Cyberattacks sponsored by the Chinese government infiltrated a Navy contractor’s computers, allowing digital thieves to access sensitive data related to secret Navy projects on a submarine anti-ship missile. The information stolen was stored on the contractor’s unclassified network despite being of a “highly sensitive nature.”

According to a story in The Washington Post, 614 gigabytes of material on a closely held project known as “Sea Dragon” were taken. Contracted for the military organization Naval Undersea Warfare Center, Sea Dragon aims to develop a supersonic anti-ship missile for use by U.S. submarines.

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