In 2015, the United States and China agreed to a digital truce that banned hacking private companies[1] to steal trade secrets. And though the agreement has been touted as a success, it hasn't stopped Chinese state-sponsored hackers from pushing the envelope[2] of acceptable behavior. Moreover, it certainly hasn't slowed types of hacking that fall outside the purview of the accord. Lately, it seems, that means defense intelligence gathering.

In recent weeks, Chinese hackers have reportedly breached a US Navy contractor that works for the Naval Undersea Warfare Center, stealing 614 GB of data about submarine and undersea weapons technology. Attacks in the last few months originating from China have also targeted US satellite and geospatial imaging firms, and an array of telecoms. The incidents highlight the clandestine but incessant hacking campaigns that continue reliably between the US and China.

"China’s actually backed off quite a bit on intellectual property theft, but when it comes to military trade secrets, military preparedness, military readiness, satellite communications, anything that involves the US’s ability to keep a cyber or military edge, China has been very heavily focused on those targets," says David Kennedy, CEO of the threat tracking firm Binary Defense Systems, who formerly worked at the NSA and with the Marine Corps' signal intelligence unit. "And the US does the same thing, by the way."

'They'll use that as a first step instead of having to send fighter jets or something.'

David Kennedy, Binary Defense Systems

The submarine contractor breach, recently reported by the Washington Post[3], reflects this intense focus on bridging any technological advantage the US may have. It involved attacks in January and February that nabbed important data, albeit from an unclassified network. When taken together, though, the information would

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