The same features that make free Wi-Fi hotspots desirable for consumers make them
desirable for hackers; namely, that it requires no authentication to establish a network
connection. This creates an amazing opportunity for the hacker to get unfettered access
to unsecured devices on the same network.
The biggest threat to free Wi-Fi security is the ability for the hacker to position himself between you and the connection point. So instead of talking directly with the hotspot, you're sending your information to the hacker, who then relays it on.
While working in this setup, the hacker has access to every piece of information you're sending out on the Internet: important emails, credit card information and even security credentials to your business network. Once the hacker has that information, he can — at his leisure — access your systems as if he were you.
Hackers can also use an unsecured Wi-Fi connection to distribute malware. If you allow file-sharing across a network, the hacker can easily plant infected software on your computer. Some ingenious hackers have even managed to hack the connection point itself, causing a pop-up window to appear during the connection process offering an upgrade to a piece of popular software. Clicking the window installs the malware.
As mobile Wi-Fi becomes increasingly common, you can expect Internet security issues and public Wi-Fi risks to grow over time. But this doesn't mean you have to stay away from free Wi-Fi and tether yourself to a desk again. The vast majority of hackers are simply going after easy targets, and taking a few precautions should keep your information safe.
Use a VPN
A virtual private network (VPN) connection is a must when connecting to your business through an unsecured connection, like a Wi-Fi hotspot. Even if a hacker manages to position himself in the middle of your connection, the data here will be strongly encrypted. Since most hackers are after an easy target, they'll likely discard stolen information rather than put it through a lengthy decryption process.
Use SSL Connections
You aren't likely to have a VPN available for general Internet browsing, but you can still add a layer of encryption to your communication. Enable the "Always Use HTTPS" option on websites that you visit frequently, or that require you to enter some kind of credentials. Remember that hackers understand how people reuse passwords, so your username and password for some random forum may be the same as it is for your bank or corporate network, and sending these credentials in an unencrypted manner could open the door to a smart hacker. Most websites that require an account or credentials have the "HTTPS" option somewhere in their settings.
Turn Off Sharing
When connecting to the Internet at a public place, you're unlikely to want to share anything. You can turn off sharing from the system preferences or Control Panel, depending on your OS, or let Windows turn it off for you by choosing the "Public" option the first time you connect to a new, unsecured network.
Keep Wi-Fi Off When You Don't Need It
Even if you haven't actively connected to a network, the Wi-Fi hardware in your computer is still transmitting data between any network within range. There are security measures in place to prevent this minor communication from compromising you, but not all wireless routers are the same, and hackers can be a pretty smart bunch. If you're just using your computer to work on a Word or Excel document, keep your Wi-Fi off. As a bonus, you'll also experience a much longer battery life.
Even individuals who take all the possible public Wi-Fi security precautions are going to run across issues from time to time. It's just a fact of life in this interconnected age. That's why it's imperative to keep a robust Internet security solution installed and running on your machine. These solutions can constantly run a malware scan on your files, and will always scan new files as they are downloaded. The top consumer security software will also offer business protection solutions, so you can protect yourself while you're out and about, and your servers back at the office, all at the same time.
Throughout any business traveller's life, there's going to come a time when an unsecured, free, public Wi-Fi hotspot is the only connection available, and your work simply has to get done right then. Understanding public Wi-Fi risks will ensure your important business data doesn't become just another hacking statistic.