My goto RNG for a small, supposedly cryptographical secure RNG is ISAAC. https://en.wikipedia.org/wiki/ISAAC_(cipher) https://en.wikipedia.org/wiki/ISAAC_(ciphe

My goto RNG for a small, supposedly cryptographical secure RNG is ISAAC. https://en.wikipedia.org/wiki/ISAAC_(cipher) https://en.wikipedia.org/wiki/ISAAC_(cipher) (There's a standalone C code implementation available at https://ccodearchive.net/info/isaac.html https://ccodearchive.net/info/isaac.html)