Looks like the Chinese have been busy hacking the OPM's database of those who hold security clearances.

And OPM hasn't told Federal employees that they have been hacked.

There is speculation that a confirmed compromise of Office of Personnel Management systems was executed by Chinese hackers. The attackers apparently wanted files on employees who have applied for top-secret security clearances. The New York Times broke the story Wednesday.

Federal officials say they have no proof personal data was exposed. It's possible there are no victims. It's also possible victims will be notified in several weeks or months, if the government’s track record on disclosure is any indication.

A month after the breach, a Government Accountability Office review found there are no specific requirements for agencies on how to determine whether the risk of data loss is great enough to warrant notification.
Things that make you go Hmmmmm....

See Should Feds Have Been Told About the OPM Hack? - Nextgov.com