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China is being blamed for a cyberattack on a US Navy contractor which has led to the theft of sensitive military information.

As reported by The Washington Post[1], US officials have claimed that up to 614 Gigabytes of information was stolen, including signal and sensor data, as well as submarine radio information relating to cryptographic systems.

Plans for supersonic missiles which are due to be utilized by US submarines by 2020 were also compromised during the attack.

However, the most critical datasets stolen relate to a mission called Sea Dragon. While little is known about the project, the US Defence Department has described Sea Dragon as research into "disruptive offensive capabilities" by "integrating an existing weapon system with an existing Navy platform."

As noted by The Drive[2], the Sea Dragon project[3] began in the 2015 fiscal year, resulting in in-water tests, ejection bodies, hardware development, and a successful land test.

However, no details on the project's status have been revealed since 2016 in budget documents beyond plans for a "sea-based tactical demonstration" by the end of the 2018 financial year.

An electronic warfare library was also reportedly compromised. If this is the case, hundreds of mechanical and software-based systems may have been placed at risk.

The cyberattack took place across January and February this year. The unnamed contractor that was targeted worked with the Naval Undersea Warfare Center[4], a research establishment in Newport, Rhode Island.

The New York Times reports[5] that the contractor was working on a Navy submarine and other underwater programs.

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