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Opinion articles written in the style of their author. These texts are to be based on verified facts and must be respectful towards people, even though their actions may be criticized. All opinion articles written by individuals from outside the staff of EL PAÍS shall feature, along with the author’s name (regardless of their greater or lesser renown), a footer stating their office, academic title, political affiliation (if any) and main occupation, or the occupation related to the topic being assessed

Can Putin turn off the internet?

Over the last 20 years, Russia has invested heavily in systems capable of attacking the network of underwater cables that account for 95% of all online traffic

Workers deploy a submarine fiber optic cable between the German islands of Rügen and Hiddensee
Two workers lay out a fiber optic cable between the German islands of Rügen and Hiddensee, in February 2022.picture alliance (dpa/picture alliance via Getty I)
Moisés Naím

It’s easy to imagine the internet as an ethereal, immaterial phenomenon. We go about our days connecting to wireless networks and storing our data in the “cloud” assuming that our information is safe as it flows from one part of the world to another.

Unfortunately, most of these perceptions are wrong. The global network on which we depend so much is alarmingly physical and eminently vulnerable. According to Marshal Edward Stringer, former director of operations for the British Ministry of Defense, 95% of all international data traffic passes through a small number of undersea cables. We’re talking about roughly 200 cables, each the thickness of a garden hose and capable of transferring about 200 terabytes per second.

This very physical network processes some 10 trillion dollars’ worth of financial transactions every day. As Stringer explains, in the last 20 years, Russia has invested heavily in systems capable of attacking this network of underwater cables. The Kremlin today has a fleet of sophisticated unmanned submersibles designed specifically for this purpose. So does China. A wide raging escalation of Russia’s armed conflicts may well include an attack against the undersea cable systems.

This isn’t some hypothetical threat. As recently as October 2022, a submarine cable connecting the Shetland Islands to the rest of the world was severed at two points. A few days prior, a Russian “scientific research” ship was detected in the area. Unfortunately, it’s impossible to prove that Russia cut the cable. In fact, most of the time, outages are due to accidents with fishing boats or seismic events on the seabed. Even so, the coincidence greatly worried Western powers’ security agencies, which perceived the incident as a warning from the Kremlin. Another relevant event was the decision taken in February 2023 by China’s two largest telecommunications companies, which decided to withdraw from the international consortium that is developing an 11,930-mile (19,200 kilometer) network of submarine cables connecting Southwest Asia and Western Europe.

The impacts of a coordinated attack against these submarine cables would be incalculable. Such an attack would cripple global trade, banking and finance, telecommuting, not to mention the technology and communication industries as a whole and would likely trigger an instantaneous global recession. But the impacts would go far beyond that. Supply chains in the 21st century depend on the constant transfer of data to coordinate the delivery of goods and supplies. The interruption of this data flow would cause a domino effect of delays and failures, which would restrict the economic, political, and even cultural integration of different geographical areas.

Furthermore, the financial and economic crisis that this attack would precipitate would not even be the biggest problem. “Disconnecting” the cables of rival powers, would lead to an unmanageable crisis, especially if the responsibility could be attributed to a specific state actor, which could provoke conflicts and reconfigure alliances. Countries that rely heavily on digital infrastructure would be the hardest hit, while those with autonomous communication and technology capabilities would gain strategic advantages.

Such scenarios should not be ignored, especially because anarchy reigns on the high seas. Existing international treaties do not satisfactorily cover the case of submarine cables. This is emblematic of a global system that — despite being of critical public importance — is not adequately protected either physically or legally. Until now, maritime powers have refrained from attacking submarine infrastructure on a large scale. That’s because attacking an opponent’s cables and submarine connections would provoke costly retaliation. But the current equilibrium is unstable and inherently susceptible to disruptions that could destabilize the world system overnight.

When we imagine the events that could spark an escalation between the West and its rivals, we tend to forget this reality. Much like blood in the body, contemporary societies cannot function without the data circulating through the internet, which currently flows through an infrastructure that is extremely difficult to defend.

The West’s sense of invulnerability is illusory, and its rivals understand that certain infrastructure choke points — such as undersea cables — are its Achilles heel. This reality underscores the need to maintain minimally functional relationships on the international scene.

Interdependence between countries is not just a concept used by diplomats. It is a reality that defines the world today. This is a world in which problems, risks and threats become increasingly international while government responses remain predominantly national. There are problems that no country can solve alone. The need to coordinate our actions and collectively respond to threats is a challenge for which the world is not ready.


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