Target Co. estimates that at least 70 million individuals may have had information including their "names, mailing addresses, phone numbers or email addresses" stolen in a recent data breach. Joe Raedle/Getty Images hide caption

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Security Experts Say Data Thieves Are Getting Harder To Fight
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The logo and a page of mobile app "Snapchat" are displayed on tablets. Hackers broke into Snapchat, the popular mobile app, accessing the phone numbers and usernames of 4.6 million users and publishing them online. Lionel Bonaventure/AFP/Getty Images hide caption

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Owen Chilcoat hacking his tablet. "I am just messing around ... trying to break it," he says. Steve Henn /NPR hide caption

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Hacking Real Things Becomes Child's Play At This Camp
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The Toyota Prius, seen here at the New York International Auto Show in March, was one of the cars security experts Chris Valasek and Charlie Miller showed to be susceptible to attacks by hackers. Mike Segar /Reuters /Landov hide caption

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With Smarter Cars, The Doors Are Open To Hacking Dangers
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An image of the site promoting Def Con 21, a large annual gathering of hackers in Las Vegas. The meeting's leader is asking federal workers to stay away from this year's event. Def Con hide caption

toggle caption Def Con