LavaRand: network security with lava lamps (Cloudflare)
As some of you may know, there's a wall of lava lamps in the lobby of our San Francisco office that we use for cryptography. In this post, we’re going to explore how that works in technical detail. (…)
LavaRand is a system that provides an additional entropy source to our production machines. (…) A video feed of this wall is used to generate entropy that is made available to our production fleet. (…)
LavaRand in Production: The Nitty-Gritty Technical Details
There’s a wall of lava lamps in the lobby of our San Francisco office. We use it for cryptography. Here are the nitty-gritty technical details.
Joshua Liebow-Feeser
Edit March 2025: see also the wave machines that Cloudflare has installed in their Lisbon office.
Chaos in Cloudflare’s Lisbon office: securing the Internet with wave motion
Cloudflare is now using a wall of waves in our Lisbon, Portugal office to create entropy and strengthen Internet security, turning liquid chaos into secure, unpredictable encryption.
João Tomé