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by bomdo 3572 days ago
https://www.kickstarter.com/projects/moonbaseotago/onerng-an...

It's a ~$50 USB dongle, opensource and available for shipping. Anecdotally, I personally used it for an RF project that need uniform randomness and exhausted /dev/random on the target hardware. It worked fine, if a bit slow for my very specific usecase.

That said, if you want to go even cheaper, seriously consider if you can just stick with /dev/urandom. See http://www.2uo.de/myths-about-urandom/ for an interesting read on why that might just work.