The hackers who breached the US Office of Personnel Management accessed a second set of even more highly sensitive data, it was widely reported Friday, in revelations that make the breach one of the biggest thefts of data on federal workers.
Investigators probing the compromise have "a high degree of confidence that OPM systems containing information related to the background investigations of current, former, and prospective federal government employees, and those for whom a federal background investigation was conducted, may have been exfiltrated," Samuel Schumach, a spokesman for the personnel agency, said in a statement to Bloomberg News Friday.
