Inside the London office where swinging pendulums keep cyber threats at bay

There’s an office in London that contains something critical to the security of the global internet — a bunch of swinging pendulums.
Cloudflare London office (c) ianVisits
They’re not even connected to anything, but their perpetual swinging action is what keeps the internet safe(r) from hackers and protects your online transactions from fraudsters.
What they are doing to make things safe is swinging randomly — and in the computer world, being random is surprisingly diffic