Hackers illegally obtained access to user information on celebrities’ credit reports. Michelle Obama, Beyonce and Jay-Z among celebrities whose credit reports were posted online. TransUnion says thieves had all the data they needed to obtain user information. Identity fraud rose by 13 percent in 2011, with 11.6 million U.S. adults becoming victims, report says. Privacy experts say free credit reports often use public records for questions used to identify users, not more sophisticated systems, one expert says.”]