Study finds 72% of undersea internet cables must fail to significantly disrupt Bitcoin nodes

A study first published in February and revised on March 12 by researchers at the Cambridge Centre for Alternative Finance finds that 72% to 92% of inter-country subsea internet cables would need to fail before more than 10% of Bitcoin nodes disconnect. The researchers also show that targeted attacks on cable chokepoints can be far more effective, while Tor-based routing now hides around 64% of nodes and improves the network's resilience. Analysis of 68 verified cable fault events from 2014 to 2025 indicates minimal impact on node connectivity and an almost zero correlation with Bitcoin's price.