xkcd #221: Random Number (9 Nov 2007) ( programming.dev )

LazaroFilm , 5 months ago

I prefer using a whole wall of lava lamps for a random number.

MNByChoice , 5 months ago

Seems like the place to share. Ages ago a group epoxied a webcam and used the random flashes (from cosmic rays?) as their source of randomness.

rmuk , 5 months ago

I think what they’re referring to is a company - I think it’s CloudFlare - who use a bunch of physical randomness generators to seed their commercial random number generator. One of those seeds is a webcam pointed at a load of lava lamps.

youtu.be/1cUUfMeOijg