A new study from the Cambridge Centre for Alternative Finance finds Bitcoin’s peer-to-peer network is far more resilient to accidental undersea cable failures than many feared — but it remains vulnerable to targeted strikes on key chokepoints.
Researchers Wenbin Wu and Alexander Neumueller tracked 68 confirmed submarine cable fault events between 2014 and 2025 and modeled how those outages affected Bitcoin nodes at the country level using peer-to-peer network data. Their headline findings:
- 87% of cable failures knocked fewer than 5% of Bitcoin nodes offline.
- The short-term market impact was essentially nil: the correlation between cable failures and Bitcoin’s price was –0.02, a statistically insignificant relationship.
- For random cable outages, an enormous collapse would be required to meaningfully impact the network — between 72% and 92% of all submarine cables would have to fail before more than 10% of Bitcoin nodes went dark. (Subsea cables carry roughly 99% of international internet traffic.)
But the study also exposes a sharper danger: deliberate, targeted attacks on high-traffic cable junctions. When failures are focused on chokepoints, the threshold for serious disruption drops dramatically — to between 5% and 20% of cables — meaning well-planned cuts could inflict outsized damage compared with random outages. The authors describe this difference as roughly an order of magnitude in potency.
Additional takeaways:
- The post-2021 geographic redistribution of Bitcoin mining (after China’s crackdown) has not materially reduced this physical-infrastructure exposure. Network vulnerability tends to follow cable routes rather than miner locations.
- Tor usage provides a layer of obscurity: about 64% of reported Bitcoin nodes appear effectively hidden from outside observers through Tor, complicating efforts to map and target the network.
Bottom line: Bitcoin’s global node network shows strong resilience to stochastic, accidental undersea cable failures, but the system’s risk profile changes sharply under targeted physical attacks against a relatively small number of critical links. The paper — the first longitudinal academic look at Bitcoin’s dependence on undersea infrastructure — highlights that infrastructure topology, not just geographic miner distribution, will shape future threat assessments. The study was published in February by Wenbin Wu and Alexander Neumueller of the Cambridge Centre for Alternative Finance.
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