The scene outside a Target store in Brooklyn on Black Friday, Nov. 29. Eric Thayer /Reuters /Landov hide caption
The New York Times' alternate site. http://news.nytco.com/ hide caption
Owen Chilcoat hacking his tablet. "I am just messing around ... trying to break it," he says. Steve Henn /NPR hide caption
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
Pirate Bay co-founders Gottfrid Svartholm Warg (left) and Peter Sunde arrive at Stockholm's city court in 2009. Bertil Ericson/Scanpix/AP hide caption
After high-profile accounts have been attacked — including AP's, NPR's and the BBC's — Twitter considers how to thwart hackers and protect users. iStockphoto.com hide caption
This 12-story building houses a Chinese military unit allegedly behind dozens of cyberattacks on U.S. and other Western companies. It's in a modern, if bland, part of Shanghai. Peter Parks/AFP/Getty Images hide caption
An analyst works at a federal cybersecurity center in Idaho in 2011. Experts say Internet-connected infrastructure is a possible target of cyberwarfare. Mark J. Terrill/AP hide caption
People walk past the Apple logo at the Apple Store at Grand Central Terminal in New York. Timothy A. Clary /AFP/Getty Images hide caption
Cyberattack headquarters? The 12-story building in a Shanghai suburb that American investigators say houses an operation responsible for hundreds of cyberattacks on companies around the world. Peter Parks /AFP/Getty Images hide caption