Friday, November 17, 2017
Business

Free public Wi-Fi can be disguised hacking tools

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From hotel lobby to coffee shop to airport terminal to park, each time we join a public Wi-Fi network, we put our personal information and privacy at risk. Yet few travelers are concerned enough to turn down free Wi-Fi. So, how to feed your addiction while also safeguarding your passwords and privacy? If you're not going to abstain, here are four rules for staying connected and (reasonably) safe while traveling.

1 MAKE SURE THAT ANY SITE YOU VISIT HAS 'HTTPS' IN FRONT OF THE URL.

Those five letters indicate the page is encrypted, preventing others from seeing what you're doing. If you're browsing the Web anywhere with an open network and you do not see "https," it's possible that someone there with nefarious intentions can see the site you're visiting and the exact pages you request on that site.

Sites like Gmail.com and Yahoo.com use "https" by default, but type your password into a Web-based email site that does not use it and a third party could see (and steal) that password. This sort of eavesdropping is easier than you might think. There are a number of tools that allow anyone who downloads them to see all the data that flies back and forth between a browser and a Web server, said Jason Hong, an associate professor at Carnegie Mellon University.

Moreover, anyone can set up a Wi-Fi network for criminal purposes and give it a name that sounds legitimate. Say, for example, you're in the Paris Metro and you join a free network that looks like an official city initiative. "You have no idea what Wi-Fi network that is," said Nadia Heninger, a professor at the University of Pennsylvania. "It could be set up by a hacker." And if he or she has malicious intentions, when you go to a popular site like Facebook, you could be logging into a fake page that allows the hacker to steal your password.

But, surely, using Wi-Fi at a hotel is safe, right? "That's only marginally better," Hong said. Even so, protect your computer by ensuring that your Web browsers are up to date. Turn on your firewall and turn off file sharing.

2 USE A VIRTUAL PRIVATE NETWORK. If you work for a corporation, chances are you either already have one or have access to a technology department that can give you one. Using a VPN essentially encrypts all your online traffic, ensuring that no one can eavesdrop.

Don't have a VPN? There's Tor, software that prevents third parties from seeing your location or the sites you visit. "It's totally free and fairly easy to use," said Heninger, who uses Tor. The software can be downloaded at Torproject.org.

3 SIGN UP FOR TWO-STEP VERIFICATION. More and more sites — Facebook, Twitter, Yahoo, WordPress — allow users to set up their accounts so that signing in requires two ways of proving who they are. The most common method requires a password you create plus a code that is sent to you — via text message or a special app — each time you wish to sign in.

For instance, let's say you logged onto a fake Facebook page and hackers captured your user name and password. If that happened without two-step verification (known on Facebook as "login approvals"), the hackers could access your account when you log off. If, however, you had enabled login approvals, even though your user name and password were captured, the hackers would not be able to log into your account because they wouldn't receive the requisite code.

4 BRING ONLY WHAT YOU NEED AND TURN OFF WHAT YOU'RE NOT USING. The latter goes for both Wi-Fi and Bluetooth. "It's just another way to be compromised," Heninger said. And don't give away your email address or download an app in exchange for free Wi-Fi.

"Think about the recipient of that information," she said. "You have no idea who set up that Wi-Fi network," she continued, adding "You might have just downloaded an app that will download all your contacts."

If you're seriously concerned about security, Heninger suggested creating a special travel email address and password. And she recommended buying a "travel laptop" loaded with only the information you need.

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