That title is really misleading; this hack doesn’t require a lava lamp… anymore. I initially went googling for a 1996 project at SGI that generated random numbers by taking photos of a lava lamp. The ...

Cloudflare is on a mission to build a better Internet. And part of how it achieves this is through a wall of lava lamps. Yes, truly. This wall helps generate random numbers for cryptographic keys.

Most people have probably never been to Cloudflare's San Francisco office, but those who have been there would have noticed a large wall of lava lamps in the lobby. It is hard to miss—after all, it is ...

Computers are supposed to be predictable. In 99.9 percent of cases, that’s exactly what we want from them. The exception to that rule? When we’re trying to get a computer to generate a truly random ...