Kmart says it has removed malware that had infected its checkout registers in stores. The company believes the malware may have been in place for about a month before it was detected. Rachel Murray/Getty Images hide caption

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Security expert Jose Molina discovered he could control "every device in every room" of a luxury hotel in China. Aarti Shahani/NPR hide caption

itoggle caption Aarti Shahani/NPR

After Grant Hernandez, an undergraduate security researcher at the University of Central Florida, hacked Nest, he programmed it to riff off a favorite line from the movie 2001: A Space Odyssey. Aarti Shahani/NPR hide caption

itoggle caption Aarti Shahani/NPR

Cybersecurity researcher Ruben Santamarta says he has figured out how to hack the satellite communications equipment on passenger jets through their Wi-Fi and in-flight entertainment systems. Andrea Comas/Reuters/Landov hide caption

itoggle caption Andrea Comas/Reuters/Landov

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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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

itoggle caption Lionel Bonaventure/AFP/Getty Images