Just came across some research from Cambridge that's pretty eye-opening about Bitcoin's infrastructure vulnerabilities. Turns out 95% of Bitcoin nodes could potentially be compromised through coordinated attacks targeting underwater internet cables - the physical backbone of global connectivity that most people don't think about.

The study by researchers Wenbin Wu and Alexander Neumueller digs into how the network depends on these underwater internet cables for data transmission. What's interesting is they found that random cable failures aren't really a threat, but if someone strategically attacked the critical 'high-betweenness' cables - the ones carrying massive amounts of traffic - it could seriously disrupt Bitcoin's operations.

But here's where it gets encouraging. The Bitcoin community has already been adapting to these physical-layer risks. By 2025, 64% of Bitcoin nodes migrated to the TOR network, which is a smart move. Using TOR creates this compound barrier to disruption because it routes traffic through Europe's robust internet infrastructure, making it way harder to target specific underwater cables or routing providers.

So while the vulnerability around underwater internet cables is real and worth taking seriously, the adoption of TOR shows the network is actively building resilience. It's not a perfect solution, but it demonstrates how Bitcoin's distributed nature lets it adapt when physical infrastructure becomes a potential weak point. The more nodes that shift to these privacy-focused routing options, the less dependent the network becomes on any single set of cables or infrastructure chokepoints.