U.S. Warned About Security Weaknesses on Federal Computers

The inspector general at the Office of Personnel Management, which keeps the records and security clearance information for millions of current and retired federal employees, issued a report in November that essentially described the agency’s computer security system as a Chinese hacker’s dream. But by the time the report was published, Chinese hackers had already cleaned out tens of thousands of files on sensitive security clearances, and were preparing for a much broader attack that ultimately obtained detailed personal information on at least four million current and former government employees.