Politics | hackers Data Stolen in Latest Hack Goes Back 30 Years Reuters says it includes background checks from 1985 By John Johnson Posted Jun 6, 2015 7:58 AM CDT Copied This Feb. 24, 2015, file photo shows the Homeland Security Department headquarters in northwest Washington. (AP Photo/Manuel Balce Ceneta, File) Some of the personnel data stolen in the massive new federal hack predates the widespread use of computers—and hackers themselves. Reuters reports that the breach at the Office of Personnel Management involves security clearances and background checks dating back to 1985. That would explain that while 4 million people were affected, only about half of them are current federal employees. US authorities continue to blame China for the hack. "This means that they potentially have information about retirees, and they could know what they did after leaving government," says a defense official. He adds that the hackers could use the stolen information, including birth dates and Social Security numbers, to figure out passwords for other sites, including those involved with weapons systems. (Previous stories suggested that China is trying to build databases on Americans.) Read These Next Iran's supreme leader makes first public comments since ceasefire. New Fox star, 23, misses first day after car troubles. Her blood isn't compatible with anyone else's. Man accused of killing his daughters might be dead. Report an error