Study Finds Bitcoin Network Highly Resilient to Random Cable Failures, But Vulnerable to Targeted Attacks

A new academic study from the Cambridge Centre for Alternative Finance has assessed Bitcoin's resilience against submarine cable failures, finding the network surprisingly robust under most disruption scenarios — but significantly more exposed when attacks are deliberate and targeted ^[1].

Researchers Wenbin Wu and Alexander Neumueller analyzed P2P network data spanning 2014 to 2025, alongside 68 confirmed cable fault events. Their findings indicate that between 72% and 92% of all inter-country submarine cables would need to simultaneously fail before more than 10% of Bitcoin nodes lose connectivity ^[1].

However, the picture changes sharply when attackers focus on critical cable chokepoints. The study describes such targeted disruption as "an order of magnitude more effective," with a failure threshold of just 5% to 20% of cables required to cause comparable damage ^[1].

The research also highlights that Tor routing — currently used to anonymize roughly 64% of Bitcoin nodes — actually strengthens network resilience, largely because Tor relay infrastructure is concentrated in European countries with highly redundant cable connections ^[1].

Among the 68 historical fault events examined, 87% caused less than a 5% reduction in active nodes, and cable outages showed virtually no correlation with Bitcoin price movements ^[1].