Chinese govt hackers stole US military data: American officials

China's Shenyang J-31 stealth fighter (left) in a test flight. An F-35 stealth fighter (right) in action. Reports prepared for the Pentagon say that over the years, the Chinese have stolen designs for the F-35 joint strike fighter and the advanced Pa
China's Shenyang J-31 stealth fighter (above) in a test flight. An F-35 stealth fighter in action. Reports prepared for the Pentagon say that over the years, the Chinese have stolen designs for the F-35 joint strike fighter and the advanced Patriot PAC-3 missile system, among others.PHOTOS: REUTERS, AGENCE FRANCE-PRESSE
China's Shenyang J-31 stealth fighter (left) in a test flight. An F-35 stealth fighter (right) in action. Reports prepared for the Pentagon say that over the years, the Chinese have stolen designs for the F-35 joint strike fighter and the advanced Pa
China's Shenyang J-31 stealth fighter in a test flight. An F-35 stealth fighter (above) in action. Reports prepared for the Pentagon say that over the years, the Chinese have stolen designs for the F-35 joint strike fighter and the advanced Patriot PAC-3 missile system, among others.PHOTOS: REUTERS, AGENCE FRANCE-PRESSE

Breach involved sensitive navy data related to undersea warfare

WASHINGTON • Chinese government hackers have compromised the computers of a US navy contractor, stealing massive amounts of highly sensitive data related to undersea warfare - including secret plans to develop a supersonic anti-ship missile for use on US submarines by 2020, according to American officials.

The breaches occurred in January and February, said the officials, who did not want to be named.

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A version of this article appeared in the print edition of The Sunday Times on June 10, 2018, with the headline 'Chinese govt hackers stole US military data: American officials'. Print Edition | Subscribe