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Did You Know Cloudflare Uses Lava Lamps for Encryption?

Randomness is paramount for ensuring secure encryption. Randomness needs to be unpredictable, not just statistical, in cryptography. The goo in lava lamps never forms the same patterns twice. They are unpredictable and random. 

Cloudflare has a wall full of lava lamps at its headquarters. A camera captures these lava lamps. That’s when the magic starts. According to Cloudflare, “The camera takes photos of the lamps at regular intervals and sends the images to Cloudflare servers. All digital images are really stored by computers as a series of numbers, with each pixel having its own numerical value, and so each image becomes a string of totally random numbers that the Cloudflare servers can then use as a starting point for creating secure encryption keys.”