As if the highly randomized entropy from the lava lamps wasn't enough, Cloudflare mixes the seed with data generated on two different Linux machines.

The lava lamp wall is another set of dice that happens to demonstrate to its customers how encryption works–and also looks great in its office.

By using lava lamps, Cloudflare has created an additional entropy source with numbers that are based on the flow of the liquid, which is "very unpredictable." ...

One hundred brightly colored lava lamps sit in the lobby of Cloudflare. It's a far-out site that does more than set a vibe. The 60s favorite is helping encrypt the internet.

A live stream of the wall of lava lamps “provides a source of true entropy”.

Security company Cloudflare has an innovative approach to generating random numbers for encryption purposes: use a shelf full of lava lamps.

The floating, liquid wax inside each of them dictates the numbers that make up encryption codes. Cloudflare collects this data by filming the lamps from a wall-mounted camera.