I think VIA [1] did this on some of their mini-ITX boards with embedded CPUs. I seem to recall a contemporary review saying that they used electrical noise to i

I think VIA [1] did this on some of their mini-ITX boards with embedded CPUs. I seem to recall a contemporary review saying that they used electrical noise to implement an RNG, a fact which is corroborated [2] here: > Nehemiah stepping 3 and higher offers an electrical noise-based random number generator (RNG) that produces good random numbers for different purposes. [1] https://en.m.wikipedia.org/wiki/VIA_PadLock https://en.m.wikipedia.org/wiki/VIA_PadLock [2] http://www.logix.cz/michal/doc/article.xp/padlock-en http://www.logix.cz/michal/doc/article.xp/padlock-en