From IB Times:
Chinese national-security officials may be using the data on American government employees collected during the U.S. Office of Personnel Management hack to identify spies in Beijing, according to a new report. The OPM hack compromised data on an estimated 21.5 million past and present government workers, including an unknown number of undercover spies who could soon spend the rest of their careers behind desks in Washington.
When it was first revealed last month that Chinese hackers spent 18 months lurking inside unsophisticated computer networks at the OPM, the Obama administration denied any data on American intelligence officials was at risk. Now, though, U.S. intelligence leaders and congressional officials have admitted there’s serious concern throughout Washington about what the Chinese government might find if it combines data obtained during the OPM hack with information gathered through other breaches.
“Chinese hackers spent 18 months lurking inside unsophisticated computer networks at the OPM”
The CIA is especially worried about American spies working in Beijing with diplomatic cover, sources told the New York Times.
“The information that was exfiltrated was valuable in its own right,” Rep. Adam Schiff, D-Calif., the top Democrat on the House Intelligence Committee, told the newspaper. “It’s even more compromising when it is used in combination with other information they may hold. It may take years before we’re aware of the full extent of the damage.”