China has unveiled deep-sea cable-cutting technology that analysts warn could threaten the Internet's physical backbone. The Chinese-developed tool, initially presented as a civilian resource development device, has raised international concerns about its potential military applications. Wendy Chang of the Mercator Institute noted China's contradictory messaging about its role in submarine infrastructure.

During the Cold War, the US Navy secretly tapped Soviet cables using modified submarines, demonstrating the long history of undersea cable espionage. Both the US and Russia maintain capabilities to access these cables through nuclear submarines and robotic submersibles. Recent incidents involving ship anchors damaging cables highlight the vulnerability of this critical infrastructure.

The technology poses particular risks to Taiwan, which depends on 24 major cables for global connectivity, and Guam, home to US military bases. Chinese-flagged ships have already damaged cables in the Baltic Sea in 2023 and 2024, affecting multiple European nations. These incidents, combined with China's military pressure on Taiwan through maritime exercises, suggest the new tool could be used for strategic disruption rather than purely civilian purposes.