Harnessing chaos in Cloudflare offices

Cloudflare details updates to LavaRand, expanding physical entropy sources beyond lava lamps to include chaotic installations like double pendulums and mobiles, which feed randomness into CSPRNGs and the decentralized drand network. The post explains how drand provides verifiable, unbiased public randomness through threshold BLS signatures, the shift from chained to unchained randomness, and how this enables practical timelock encryption, with a demo for encrypting data to a future drand round.