stealing session cookies from unencrypted connections to impersonate you on websites. Again, HTTPS largely prevents this.
What's Not Really a Risk Anymore
Bank login credentials are safe on public Wi-Fi if the site uses HTTPS (look for the padlock). Your banking app also encrypts its own traffic. The "hackers reading your bank password" scenario from 2010 is largely obsolete on modern HTTPS sites.
Practical Steps
Check for the padlock icon on any sensitive site. Avoid auto-connecting to open networks — turn off "Connect Automatically" for any saved open Wi-Fi networks. Use a VPN if you regularly work on sensitive business systems from cafes. Never do banking from an unknown unsecured network if you can avoid it.
The Forgotten Threat: Data Charges
The most practical reason to be careful with public Wi-Fi isn't hacking at all — it's the risk of a malicious captive portal stealing your email address, or accidentally connecting to a pay-per-use network and incurring charges.