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If lives (or life savings) are at stake, I'd still xor some dice values in the mix.

https://glacierprotocol.org/docs/deposit/generate-cold-stora...

Or some lava lamps

Probably a reference to cloudflare: https://www.cloudflare.com/learning/ssl/lava-lamp-encryption...

lavarand was invented and patented by SGI in 1996: https://www.lavarand.org/news/lavadiff.html

There was a library to use webcams for entropy called lavarnd up until about 8 years ago, as well. I am unsure if the api to the os changed or there's a functional difference between ccd and cmos or whatever.

I do a lot of entropy research, and was annoyed I had to roll my own implementation for a no-photon camera entropy source.