The Growing Threat to Underwater Internet Cables: Are We Prepared?

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Rising Concerns Over Russian Activity

US officials are increasingly alarmed by heightened Russian movements around subsea cables, sparking fears of potential sabotage. These cables, essential to global internet connectivity, could become targets, particularly after Russian politician Dmitry Medvedev’s 2023 statement that Russia may no longer be restrained from attacking underwater communications infrastructure. This concern follows a series of suspected sabotage incidents, including the 2022 Nord Stream pipeline attack, and adds to the broader anxiety surrounding the security of this critical infrastructure.

Vulnerability of Subsea Cables

Subsea cables, which carry 95% of the world’s internet data, are vulnerable to low-cost attacks that do not require advanced technology. Experts like Christian Bueger from the University of Copenhagen warn that these cables, spanning 745,000 miles underwater, are easy targets for foreign governments. Tactics could include dragging an anchor across the cables or using undersea explosives and drones. Given the vast lengths of these cables and the lack of underwater surveillance, identifying such attacks is a significant challenge.

“Grey Zone” Attacks and Sabotage Tactics

A major risk with subsea cable sabotage is that it can be disguised as accidental damage, often referred to as “grey zone” activity. For instance, ships can turn off their automatic identification systems (AIS) and cut cables while pretending to be involved in fishing or other activities. This ambiguity complicates the process of distinguishing between accidental damage and intentional sabotage, making it difficult to pinpoint responsibility and respond appropriately.

Impact of Internet Blackouts and Regional Vulnerabilities

The risk of internet blackouts varies across countries depending on how many cable connections they have. Regions with fewer redundancies, such as the Azores, Ireland, and Malta, are more vulnerable to prolonged disruptions. Islands, in particular, face heightened risks due to their reliance on undersea cables without alternative land-based networks. In a scenario where cables are damaged, these areas could experience significant outages, especially without rapid repair responses.

Key Pressure Points for Coordinated Attacks

While a large-scale attack on multiple cables is unlikely, certain areas pose strategic vulnerabilities. For example, the Strait of Gibraltar and the Red Sea are critical junctions where many cables connect Europe, Asia, and Africa. If targeted, these pressure points could severely disrupt global internet traffic. Additionally, cables serving military bases may also be attacked to block intelligence surveillance systems, further complicating global security.

Legal and Regulatory Challenges on the High Seas

Enforcing international law on the high seas, where most subsea cables are located, presents another layer of complexity. According to the United Nations Convention on the Law of the Sea (UNCLOS), countries can only control waters up to 24 nautical miles from their shores, leaving large sections of the ocean without clear legal protection. This ambiguity makes it difficult to hold perpetrators accountable for cable sabotage, particularly when attacks occur far from national jurisdictions.

EU and NATO Responses to the Threat

In response to rising threats, the EU has taken steps to enhance the security of its subsea infrastructure. In 2023, the EU conducted “stress tests” with cable operators to better prepare for potential sabotage. Additionally, the EU is coordinating with NATO to improve the protection of critical undersea assets. NATO recently established a critical undersea infrastructure division, which will aid in deploying military forces to vulnerable areas when needed.

Balancing Security Initiatives with Efficiency

Though multiple security initiatives are being developed, experts like Bueger warn that there may be “too many” programs in play, potentially diluting the effectiveness of each one. The challenge is to ensure these initiatives are not overblown and remain focused on actionable outcomes. As governments, the EU, and NATO continue to ramp up protective measures, maintaining a balance between preparedness and over complication will be key to safeguarding the world’s internet infrastructure.


SOURCE: Ref Image from ISPI

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