Q: What can I do to be safe when using public Wi-Fi?
The convenience of accessing public Wi-Fi networks has become somewhat of an expectation when we鈥檙e away from our primary home and work connections, but it鈥檚 important to understand the risks.
Anytime you share a connection with strangers, whether it鈥檚 at an airport, on an airplane, in a coffee shop or at a hotel, anyone else on the network can use a variety of tools to capture the traffic floating through the network.
Rented space
Think of public Wi-Fi as a rented space like a hotel room, where you have no idea who else has access to your stuff. Leaving valuable items in your hotel room while you鈥檙e out has inherent risks, even though, in most cases, nothing bad will happen.
Using public Wi-Fi also has inherent risks, which are greater because of the ease in which compromises can occur. Any activity that requires you to type in a username and/or password is best avoided on any public Wi-Fi connection.
Man-in-the-Middle scams
While sharing a connection with strangers is a very real threat, a bigger threat is getting fooled into connecting to a rogue connection posing as a legit one. The off-the-shelf technology available to quickly set up a fake Wi-Fi connection runs less than $100 and fits in a shirt pocket.
Originally developed as an audit tool for IT administrators, these devices have been repurposed by cyber-thieves to set up the hard to detect Man-in-the-Middle scams. They connect to legitimate Wi-Fi connections and then mimic them or they鈥檙e setup as an alternative “free” connection in areas where users are generally required to pay.
Thieves know that everyone wants to connect to free Wi-Fi, so they will often call their connections “free Wi-Fi” in airports or in congested urban areas.
VPNs and private hot spots
If you鈥檙e a regular user of public Wi-Fi, you should consider installing a tool known as, or VPN, which will essentially make your data invisible while you鈥檙e connected.
The very best way to stay safe in public places is to use your own cellular connection by turning your smartphone into a hot spot. (Be sure you turn off the Wi-Fi first!) By tethering to your smartphone, you will be the only one on the connection, therefore bypassing the “stranger danger.”
Private hot spot issues
Two things to keep in mind if you are going to use your smartphone as your hot spot: battery life and your data plan.
I always find a power outlet whenever I turn on my smartphone鈥檚 hot spot because it鈥檚 a battery killer. And if you鈥檙e on a limited data plan, sharing your phone鈥檚 connection with your laptop or tablet can eat up your data in a hurry.
Another option, especially for frequent travelers with multiple devices, is to use a separate personal hot spot such as or . Both will have exponentially longer battery life as hot spots, so you won鈥檛 have to find a power outlet and they won鈥檛 eat into your smartphone鈥檚 data plan.
Ken Colburn is founder and CEO of . Ask any tech question on or .
