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If you use a free Wi-Fi connection in an airport, cafe, hotel or some other public space, you may be taking a big risk with your credit card information and other types of important data.
But the good news is there are steps you can take to secure your information.
"Once you start fresh, you can begin at the beginning," Siciliano said.
While most merchants, banks and credit card companies encrypt their websites so they are more secure than e-mail and social networks, hackers can use "cookies" from your e-mail and social network sites to potentially steal any credit card or other personal data.
That's a serious vulnerability for lots of people, but it's one that many busy consumers are willing to live with.
For example, if you've e-mailed credit card data, Social Security numbers or other personal information used to identify you in financial transactions, hackers can gain access to them through those e-mails.
The program's developer, Eric Butler, stated on his website that his intention was to convince websites such as Facebook, Twitter, Yahoo!
"Really make sure that you are careful about your Internet habits," Bower said.
"Don't just e-mail your credit card information, even if a hotel or merchant is asking you to do that." And, Bower says, be careful about which links you click because the links can download and launch malicious programs onto your computer.
Firesheep helps users capture a Wi-Fi user's "cookies" -- or Internet history tracking data -- and use those cookies to gain access to a user's sessions on e-mail and social networking accounts.
Capturing this data allows fraudsters to "sidejack" you, pretending they are you and gaining access to whatever information you've provided the site.
Experts say that's because anything that you'd do while you're connected is less secure than when you're logged in at home or at your office.Tags: Adult Dating, affair dating, sex dating